Publications (103)
Magneto-Josephson effects in junctions with Majorana bound states
Liang Jiang, David Pekker, Jason Alicea +4
We investigate 1D quantum systems that support Majorana bound states at interfaces between topologically distinct regions. In particular, we show that there exists a duality betwee…
Interaction-driven Band Flattening and Correlated Phases in Twisted Bilayer Graphene
Youngjoon Choi, Hyunjin Kim, Cyprian Lewandowski +8
Flat electronic bands, characteristic of magic-angle twisted bilayer graphene (TBG), host a wealth of correlated phenomena. Early theoretical considerations suggested that, at the…
Practical roadmap to measurement-altered criticality in Rydberg arrays
Stephen Naus, Yue Liu, Sara Murciano +3
Weak measurements have been predicted to dramatically alter universal properties of quantum critical wavefunctions, though experimental validation remains an open problem. Here we…
Approximating the Sachdev-Ye-Kitaev model with Majorana wires
Aaron Chew, Andrew Essin, Jason Alicea
The Sachdev-Ye-Kitaev (SYK) model describes a collection of randomly interacting Majorana fermions that exhibits profound connections to quantum chaos and black holes. We propose a…
Classification of spin liquids on the square lattice with strong spin-orbit coupling
Johannes Reuther, Shu-Ping Lee, Jason Alicea
Spin liquids represent exotic types of quantum matter that evade conventional symmetry-breaking order even at zero temperature. Exhaustive classifications of spin liquids have been…
Majorana Fermions in Equilibrium and Driven Cold Atom Quantum Wires
Liang Jiang, Takuya Kitagawa, Jason Alicea +7
We introduce a new approach to create and detect Majorana fermions using optically trapped 1D fermionic atoms. In our proposed setup, two internal states of the atoms couple via an…
Microscopic characterization of Ising conformal field theory in Rydberg chains
Kevin Slagle, David Aasen, Hannes Pichler +5
Rydberg chains provide an appealing platform for probing conformal field theories (CFTs) that capture universal behavior in a myriad of physical settings. Focusing on a Rydberg cha…
Exotic non-Abelian anyons from conventional fractional quantum Hall states
David J. Clarke, Jason Alicea, Kirill Shtengel
Non-Abelian anyons--particles whose exchange noncommutatively transforms a system's quantum state--are widely sought for the exotic fundamental physics they harbor as well as for q…
Tunable spin-orbit coupling and symmetry-protected edge states in graphene/WS
Bowen Yang, Min-Feng Tu, Jeongwoo Kim +6
We demonstrate clear weak anti-localization (WAL) effect arising from induced Rashba spin-orbit coupling (SOC) in WS-covered single-layer and bilayer graphene devices. Contrary…
Ising Anyons in Frustration-Free Majorana-Dimer Models
Brayden Ware, Jun Ho Son, Meng Cheng +3
Dimer models have long been a fruitful playground for understanding topological physics. Here we introduce a new class - termed Majorana-dimer models - wherein bosonic dimers are d…
Interaction effects in superconductor/quantum spin Hall devices: universal transport signatures and fractional Coulomb blockade
David Aasen, Shu-Ping Lee, Torsten Karzig +1
Interfacing s-wave superconductors and quantum spin Hall edges produces time-reversal-invariant topological superconductivity of a type that can not arise in strictly 1D systems. W…
Symmetry and duality in bosonization of two-dimensional Dirac fermions
David F. Mross, Jason Alicea, Olexei I. Motrunich
Recent work on a family of boson-fermion mappings has emphasized the interplay of symmetry and duality: Phases related by a particle-vortex duality of bosons (fermions) are related…
Topological superconductivity in nanowires proximate to a diffusive superconductor-magnetic insulator bilayer
Aleksei Khindanov, Jason Alicea, Patrick Lee +2
We study semiconductor nanowires coupled to a bilayer of a disordered superconductor and a magnetic insulator, motivated by recent experiments reporting possible Majorana-zero-mode…
Spectroscopic Signatures of Strong Correlations and Unconventional Superconductivity in Twisted Trilayer Graphene
Hyunjin Kim, Youngjoon Choi, Cyprian Lewandowski +7
Magic-angle twisted trilayer graphene (MATTG) has emerged as a novel moiré material that exhibits both strong electronic correlations and unconventional superconductivity. However…
Noise-induced backscattering in a quantum-spin-Hall edge
Jukka I. Väyrynen, Dmitry I. Pikulin, Jason Alicea
Time-reversal symmetry suppresses electron backscattering in a quantum-spin-Hall edge, yielding quantized conductance at zero temperature. Understanding the dominant corrections in…
Anomalous Quasiparticle Symmetries and Non-Abelian Defects on Symmetrically Gapped Surfaces of Weak Topological Insulators
David F. Mross, Andrew Essin, Jason Alicea +1
We show that boundaries of 3D weak topological insulators can become gapped by strong interactions while preserving all symmetries, leading to Abelian surface topological order. Th…
Quantum criticality under imperfect teleportation
Pablo Sala, Sara Murciano, Yue Liu +1
Entanglement, measurement, and classical communication together enable teleportation of quantum states between distant parties, in principle with perfect fidelity. To what extent d…
Scalable Designs for Quasiparticle-Poisoning-Protected Topological Quantum Computation with Majorana Zero Modes
Torsten Karzig, Christina Knapp, Roman M. Lutchyn +9
We present designs for scalable quantum computers composed of qubits encoded in aggregates of four or more Majorana zero modes, realized at the ends of topological superconducting…
Explicit derivation of duality between a free Dirac cone and quantum electrodynamics in (2+1) dimensions
David F. Mross, Jason Alicea, Olexei I. Motrunich
We explicitly derive the duality between a free electronic Dirac cone and quantum electrodynamics in dimensions (QED) with fermion flavors. The duality proceeds…
Majorana fermions in a tunable semiconductor device
Jason Alicea
The experimental realization of Majorana fermions presents an important problem due to their non-Abelian nature and potential exploitation for topological quantum computation. Very…
Deformed triangular lattice antiferromagnets in a magnetic field: role of spatial anisotropy and Dzyaloshinskii-Moriya interactions
Christian Griset, Shane Head, Jason Alicea +1
Recent experiments on the anisotropic spin-1/2 triangular antiferromagnet Cs_2CuBr_4 have revealed a remarkably rich phase diagram in applied magnetic fields, consisting of an unex…
Revealing topological superconductivity in extended quantum spin Hall Josephson junctions
Shu-Ping Lee, Karen Michaeli, Jason Alicea +1
Quantum spin Hall-superconductor hybrids are promising sources of topological superconductivity and Majorana modes, particularly given recent progress on HgTe and InAs/GaSb. We pro…
Experimental observation of conformal field theory spectra
Xiangkai Sun, Yuan Le, Stephen Naus +6
Conformal field theories (CFTs) feature prominently in high-energy physics, statistical mechanics, and condensed matter. For example, CFTs govern emergent universal properties of s…
Bosonic Analogue of Dirac Composite Fermi Liquid
David F. Mross, Jason Alicea, Olexei I. Motrunich
We introduce a particle-hole-symmetric metallic state of bosons in a magnetic field at odd-integer filling. This state hosts composite fermions whose energy dispersion features a q…
Decoherence and wavefunction deformation of non-Abelian topological order
Pablo Sala, Jason Alicea, Ruben Verresen
The effect of decoherence on topological order (TO) has been most deeply understood for the toric code, the paragon of Abelian TOs. We show that certain non-Abelian TOs can be anal…
Assembling Fibonacci Anyons From a Parafermion Lattice Model
E. M. Stoudenmire, David J. Clarke, Roger S. K. Mong +1
Recent concrete proposals suggest it is possible to engineer a two-dimensional bulk phase supporting non-Abelian Fibonacci anyons out of Abelian fractional quantum Hall systems. Th…
Robust Helical Edge Transport in Quantum Spin Hall Quantum Wells
Rafal Skolasinski, Dmitry I. Pikulin, Jason Alicea +1
We show that burying of the Dirac point in semiconductor-based quantum-spin-Hall systems can generate unexpected robustness of edge states to magnetic fields. A detailed ${\bf k\cd…
Superconductivity from spin-canting fluctuations in rhombohedral graphene
Zhiyu Dong, Ãtienne Lantagne-Hurtubise, Jason Alicea
Rhombohedral graphene multilayers host various broken-symmetry metallic phases as well as superconductors whose pairing mechanism and order parameter symmetry remain unsettled. Str…
Quantum Anomalous Parity Hall Effect in Magnetically Disordered Topological Insulator Films
Arbel Haim, Roni Ilan, Jason Alicea
In magnetically doped thin-film topological insulators, aligning the magnetic moments generates a quantum anomalous Hall phase supporting a single chiral edge state. We show that a…
Milestones toward Majorana-based quantum computing
David Aasen, Michael Hell, Ryan V. Mishmash +8
We introduce a scheme for preparation, manipulation, and readout of Majorana zero modes in semiconducting wires with mesoscopic superconducting islands. Our approach synthesizes re…
Assembling Kitaev honeycomb spin liquids from arrays of 1D symmetry protected topological phases
Yue Liu, Nathanan Tantivasadakarn, Kevin Slagle +2
The Kitaev honeycomb model, which is exactly solvable by virtue of an extensive number of conserved quantities, supports a gapless quantum spin liquid phase as well as gapped desce…
Critical spin liquid at 1/3 magnetization in a spin-1/2 triangular antiferromagnet
Jason Alicea, Matthew P. A. Fisher
Although magnetically ordered at low temperatures, the spin-1/2 triangular antiferromagnet Cs_2CuCl_4 exhibits remarkable spin dynamics that strongly suggest proximity to a spin li…
Probing Defects with Quantum Simulator Snapshots
Abhijat Sarma, Nayan Myerson-Jain, Yue Liu +4
Snapshots, i.e. projective measurements of local degrees of freedom, are the most standard data taken in experiments on quantum simulators. Snapshots are usually used to probe loca…
Edge states of 2D time-reversal-invariant topological superconductors with strong interactions and disorder: A view from the lattice
Jun Ho Son, Jason Alicea, Olexei I. Motrunich
Two-dimensional time-reversal-invariant topological superconductors host helical Majorana fermions at their boundary. We study the fate of these edge states under the combined infl…
Electrical probes of the non-Abelian spin liquid in Kitaev materials
David Aasen, Roger S. K. Mong, Benjamin M. Hunt +2
Recent thermal-conductivity measurements evidence a magnetic-field-induced non-Abelian spin liquid phase in the Kitaev material -. Although the platform is a…
Impurity Effects in Highly Frustrated Diamond Lattice Antiferromagnets
Lucile Savary, Emanuel Gull, Simon Trebst +3
We consider the effects of local impurities in highly frustrated diamond lattice antiferromagnets, which exhibit large but non-extensive ground state degeneracies. Such models are…
Approaching a topological phase transition in Majorana nanowires
Ryan V. Mishmash, David Aasen, Andrew P. Higginbotham +1
Recent experiments have produced mounting evidence of Majorana zero modes in nanowire-superconductor hybrids. Signatures of an expected topological phase transition accompanying th…
Spin chains, defects, and quantum wires for the quantum-double edge
Victor V. Albert, David Aasen, Wenqing Xu +3
Non-Abelian defects that bind Majorana or parafermion zero modes are prominent in several topological quantum computation schemes. Underpinning their established understanding is t…
Manipulating Majorana fermions using supercurrents
Alessandro Romito, Jason Alicea, Gil Refael +1
Topological insulator edges and spin-orbit-coupled quantum wires in proximity to s-wave super- conductors can be tuned through a topological quantum phase transition by a Zeeman fi…
Correlated Phases in Spin-Orbit-Coupled Rhombohedral Trilayer Graphene
Jin Ming Koh, Jason Alicea, Ãtienne Lantagne-Hurtubise
Recent experiments indicate that crystalline graphene multilayers exhibit much of the richness of their twisted counterparts, including cascades of symmetry-broken states and uncon…
Universal topological quantum computation from a superconductor/Abelian quantum Hall heterostructure
Roger S. K. Mong, David J. Clarke, Jason Alicea +8
Non-Abelian anyons promise to reveal spectacular features of quantum mechanics that could ultimately provide the foundation for a decoherence-free quantum computer. A key breakthro…
Quantum stabilization of 1/3-magnetization plateau in Cs_2CuBr_4
Jason Alicea, Andrey V. Chubukov, Oleg A. Starykh
We consider the phase diagram of a spatially anisotropic 2D triangular antiferromagnet in a magnetic field. Classically, the ground state is umbrella-like for all fields, but we sh…
Andreev reflection spectroscopy in strongly paired superconductors
Cyprian Lewandowski, Ãtienne Lantagne-Hurtubise, Alex Thomson +2
Motivated by recent experiments on low-carrier-density superconductors, including twisted multilayer graphene, we study signatures of the BCS to BEC evolution in Andreev reflection…
Spin-Orbit Enhanced Superconductivity in Bernal Bilayer Graphene
Yiran Zhang, Robert Polski, Alex Thomson +7
In the presence of a large perpendicular electric field, Bernal-stacked bilayer graphene (BLG) features several broken-symmetry metallic phases as well as magnetic-field-induced su…
Survival of the fractional Josephson effect in time-reversal-invariant topological superconductors
Christina Knapp, Aaron Chew, Jason Alicea
Time-reversal-invariant topological superconductor (TRITOPS) wires host Majorana Kramers pairs that have been predicted to mediate a fractional Josephson effect with periodic…
Dynamics of Majorana-based qubits operated with an array of tunable gates
Bela Bauer, Torsten Karzig, Ryan V. Mishmash +2
We study the dynamics of Majorana zero modes that are shuttled via local tuning of the electrochemical potential in a superconducting wire. By performing time-dependent simulations…
Vortex-enabled Andreev processes in quantum Hall-superconductor hybrids
Yuchen Tang, Christina Knapp, Jason Alicea
Quantum Hall-superconductor heterostructures provide possible platforms for intrinsically fault-tolerant quantum computing. Motivated by several recent experiments that successfull…
Exotic circuit elements from zero-modes in hybrid superconductor/quantum Hall systems
David J. Clarke, Jason Alicea, Kirill Shtengel
Heterostructures formed by quantum Hall systems and superconductors have recently been shown to support widely coveted Majorana fermion zero-modes and still more exotic `parafermio…
Quantum anomalous Hall effects and emergent Hall ferromagnets at fractional filling of helical trilayer graphene
Sen Niu, Jason Alicea, D. N. Sheng +1
Helical trilayer graphene realizes a versatile moiré system for exploring correlated topological states emerging from high Chern bands. Motivated by recent experimental observatio…
Measurement-altered Ising quantum criticality
Sara Murciano, Pablo Sala, Yue Liu +2
Quantum critical systems constitute appealing platforms for the exploration of novel measurement-induced phenomena due to their innate sensitivity to perturbations. We study the im…
Superconductivity and spin canting in spin-orbit proximitized rhombohedral trilayer graphene
Caitlin L. Patterson, Owen I. Sheekey, Trevor B. Arp +15
Graphene and transition metal dichalcogenide flat-band systems show similar phase diagrams, replete with magnetic and superconducting phases. An abiding question has been whether m…
Commuting-projector Hamiltonians for chiral topological phases built from parafermions
Jun Ho Son, Jason Alicea
We introduce a family of commuting-projector Hamiltonians whose degrees of freedom involve parafermion zero modes residing in a parent fractional-quantum-Hall flui…
Engineering a robust quantum spin Hall state in graphene via adatom deposition
Conan Weeks, Jun Hu, Jason Alicea +2
The 2007 discovery of quantized conductance in HgTe quantum wells delivered the field of topological insulators (TIs) its first experimental confirmation. While many three-dimensio…
Stability of zero modes in parafermion chains
Adam S. Jermyn, Roger S. K. Mong, Jason Alicea +1
One-dimensional topological phases can host localized zero-energy modes that enable high-fidelity storage and manipulation of quantum information. Majorana fermion chains support a…
Bismuth in strong magnetic fields: unconventional Zeeman coupling and correlation effects
Jason Alicea, Leon Balents
Recent experiments on bismuth have uncovered remarkably rich magnetization structure at fields well beyond the regime in which all carriers are expected to reside in the lowest Lan…
Quantum sensing with critical systems: impact of symmetry, imperfections, and decoherence
Yinan Chen, Sara Murciano, Pablo Sala +1
Entangled many-body states enable high-precision quantum sensing beyond the standard quantum limit. We develop interferometric sensing protocols based on quantum critical wavefunct…
Symmetry-broken metallic orders in spin-orbit-coupled Bernal bilayer graphene
Jin Ming Koh, Alex Thomson, Jason Alicea +1
We explore Bernal bilayer graphene in the presence of long-range Coulomb interactions, short-range Hund's coupling, and proximity-induced Ising spin-orbit coupling using self-consi…
Magneto-Josephson effects and Majorana bound states in quantum wires
Falko Pientka, Liang Jiang, David Pekker +4
A prominent signature of Majorana bound states is the exotic Josephson effects they produce, the classic example being a fractional Josephson current with 4Ïperiodicity in the pha…
Gate defined wires in HgTe quantum wells: from Majorana fermions to spintronics
Johannes Reuther, Jason Alicea, Amir Yacoby
We introduce a promising new platform for Majorana zero-modes and various spintronics applications based on gate-defined wires in HgTe quantum wells. Due to the Dirac-like band str…
Statistical Mechanics and Symmetries of Non-Abelian Anyon Proliferation: From Deformation to Decoherence
Avi Vadali, Robijn Vanhove, Ruben Verresen +2
Topological quantum computation relies on braiding non-Abelian anyons, but requires the underlying topological order to survive imperfect state preparation and environmental noise.…
Superconductivity without insulating states in twisted bilayer graphene stabilized by monolayer WSe
Harpreet Singh Arora, Robert Polski, Yiran Zhang +11
Magic-angle twisted bilayer graphene (TBG), with rotational misalignment close to 1.1, features isolated flat electronic bands that host a rich phase diagram of correlated…
Topological phases with parafermions: theory and blueprints
Jason Alicea, Paul Fendley
We concisely review the recent evolution in the study of parafermions -- exotic emergent excitations that generalize Majorana fermions and similarly underpin a host of novel phenom…
Unconventional Josephson signatures of Majorana bound states
Liang Jiang, David Pekker, Jason Alicea +3
A junction between two topological superconductors containing a pair of Majorana fermions exhibits a `fractional' Josephson effect, periodic in the superconductors' phase dif…
Giant topological insulator gap in graphene with 5d adatoms
Jun Hu, Jason Alicea, Ruqian Wu +1
Two-dimensional topological insulators (2D TIs) have been proposed as platforms for many intriguing applications, ranging from spintronics to topological quantum information proces…
Electrical manipulation of Majorana fermions in an interdigitated superconductor-ferromagnet device
Shu-Ping Lee, Jason Alicea, Gil Refael
We show that a topological phase supporting Majorana fermions can form in a 2D electron gas (2DEG) adjacent to an interdigitated superconductor-ferromagnet structure. An advantage…
Monopole Quantum Numbers in the Staggered Flux Spin Liquid
Jason Alicea
Algebraic spin liquids, which are exotic gapless spin states preserving all microscopic symmetries, have been widely studied due to potential realizations in frustrated quantum mag…
Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene
Ying-Ming Xie, Ãtienne Lantagne-Hurtubise, Andrea F. Young +2
Recent experiments on Bernal bilayer graphene (BLG) deposited on monolayer WSe revealed robust, ultra-clean superconductivity coexisting with sizable induced spin-orbit couplin…
Time-crystalline Topological Superconductors
Aaron Chew, David F. Mross, Jason Alicea
Time crystals form when arbitrary physical states of a periodically driven system spontaneously break discrete time-translation symmetry. We introduce one-dimensional time-crystall…
Designer non-Abelian anyon platforms: from Majorana to Fibonacci
Jason Alicea, Ady Stern
The emergence of non-Abelian anyons from large collections of interacting elementary particles is a conceptually beautiful phenomenon with important ramifications for fault-toleran…
Boundary transitions from a single round of measurements on gapless quantum states
Yue Liu, Sara Murciano, David F. Mross +1
Measurements can qualitatively alter correlations and entanglement emerging in gapless quantum matter. We show how a single round of measurements on gapless quantum systems can, up…
Theory of the algebraic vortex liquid in an anisotropic spin-1/2 triangular antiferromagnet
Jason Alicea, Olexei I. Motrunich, Matthew P. A. Fisher
We explore spin-1/2 triangular antiferromagnets with both easy-plane and lattice exchange anisotropies by employing a dual vortex mapping followed by a fermionization of the vortic…
Dynamical anyon generation in Kitaev honeycomb non-Abelian spin liquids
Yue Liu, Kevin Slagle, Kenneth S. Burch +1
Relativistic Mott insulators known as 'Kitaev materials' potentially realize spin liquids hosting non-Abelian anyons. Motivated by fault-tolerant quantum-computing applications in…
Recovery of massless Dirac fermions at charge neutrality in strongly interacting twisted bilayer graphene with disorder
Alex Thomson, Jason Alicea
Stacking two graphene layers twisted by the 'magic angle' generates flat energy bands, which in turn catalyzes various strongly correlated phenomena depending…
Charge accumulation on a Luttinger liquid
Jason Alicea, Leon Balents, Cristina Bena +1
The average charge Q on a quantum wire, modeled as a single-channel Luttinger liquid, connected to metallic leads and coupled to a gate is studied theoretically. We find that the b…
Gate-defined wires in twisted bilayer graphene: from electrical detection of inter-valley coherence to internally engineered Majorana modes
Alex Thomson, Ina Sorensen, Stevan Nadj-Perge +1
Twisted bilayer graphene (TBG) realizes a highly tunable, strongly interacting system featuring superconductivity and various correlated insulating states. We establish gate-define…
Adiabatic manipulations of Majorana fermions in a three-dimensional network of quantum wires
Bertrand I. Halperin, Yuval Oreg, Ady Stern +3
It has been proposed that localized zero-energy Majorana states can be realized in a two-dimensional network of quasi-one-dimensional semiconductor wires that are proximity-coupled…
Non-Fermi liquid and Weyl superconductivity from the weakly interacting 3D electron gas at high magnetic fields
Nandagopal Manoj, Valerio Peri, Jason Alicea
Three-dimensional electron gases in strong magnetic fields host partially flat bands that disperse along the field direction yet exhibit Landau-level quantization in the transverse…
New directions in the pursuit of Majorana fermions in solid state systems
Jason Alicea
The 1937 theoretical discovery of Majorana fermions--whose defining property is that they are their own anti-particles--has since impacted diverse problems ranging from neutrino ph…
Quantum Geometric Kohn-Luttinger Superconductivity
Gal Shavit, Jason Alicea
Coulomb repulsion can, counterintuitively, mediate Cooper pairing via the Kohn-Luttinger mechanism. However, it is commonly believed that observability of the effect requires speci…
Non-Abelian statistics and topological quantum information processing in 1D wire networks
Jason Alicea, Yuval Oreg, Gil Refael +2
Topological quantum computation provides an elegant way around decoherence, as one encodes quantum information in a non-local fashion that the environment finds difficult to corrup…
Imaging inter-valley coherent order in magic-angle twisted trilayer graphene
Hyunjin Kim, Youngjoon Choi, Ãtienne Lantagne-Hurtubise +12
Magic-angle twisted trilayer graphene (MATTG) exhibits a range of strongly correlated electronic phases that spontaneously break its underlying symmetries. The microscopic nature o…
Parafermionic conformal field theory on the lattice
Roger S. K. Mong, David J. Clarke, Jason Alicea +2
Finding the precise correspondence between lattice operators and the continuum fields that describe their long-distance properties is a largely open problem for strongly interactin…
Criticality in quantum triangular antiferromagnets via fermionized vortices
Jason Alicea, Olexei I. Motrunich, Michael Hermele +1
We revisit two-dimensional frustrated quantum magnetism from a new perspective, with the aim of exploring new critical points and critical phases. We study easy-plane triangular an…
Thermal anyon interferometry in phonon-coupled Kitaev spin liquids
Kai Klocke, Joel E. Moore, Jason Alicea +1
Recent theoretical studies inspired by experiments on the Kitaev magnet -RuCl highlight the nontrivial impact of phonons on the thermal Hall conductivity of chiral topologi…
Time-domain anyon interferometry in Kitaev honeycomb spin liquids and beyond
Kai Klocke, David Aasen, Roger S. K. Mong +2
Motivated by recent experiments on the Kitaev honeycomb magnet , we introduce time-domain probes of the edge and quasiparticle content of non-Abelian spin liquids…
Resistance of multilayers with long length scale interfacial roughness
Jason Alicea, Selman Hershfield
The resistance of multilayers with interface roughness on a length scale which is large compared to the atomic spacing is computed in several cases via the Boltzmann equation. This…
Quantum spin liquids bootstrapped from Ising criticality in Rydberg arrays
Kevin Slagle, Yue Liu, David Aasen +5
Arrays of Rydberg atoms constitute a highly tunable, strongly interacting venue for the pursuit of exotic states of matter. We develop a new strategy for accessing a family of frac…
Ascendance of Superconductivity in Magic-Angle Graphene Multilayers
Yiran Zhang, Robert Polski, Cyprian Lewandowski +10
Graphene moire superlattices have emerged as a platform hosting and abundance of correlated insulating, topological, and superconducting phases. While the origins of strong correla…
Dephasing and leakage dynamics of noisy Majorana-based qubits: Topological versus Andreev
Ryan V. Mishmash, Bela Bauer, Felix von Oppen +1
Topological quantum computation encodes quantum information nonlocally by nucleating non-Abelian anyons separated by distances , typically spanning the qubit device size. This n…
Interplay between lattice-scale physics and the quantum Hall effect in graphene
Jason Alicea, Matthew P. A. Fisher
Graphene's honeycomb lattice structure underlies much of the remarkable physics inherent in this material, most strikingly through the formation of two ``flavors'' of Dirac cones f…
Commuting-projector Hamiltonians for 2D topological insulators: edge physics and many-body invariants
Jun Ho Son, Jason Alicea
Inspired by a recently constructed commuting-projector Hamiltonian for a two-dimensional (2D) time-reversal-invariant topological superconductor [Wang et al., Phys. Rev. B 98, 0945…
Gapped Parent Hamiltonians for the Strongly Deformed Toric Code
Nandagopal Manoj, Zack Weinstein, Jason Alicea
Local non-unitary deformations of topologically ordered wavefunctions can drive transitions into peculiar states that challenge modern perspectives on gapped quantum matter. The st…
Numerical exploration of trial wave functions for the particle-hole-symmetric Pfaffian
Ryan V. Mishmash, David F. Mross, Jason Alicea +1
We numerically assess model wave functions for the recently proposed particle-hole-symmetric Pfaffian (`PH-Pfaffian') topological order, a phase consistent with the recently report…
Interaction Effects in Topological Superconducting Wires Supporting Majorana Fermions
E. M. Stoudenmire, Jason Alicea, Oleg A. Starykh +1
Among the broad spectrum of systems predicted to exhibit topological superconductivity and Majorana fermions, one-dimensional wires with strong spin-orbit coupling provide one of t…
Order by disorder and spiral spin liquid in frustrated diamond lattice antiferromagnets
Doron Bergman, Jason Alicea, Emanuel Gull +2
Frustration refers to competition between different interactions that cannot be simultaneously satisfied, a familiar feature in many magnetic solids. Strong frustration results in…
Algebraic vortex liquid in spin-1/2 triangular antiferromagnets: Scenario for Cs_2CuCl_4
Jason Alicea, Olexei I. Motrunich, Matthew P. A. Fisher
Motivated by inelastic neutron scattering data on Cs_2CuCl_4, we explore spin-1/2 triangular lattice antiferromagnets with both spatial and easy-plane exchange anisotropies, the la…
Tracing out Correlated Chern Insulators in Magic Angle Twisted Bilayer Graphene
Youngjoon Choi, Hyunjin Kim, Yang Peng +9
Magic-angle twisted bilayer graphene (MATBG) exhibits a range of correlated phenomena that originate from strong electron-electron interactions. These interactions make the Fermi s…
Imaging Electronic Correlations in Twisted Bilayer Graphene near the Magic Angle
Youngjoon Choi, Jeannette Kemmer, Yang Peng +11
Twisted bilayer graphene with a twist angle of around 1.1° features a pair of isolated flat electronic bands and forms a strongly correlated electronic platform. Here, we use scan…
Graphene integer quantum Hall effect in the ferromagnetic and paramagnetic regimes
Jason Alicea, Matthew P. A. Fisher
Starting from the graphene lattice tight-binding Hamiltonian with an on-site U and long-range Coulomb repulsion, we derive an interacting continuum Dirac theory governing the low-e…
Spin-liquid-based topological qubits
Kai Klocke, Yue Liu, Gábor B. Halász +1
Topological quantum computation relies on control of non-Abelian anyons for inherently fault-tolerant storage and processing of quantum information. By now, blueprints for topologi…