92 citations · 592 across the 21 of their papers we have counts for
21 papers
Fault-Tolerant Quantum Computing with Trapped Ions: The Walking Cat Architecture
Felix Tripier, Woo Chang Chung, Jacob Young +15
We propose a fault-tolerant quantum computer architecture for trapped-ion devices, which we call the walking cat architecture. Our blueprint includes a compiler, a detailed descrip…
Simulating time evolution on distributed quantum computers
Finn Lasse Buessen, Dvira Segal, Ilia Khait
We study a variation of the Trotter-Suzuki decomposition, in which a Hamiltonian exponential is approximated by an ordered product of two-qubit operator exponentials such that the…
Exchange interactions and spin dynamics in the layered honeycomb ferromagnet CrI
Subhadeep Bandyopadhyay, Finn Lasse Buessen, Ritwik Das +4
We derive the microscopic spin Hamiltonian for rhombohedral CrI using extensive first-principles density functional theory (DFT) calculations which incorporate spin-orbit coupl…
Pre-thermalization via self-driving and external driving of extensive subsystems
Finn Lasse Buessen, Hyun-Yong Lee, Tarun Grover +1
We investigate the non-equilibrium states of an interacting multi-component quantum system when only an extensive subsystem is quantum-quenched or driven from the ground state. As…
Order by disorder in classical kagome antiferromagnets with chiral interactions
Jackson Pitts, Finn Lasse Buessen, Roderich Moessner +2
The Heisenberg antiferromagnet on the kagome lattice is an archetypal instance of how large ground state degeneracies arise, and how they may get resolved by thermal and quantum fl…
Dynamical Signatures of Rank-2 Spin Liquids
Emily Z. Zhang, Finn Lasse Buessen, Yong Baek Kim
Emergent gauge theories and artificial photons in frustrated magnets are outstanding examples of many-body collective phenomena. The classical and quantum regimes of these s…
The SpinParser software for pseudofermion functional renormalization group calculations on quantum magnets
Finn Lasse Buessen
We present the SpinParser open-source software [ https://github.com/fbuessen/SpinParser ]. The software is designed to perform pseudofermion functional renormalization group (pf-FR…
Functional renormalization group study of the Kitaev- model on the honeycomb lattice and emergent incommensurate magnetic correlations
Finn Lasse Buessen, Yong Baek Kim
The theoretical inception of the Kitaev honeycomb model has had defining influence on the experimental hunt for quantum spin liquids, bringing unprecedented focus onto the synthesi…
Nematic order driven by superconducting correlations
Finn Lasse Buessen, Sopheak Sorn, Ivar Martin +1
The interplay of nematicity and superconductivity has been observed in a wide variety of quantum materials. To explore this interplay, we consider a two-dimensional (2D) array of n…
Molecular dipoles in designer honeycomb lattices
Nazim Boudjada, Finn Lasse Buessen, Arun Paramekanti
Recent advances in ultracold atoms in optical lattices and developments in surface science have allowed for the creation of artificial lattices as well as the control of many-body…
Coherent Helicity-Dependent Spin-Phonon Oscillations in the Ferromagnetic van der Waals Crystal CrI3
P. Padmanabhan, F. L. Buessen, R. Tutchton +9
The discovery of two-dimensional (2D) systems hosting intrinsic long-range magnetic order represents a seminal addition to the rich physical landscape of van der Waals (vdW) materi…
Magnetic vortex liquid and anomalous thermal Hall conductivity in frustrated magnets with bond-dependent interactions
Li Ern Chern, Finn Lasse Buessen, Yong Baek Kim
Recently, the observation of large thermal Hall conductivities in correlated insulators with no apparent broken symmetry have generated immense interest and debates on the underlyi…
Domes of in single-band and multiband superconductors with finite-range attractive interactions
Nazim Boudjada, Finn Lasse Buessen, Arun Paramekanti
The rise and fall of the superconducting transition temperature upon tuning carrier density or external parameters, such as pressure or magnetic field, is ubiquitously observ…
Emergence and stability of spin-valley entangled quantum liquids in moiré heterostructures
Dominik Kiese, Finn Lasse Buessen, Ciarán Hickey +2
Twisting moiré heterostructures to the flatband regime allows for the formation of strongly correlated quantum states, since the dramatic reduction of the bandwidth can cause the r…
Fingerprints of Kitaev physics in the magnetic excitations of honeycomb iridates
A. Revelli, M. Moretti Sala, G. Monaco +11
In the quest for realizations of quantum spin liquids, the exploration of Kitaev materials - spin-orbit entangled Mott insulators with strong bond-directional exchanges - has taken…
Functional renormalization group for frustrated magnets with nondiagonal spin interactions
Finn Lasse Buessen, Vincent Noculak, Simon Trebst +1
In the field of quantum magnetism, the advent of numerous spin-orbit assisted Mott insulating compounds, such as the family of Kitaev materials, has led to a growing interest in st…
Spin-orbit entangled j=1/2 moments in BaCeIrO -- a frustrated fcc quantum magnet
A. Revelli, C. C. Loo, D. Kiese +16
We establish the double perovskite BaCeIrO as a nearly ideal model system for j=1/2 moments, with resonant inelastic x-ray scattering indicating a deviation of less than 1%…
Functional renormalization group approach to SU(N) Heisenberg models: Momentum-space RG for the large-N limit
Dietrich Roscher, Finn Lasse Buessen, Michael M. Scherer +2
In frustrated magnetism, making a stringent connection between microscopic spin models and macroscopic properties of spin liquids remains an important challenge. A recent step towa…
Functional renormalization group approach to SU(N) Heisenberg models: Real-space RG at arbitrary N
Finn Lasse Buessen, Dietrich Roscher, Sebastian Diehl +1
The pseudofermion functional renormalization group (pf-FRG) is one of the few numerical approaches that has been demonstrated to quantitatively determine the ordering tendencies of…
Quantum spin liquids in frustrated spin-1 diamond antiferromagnets
Finn Lasse Buessen, Max Hering, Johannes Reuther +1
Motivated by the recent synthesis of the spin-1 A-site spinel NiRhO, we investigate the classical to quantum crossover of a frustrated - Heisenber…
Competing magnetic orders and spin liquids in two- and three-dimensional kagome systems: A pseudo-fermion functional renormalization group perspective
Finn Lasse Buessen, Simon Trebst
Quantum magnets on kagome lattice geometries in two and three spatial dimensions are archetypal examples of spin systems in which geometric frustration inhibits conventional magnet…