Publications (458)
Continuum quantum ferromagnets at finite temperature and the Quantum Hall effect
N. Read, Subir Sachdev
We study finite temperature () properties of the continuum quantum field theory of systems with a ferromagnetic ground state. A scaling theory of the system is discussed c…
Angular fluctuations of a multi-component order describe the pseudogap regime of the cuprate superconductors
Lauren E. Hayward, David G. Hawthorn, Roger G. Melko +1
The hole-doped cuprate high temperature superconductors enter the pseudogap regime as their superconducting critical temperature, , falls with decreasing hole density. Experim…
Quantum Conductors in a Plane
Philip Phillips, Subir Sachdev, Sergey Kravchenko +1
When electrons are confined to move in a plane, strange things happen. For example, under normal circumstances, they are not expected to conduct electricity at low temperatures. Ho…
Fractionalized Fermi liquids
T. Senthil, Subir Sachdev, Matthias Vojta
In spatial dimensions d >= 2, Kondo lattice models of conduction and local moment electrons can exhibit a fractionalized, non-magnetic state (FL*) with a Fermi surface of sharp ele…
Sign-problem-free quantum Monte Carlo of the onset of antiferromagnetism in metals
Erez Berg, Max A. Metlitski, Subir Sachdev
The quantum theory of antiferromagnetism in metals is necessary for our understanding of numerous intermetallic compounds of widespread interest. In these systems, a quantum critic…
Relativistic magnetotransport in graphene
Markus Mueller, Lars Fritz, Subir Sachdev +1
We study the thermal and electric transport of a fluid of interacting Dirac fermions as they arise in single-layer graphene. We include Coulomb interactions, a dilute density of ch…
Emergent gauge fields and the high temperature superconductors
Subir Sachdev
The quantum entanglement of many states of matter can be represented by electric and magnetic fields, much like those found in Maxwell's theory. These fields "emerge" from the quan…
Non-zero temperature transport near quantum critical points
Kedar Damle, Subir Sachdev
We describe the nature of charge transport at non-zero temperatures () above the two-dimensional () superfluid-insulator quantum critical point. We argue that the transport i…
Impurity in a d-wave superconductor: Kondo effect and STM spectra
Anatoli Polkovnikov, Subir Sachdev, Matthias Vojta
We present a theory for recent STM studies of Zn impurities in the superconductor BSCCO, using insights from NMR experiments which show that there is a net S=1/2 moment on the Cu i…
Quantum phase transitions of antiferromagnets and the cuprate superconductors
Subir Sachdev
I begin with a proposed global phase diagram of the cuprate superconductors as a function of carrier concentration, magnetic field, and temperature, and highlight its connection to…
Coulomb interactions at quantum Hall critical points of systems in a periodic potential
Jinwu Ye, Subir Sachdev
We study the consequences of long-range Coulomb interactions at the critical points between integer/fractional quantum Hall states and an insulator. We use low energy theories for…
Condensed matter and AdS/CFT
Subir Sachdev
I review two classes of strong coupling problems in condensed matter physics, and describe insights gained by application of the AdS/CFT correspondence. The first class concerns no…
Keldysh approach for non-equilibrium phase transitions in quantum optics: beyond the Dicke model in optical cavities
Emanuele G. Dalla Torre, Sebastian Diehl, Mikhail D. Lukin +2
We investigate non-equilibrium phase transitions for driven atomic ensembles, interacting with a cavity mode, coupled to a Markovian dissipative bath. In the thermodynamic limit an…
Spin ordering quantum transitions of superconductors in a magnetic field
Eugene Demler, Subir Sachdev, Ying Zhang
We argue that recent neutron scattering measurements by Lake et. al. (Science 291, 1759 (2001)) of the spin excitation spectrum of LSCO in a magnetic field can be understood in ter…
Evidence of zero point fluctuation of vortices in a very weakly pinned a-MoGe thin film
Surajit Dutta, Indranil Roy, John Jesudasan +2
In a Type II superconductor, the vortex core behaves like a normal metal. Consequently, the single-particle density of states in the vortex core of a conventional Type II supercond…
Thermoelectric transport near pair breaking quantum phase transition out of d-wave superconductivity
Daniel Podolsky, Ashvin Vishwanath, Joel Moore +1
We study electric, thermal, and thermoelectric conductivities in the vicinity of a z=2 superconductor-diffusive metal transition in two dimensions, both in the high and low frequen…
Quantum phase transitions of metals in two spatial dimensions: II. Spin density wave order
Max A. Metlitski, Subir Sachdev
We present a field-theoretic renormalization group analysis of Abanov and Chubukov's model of the spin density wave transition in two dimensional metals. We identify the independen…
Translational symmetry breaking in two-dimensional antiferromagnets and superconductors
Subir Sachdev, Matthias Vojta
It was argued many years ago that translational symmetry breaking due to the appearance of spin-Peierls ordering (or bond-charge stripe order) is a fundamental property of the quan…
Spectral functions of the Higgs mode near two-dimensional quantum critical points
Daniel Podolsky, Subir Sachdev
We study the Higgs excitation in the Goldstone phase of the relativistic O(N) model in two spatial dimensions at zero temperature. The response functions of the order parameter, an…
From Ferrimagnetic Insulator to superconducting Luther-Emery Liquid: A DMRG Study of the Two-Leg Lieb Lattice
Alexander Nikolaenko, Subir Sachdev
Motivated by recent experiments on ultracold fermionic spin-1/2 Li atoms in a Lieb lattice at various Hubbard repulsion and filling fractions (Lebrat et al., arXiv:2404…
Thermally fluctuating superconductors in two dimensions
Subir Sachdev, Oleg A. Starykh
We describe the different regimes of finite temperature dynamics in the vicinity of a zero temperature superconductor to insulator quantum phase transition in two dimensions. New r…
Approaching the Thermodynamic Limit with Neural-Network Quantum States
Luciano Loris Viteritti, Riccardo Rende, Subir Sachdev +1
Accessing the thermodynamic-limit properties of strongly correlated quantum matter requires simulations on very large lattices, a regime that remains challenging for numerical meth…
Observation of the Dirac fluid and the breakdown of the Wiedemann-Franz law in graphene
Jesse Crossno, Jing K. Shi, Ke Wang +9
Interactions between particles in quantum many-body systems can lead to collective behavior described by hydrodynamics. One such system is the electron-hole plasma in graphene near…
Charge ordering in three-band models of the cuprates
Alexandra Thomson, Subir Sachdev
We examine trends in the wavevectors and form-factors of charge density wave instabilities of three-band models of the underdoped cuprates. For instabilities from a high temperatur…
Dispersing quasinormal modes in 2+1 dimensional conformal field theories
William Witczak-Krempa, Subir Sachdev
We study the charge response of conformal field theories (CFTs) at non-zero temperature in 2+1 dimensions using the AdS/CFT correspondence. A central role is played by the quasinor…
Fluctuating spin density waves in metals
Subir Sachdev, Max A. Metlitski, Yang Qi +1
Recent work has used a U(1) gauge theory to describe the physics of Fermi pockets in the presence of fluctuating spin density wave order. We generalize this theory to an arbitrary…
Statistical mechanics of strange metals and black holes
Subir Sachdev
A colloquium style review of the connections between the Sachdev-Ye-Kitaev model and strange metals without quasiparticles, and between the SYK model and the quantum properties of…
Destruction of Neel order in the cuprates by electron-doping
Ribhu K. Kaul, Max A. Metlitski, Subir Sachdev +1
Motivated by the evidence in PCCO and NCCO of a magnetic quantum critical point at which Neel order is destroyed, we study the evolution with doping of the T=0 quantum phases of th…
Low temperature quasiparticle transport in a d-wave superconductor with coexisting charge order
Adam C. Durst, Subir Sachdev
In light of the evidence that charge order coexists with d-wave superconductivity in the underdoped cuprate superconductors, we investigate the manner in which such charge order wi…
Quantum critical transport in clean graphene
Lars Fritz, Joerg Schmalian, Markus Mueller +1
We describe electrical transport in ideal single-layer graphene at zero applied bias. There is a crossover from collisionless transport at frequencies larger than k_B T/hbar (T is…
Crossover and scaling in a nearly antiferromagnetic Fermi liquid in two dimensions
Subir Sachdev, Andrey V. Chubukov, Alexander Sokol
We consider two-dimensional Fermi liquids in the vicinity of a quantum transition to a phase with commensurate, antiferromagnetic long-range order. Depending upon the Fermi surface…
Thermoelectric transport in disordered metals without quasiparticles: the SYK models and holography
Richard A. Davison, Wenbo Fu, Antoine Georges +3
We compute the thermodynamic properties of the Sachdev-Ye-Kitaev (SYK) models of fermions with a conserved fermion number, . We extend a previously proposed Schwarzian…
Superconductivity of non-Fermi liquids described by Sachdev-Ye-Kitaev models
Chenyuan Li, Subir Sachdev, Darshan G. Joshi
We investigate models of electrons in the Sachdev-Ye-Kitaev class with random and all-to-all electron hopping, electron spin exchange, and Cooper-pair hopping. An attractive on-sit…
Magnetization of the Shastry-Sutherland antiferromagnet near the Ising limit
Fangzhou Liu, Subir Sachdev
Motivated by recent experiments on TmB4 (arXiv:0712.1537), we examine the phase diagram of the Shastry-Sutherland antiferromagnet in an applied magnetic field in the limit of stron…
Quantum criticality and the phase diagram of the cuprates
Subir Sachdev
I discuss a proposed phase diagram of the cuprate superconductors as a function of temperature, carrier concentration, and a strong magnetic field perpendicular to the layers. I sh…
"Deconfined" quantum critical points
T. Senthil, Ashvin Vishwanath, Leon Balents +2
The theory of second order phase transitions is one of the foundations of modern statistical mechanics and condensed matter theory. A central concept is the observable `order param…
Superfluid-insulator transitions of the Fermi gas with near-unitary interactions in a periodic potential
Eun Gook Moon, Predrag Nikolic, Subir Sachdev
We consider spin-1/2 fermions of mass m with interactions near the unitary limit. In an applied periodic potential of amplitude V and period a, and with a density of an even intege…
Fluctuating orders and quenched randomness in the cuprates
Laimei Nie, Lauren E. Hayward Sierens, Roger G. Melko +2
We study a quasi-2D classical Landau-Ginzburg-Wilson effective field theory in the presence of quenched disorder in which incommensurate charge-density wave and superconducting ord…
Thermal and electrical transport in metals and superconductors across antiferromagnetic and topological quantum transitions
Shubhayu Chatterjee, Subir Sachdev, Andreas Eberlein
We study thermal and electrical transport in metals and superconductors near a quantum phase transition where antiferromagnetic order disappears. The same theory can also be applie…
Quantum oscillations and black hole ringing
Frederik Denef, Sean A. Hartnoll, Subir Sachdev
We show that strongly coupled field theories with holographic gravity duals at finite charge density and low temperatures can undergo de Haas - van Alphen quantum oscillations as a…
Conformal field theories in a periodic potential: results from holography and field theory
Paul Chesler, Andrew Lucas, Subir Sachdev
We study 2+1 dimensional conformal field theories (CFTs) with a globally conserved U(1) charge, placed in a chemical potential which is periodically modulated along the spatial dir…
Holographic Quantum Critical Transport without Self-Duality
Robert C. Myers, Subir Sachdev, Ajay Singh
We describe general features of frequency-dependent charge transport near strongly interacting quantum critical points in 2+1 dimensions. The simplest description using the AdS/CFT…
Phase transition beneath the superconducting dome in BaFe(AsP)
Debanjan Chowdhury, J. Orenstein, Subir Sachdev +1
We present a theory for the large suppression of the superfluid-density, , in BaFe(AsP) in the vicinity of a putative spin-density wave quantum critical p…
Critical metallic phase in the overdoped random - model
Maine Christos, Darshan G. Joshi, Subir Sachdev +1
We investigate a model of electrons with random and all-to-all hopping and spin exchange interactions, with a constraint of no double occupancy. The model is studied in a Sachdev-Y…
Superconductivity and fractionalized magnetic excitations in CeCoIn5
Pyeongjae Park, Shang-Shun Zhang, Pietro M. Bonetti +8
Recent experiments on CeCoIn5 -- a prototypical d-wave superconductor -- indicate that its normal state lies near an unconventional quantum critical point (QCP). One intriguing hyp…
Conductance and its universal fluctuations in the directed network model at the crossover to the quasi-one-dimensional regime
Ilya A. Gruzberg, N. Read, Subir Sachdev
The directed network model describing chiral edge states on the surface of a cylindrical 3D quantum Hall system is known to map to a one-dimensional quantum ferromagnetic spin chai…
Numerical study of fermion and boson models with infinite-range random interactions
Wenbo Fu, Subir Sachdev
We present numerical studies of fermion and boson models with random all-to-all interactions (the SYK models). The high temperature expansion and exact diagonalization of the -s…
Transport and chaos in lattice Sachdev-Ye-Kitaev models
Haoyu Guo, Yingfei Gu, Subir Sachdev
We compute the transport and chaos properties of lattices of quantum Sachdev-Ye-Kitaev islands coupled by single fermion hopping, and with the islands coupled to a large number of…
A critical strange metal from fluctuating gauge fields in a solvable random model
Aavishkar A. Patel, Subir Sachdev
Building upon techniques employed in the construction of the Sachdev-Ye-Kitaev (SYK) model, which is a solvable dimensional model of a non-Fermi liquid, we develop a solvable…
Quantum Impurity in a Nearly Critical Two Dimensional Antiferromagnet
Subir Sachdev, Chiranjeeb Buragohain, Matthias Vojta
We describe the spin dynamics of an arbitrary localized impurity in an insulating two dimensional antiferromagnet, across the host transition from a paramagnet with a spin gap to a…
Equilibrium dynamics of infinite-range quantum spin glasses in a field
Maria Tikhanovskaya, Subir Sachdev, Rhine Samajdar
We determine the low-energy spectrum and Parisi replica symmetry breaking function for the spin glass phase of the quantum Ising model with infinite-range random exchange interacti…
Conductivity of weakly disordered strange metals: from conformal to hyperscaling-violating regimes
Andrew Lucas, Subir Sachdev
We present a semi-analytic method for constructing holographic black holes that interpolate from anti-de Sitter space to hyperscaling-violating geometries. These are holographic du…
Quantum critical point shifts under superconductivity: the pnictides and the cuprates
Eun Gook Moon, Subir Sachdev
We compare the position of an ordering transition in a metal to that in a superconductor. For the spin density wave (SDW) transition, we find that the quantum critical point shifts…
Sign-problem-free effective models of triangular lattice quantum antiferromagnets
Leyna Shackleton, Subir Sachdev
The triangular lattice antiferromagnet with spins and nearest neighbor interactions is known to have long-range antiferromagnetic order, with nearest-neighbor spins at an a…
Emergent gauge theories and topological excitations in Rydberg atom arrays
Rhine Samajdar, Darshan G. Joshi, Yanting Teng +1
Strongly interacting arrays of Rydberg atoms provide versatile platforms for exploring exotic many-body phases and dynamics of correlated quantum systems. Motivated by recent exper…
Quantum phases and phase transitions of Mott insulators
Subir Sachdev
This article contains a theoretical overview of the physical properties of antiferromagnetic Mott insulators in spatial dimensions greater than one. Many such materials have been e…
Renormalization Group Analysis of a Fermionic Hot Spot Model
Seth Whitsitt, Subir Sachdev
We present a renormalization group (RG) analysis of a fermionic "hot spot" model of interacting electrons on the square lattice. We truncate the Fermi surface excitations to linear…
Bekenstein-Hawking Entropy and Strange Metals
Subir Sachdev
We examine models of fermions with infinite-range interactions which realize non-Fermi liquids with a continuously variable U(1) charge density , and a non-zero entrop…
Thermal Hall effect in square-lattice spin liquids: A Schwinger boson mean-field study
Rhine Samajdar, Shubhayu Chatterjee, Subir Sachdev +1
Motivated by recent transport measurements in high- cuprate superconductors in a magnetic field, we study the thermal Hall conductivity in materials with topological order, fo…
Thermal diffusivity and chaos in metals without quasiparticles
Mike Blake, Richard A. Davison, Subir Sachdev
We study the thermal diffusivity in models of metals without quasiparticle excitations (`strange metals'). The many-body quantum chaos and transport properties of such metals…
Impurity spin dynamics in 2D antiferromagnets and superconductors
Matthias Vojta, Chiranjeeb Buragohain, Subir Sachdev
We discuss the universal theory of localized impurities in the paramagnetic state of 2D antiferromagnets where the spin gap is assumed to be significantly smaller than a typical ex…
Magnetotransport in a model of a disordered strange metal
Aavishkar A. Patel, John McGreevy, Daniel P. Arovas +1
Despite much theoretical effort, there is no complete theory of the 'strange' metal state of the high temperature superconductors, and its linear-in-temperature, , resistivity.…
Dynamics and transport near quantum-critical points
Subir Sachdev
The physics of non-zero temperature dynamics and transport near quantum-critical points is discussed by a detailed study of the O(N)-symmetric, relativistic, quantum field theory o…
Conserved current correlators of conformal field theories in 2+1 dimensions
Yejin Huh, Philipp Strack, Subir Sachdev
We compute current correlators of the CP^{N-1} field theory in 2+1 dimensions, both at the critical point and in the phase with spontaneously broken SU(N) symmetry. Universal const…
Strange metals and the AdS/CFT correspondence
Subir Sachdev
I begin with a review of quantum impurity models in condensed matter physics, in which a localized spin degree of freedom is coupled to an interacting conformal field theory in d =…
Hidden orders and phase transitions for the fully packed quantum loop model on the triangular lattice
Xiaoxue Ran, Zheng Yan, Yan-Cheng Wang +5
Quantum loop and dimer models are prototypical correlated systems with local constraints, which are not only intimately connected to lattice gauge theories and topological orders b…
Absence of U(1) spin liquids in two dimensions
Igor F. Herbut, Babak H. Seradjeh, Subir Sachdev +1
Many popular models of fractionalized spin liquids contain neutral fermionic spinon excitations on a Fermi surface, carrying unit charges under a compact U(1) gauge force. We argue…
Holography of the Dirac Fluid in Graphene with two currents
Yunseok Seo, Geunho Song, Philip Kim +2
Recent experiments have uncovered evidence of the strongly coupled nature of the graphene: the Wiedemann-Franz law is violated by up to a factor of 20 near the charge neutral point…
Renormalization group analysis of quantum critical points in d-wave superconductors
Matthias Vojta, Ying Zhang, Subir Sachdev
We describe a search for renormalization group fixed points which control a second-order quantum phase transition between a d_{x^2-y^2} superconductor and some other superconductin…
Transformer Neural-Network Quantum States for lattice models of spins and fermions: Application to the Ancilla Layer Model
Riccardo Rende, Alexander Nikolaenko, Luciano Loris Viteritti +2
We introduce a variational wave function based on Neural-Network Quantum States (NQS) to study lattice systems whose local Hilbert space contains both spin and fermionic degrees of…
Are non-Fermi-liquids stable to Cooper pairing?
Max A. Metlitski, David F. Mross, Subir Sachdev +1
States of matter with a sharp Fermi-surface but no well-defined Landau quasiparticles arise in a number of physical systems. Examples include: quantum critical points a…
Quantum Criticality: competing ground states in low dimensions
Subir Sachdev
Small changes in an external parameter can often lead to dramatic qualitative changes in the lowest energy quantum mechanical ground state of a correlated electron system. In aniso…
Competing orders II: the doped quantum dimer model
Leon Balents, Lorenz Bartosch, Anton Burkov +2
We study the phases of doped spin S=1/2 quantum antiferromagnets on the square lattice, as they evolve from paramagnetic Mott insulators with valence bond solid (VBS) order at zero…
The planar pyrochlore antiferromagnet: A large-N analysis
Jean-Sebastien Bernier, Chung-Hou Chung, Yong Baek Kim +1
We study possible quantum phases of the Heisenberg antiferromagnet on the planar pyrochlore lattice, also known as the checkerboard lattice or the square lattice with crossings. It…
Quantum magnetism and criticality
Subir Sachdev
Magnetic insulators have proved to be fertile ground for studying new types of quantum many body states, and I survey recent experimental and theoretical examples. The insights and…
Tensor networks-a new tool for old problems
Subir Sachdev
A new renormalization group approach that maps lattice problems to tensor networks may hold the key to solving seemingly intractable models of strongly correlated systems in any di…
Hidden Fermi surfaces in compressible states of gauge-gravity duality
Liza Huijse, Subir Sachdev, Brian Swingle
General scaling arguments, and the behavior of the thermal entropy density, are shown to lead to an infrared metric holographically representing a compressible state with hidden Fe…
Quantum phase transitions of metals in two spatial dimensions: I. Ising-nematic order
Max A. Metlitski, Subir Sachdev
We present a renormalization group theory for the onset of Ising-nematic order in a Fermi liquid in two spatial dimensions. This is a quantum phase transition, driven by electron i…
Finite temperature dissipation and transport near quantum critical points
Subir Sachdev
I review a variety of model systems and their quantum critical points, motivated by recent experimental and theoretical developments. These are used to present a general discussion…
Radiation-Induced Magnetoresistance Oscillations in a 2D Electron Gas
Adam C. Durst, Subir Sachdev, N. Read +1
Recent measurements of a 2D electron gas subjected to microwave radiation reveal a magnetoresistance with an oscillatory dependence on the ratio of radiation frequency to cyclotron…
Conformal field theories at non-zero temperature: operator product expansions, Monte Carlo, and holography
Emanuel Katz, Subir Sachdev, Erik S. Sorensen +1
We compute the non-zero temperature conductivity of conserved flavor currents in conformal field theories (CFTs) in 2+1 spacetime dimensions. At frequencies much greater than the t…
Strong non-linear response of strange metals
Serhii Kryhin, Subir Sachdev, Pavel A. Volkov
We show that nonlinear transport responses in strange metals are strong, larger by a factor of than in Fermi liquids. Within the two-dimensional Yukawa-Sachdev-Ye-Kitaev mo…
Frustrated quantum Ising spins simulated by spinless bosons in a tilted lattice: from a quantum liquid to antiferromagnetic order
Susanne Pielawa, Erez Berg, Subir Sachdev
We study spinless bosons in a decorated square lattice with a near-diagonal tilt. The resonant subspace of the tilted Mott insulator is described by an effective Hamiltonian of fru…
Valence bond solid order near impurities in two-dimensional quantum antiferromagnets
Max A. Metlitski, Subir Sachdev
Recent scanning tunnelling microscopy (STM) experiments on underdoped cuprates have displayed modulations in the local electronic density of states which are centered on a Cu-O-Cu…
Quantum critical dynamics of the two-dimensional Bose gas
Subir Sachdev, Emily R. Dunkel
The dilute, two-dimensional Bose gas exhibits a novel regime of relaxational dynamics in the regime k_B T > |μ| where T is the absolute temperature and μis the chemical potential…
Finite temperature dynamics near quantum phase transitions
Subir Sachdev
We review the non-zero temperature relaxational dynamics of quantum systems near a zero temperature, second-order phase transition. We begin with the quantum Ising chain, for which…
Impurity induced spin texture in quantum critical 2D antiferromagnets
Kaj H. Hoglund, Anders W. Sandvik, Subir Sachdev
We describe the uniform and staggered magnetization distributions around a vacancy in a quantum critical two-dimensional S=1/2 antiferromagnet. The distributions are delocalized ac…
Quantum impurity dynamics in two-dimensional antiferromagnets and superconductors
Matthias Vojta, Chiranjeeb Buragohain, Subir Sachdev
We present the universal theory of arbitrary, localized impurities in a confining paramagnetic state of two-dimensional antiferromagnets with global SU(2) spin symmetry. The energy…
Fermi-surface reconstruction without symmetry breaking
Snir Gazit, Fakher F. Assaad, Subir Sachdev
We present a sign-problem free quantum Monte Carlo study of a model that exhibits quantum phase transitions without symmetry breaking and associated changes in the size of the Ferm…
Strange Metals in One Spatial Dimension
Rajesh Gopakumar, Akikazu Hashimoto, Igor R. Klebanov +2
We consider 1+1 dimensional SU(N) gauge theory coupled to a multiplet of massive Dirac fermions transforming in the adjoint representation of the gauge group. The only global symme…
Quantum phase transitions of correlated electrons in two dimensions
Subir Sachdev
We review the theories of a few quantum phase transitions in two-dimensional correlated electron systems and discuss their application to the cuprate high temperature superconducto…
Quantum criticality and black holes
Subir Sachdev, Markus Mueller
Many condensed matter experiments explore the finite temperature dynamics of systems near quantum critical points. Often, there are no well-defined quasiparticle excitations, and s…
Comment on "Critical spin dynamics of the 2D quantum Heisenberg antiferromagnets: Sr2CuO2Cl2 and Sr2Cu3O4Cl2"
Subir Sachdev, Oleg A. Starykh
We compare the neutron measurements of Kim et al. (cond-mat/0012239) on two-dimensional, S=1/2 antiferromagnets with the continuum quasiclassical theory of S. Sachdev and O.A. Star…
Strange metals and black holes: insights from the Sachdev-Ye-Kitaev model
Subir Sachdev
Complex many-particle quantum entanglement is a central theme in two distinct major topics in physics: the strange metal state found in numerous correlated electron compounds, and…
Electronic states near a quantum fluctuating point vortex in a d-wave superconductor: Dirac fermion theory
Predrag Nikolic, Subir Sachdev, Lorenz Bartosch
We introduce a simple model of the low energy electronic states in the vicinity of a vortex undergoing quantum zero-point motion in a d-wave superconductor. The vortex is treated a…
Depletion of the Bose-Einstein condensate in Bose-Fermi mixtures
Stephen Powell, Subir Sachdev, Hans Peter Buchler
We describe the properties of a mixture of fermionic and bosonic atoms, as they are tuned across a Feshbach resonance associated with a fermionic molecular state. Provided the numb…
A model of a Fermi liquid using gauge-gravity duality
Subir Sachdev
We use gauge-gravity duality to model the crossover from a conformal critical point to a confining Fermi liquid, driven by a change in fermion density. The short-distance conformal…
Quantum criticality beyond the Landau-Ginzburg-Wilson paradigm
T. Senthil, Leon Balents, Subir Sachdev +2
We present the critical theory of a number of zero temperature phase transitions of quantum antiferromagnets and interacting boson systems in two dimensions. The most important exa…
Deconfined quantum criticality of nodal -wave superconductivity, Néel order, and charge order on the square lattice at half-filling
Maine Christos, Henry Shackleton, Subir Sachdev +1
We consider a SU(2) lattice gauge theory on the square lattice, with a single fundamental complex fermion and a single fundamental complex boson on each lattice site. Projective sy…
Bond and Neel order and fractionalization in ground states of easy-plane antiferromagnets in two dimensions
Kwon Park, Subir Sachdev
We describe the zero temperature phases and phase boundaries of an effective lattice model for frustrated, easy-plane, spin S=1/2 quantum antiferromagnets. The model contains state…