114 citations · 450 across the 25 of their papers we have counts for
25 papers
The two-particle density matrix of a Luttinger liquid
Harini Radhakrishnan, Matthias Thamm, Hatem Barghathi +2
Two-particle coherence is the first level of the reduced-density-matrix hierarchy that contains correlations inaccessible to single-particle observables, yet analytic two-particle…
Quantum simulation of Motzkin spin chain with Rydberg atoms
Kaustav Mukherjee, Hatem Barghathi, Adrian Del Maestro +1
Motzkin spin chain is a well-known mathematical model with connections to symmetry-protected topological phases, such as the Haldane phase, as well as to concepts in the AdS/CFT co…
Detection of a Rényi Index Dependent Transition in Entanglement Entropy Scaling
Hatem Barghathi, Adrian Del Maestro
The scaling of entanglement with subsystem size encodes key information about phases and criticality, but the von Neumann entropy is costly to access in experiments and simulations…
Berezinskii-Kosterlitz-Thouless Renormalization Group Flow at a Quantum Phase Transition
Matthias Thamm, Harini Radhakrishnan, Hatem Barghathi +4
We present a controlled numerical study of the Berezinskii-Kosterlitz-Thouless (BKT) transition in the one-dimensional Bose-Hubbard model at unit filling, providing evidence of the…
Disentangling the Physics of the Attractive Hubbard Model via the Accessible and Symmetry-Resolved Entanglement Entropies
Tong Shen, Hatem Barghathi, Adrian Del Maestro +1
The complicated ways in which electrons interact in many-body systems such as molecules and materials have long been viewed through the lens of local electron correlation and assoc…
A Scaling Function for the Particle Entanglement Entropy of Fermions
Harini Radhakrishnan, Matthias Thamm, Hatem Barghathi +2
Entanglement entropy under a particle bipartition provides complementary information to mode entanglement as it is sensitive to interactions and particle statistics at leading orde…
A Stable, Recursive Auxiliary Field Quantum Monte Carlo Algorithm in the Canonical Ensemble: Applications to Thermometry and the Hubbard Model
Tong Shen, Hatem Barghathi, Jiangyong Yu +2
Many experimentally-accessible, finite-sized interacting quantum systems are most appropriately described by the canonical ensemble of statistical mechanics. Conventional numerical…
One-particle entanglement for one dimensional spinless fermions after an interaction quantum quench
Matthias Thamm, Harini Radhakrishnan, Hatem Barghathi +2
Particle entanglement provides information on quantum correlations in systems of indistinguishable particles. Here, we study the one particle entanglement entropy for an integrable…
Measuring post-quench entanglement entropy through density correlations
Adrian Del Maestro, Hatem Barghathi, Bernd Rosenow
Following a sudden change of interactions in an integrable system of one-dimensional fermions, we analyze the dependence of the static structure factor on the observation time afte…
Balls and Walls: A Compact Unary Coding for Bosonic States
Hatem Barghathi, Caleb Usadi, Micah Beck +1
We introduce a unary coding of bosonic occupation states based on the famous "balls and walls" counting for the number of configurations of indistinguishable particles on d…
Theory of Non-Interacting Fermions and Bosons in the Canonical Ensemble
Hatem Barghathi, Jiangyong Yu, Adrian Del Maestro
We present a self-contained theory for the exact calculation of particle number counting statistics of non-interacting indistinguishable particles in the canonical ensemble. This g…
Equivalence of Spatial and Particle Entanglement Growth After a Quantum Quench
Adrian Del Maestro, Hatem Barghathi, Bernd Rosenow
We analyze fermions after an interaction quantum quench in one spatial dimension and study the growth of the steady state entanglement entropy density under either a spatial mode o…
Operationally accessible entanglement of one dimensional spinless fermions
Hatem Barghathi, Emanuel Casiano-Diaz, Adrian Del Maestro
For indistinguishable itinerant particles subject to a superselection rule fixing their total number, a portion of the entanglement entropy under a spatial bipartition of the groun…
Rényi generalization of the operational entanglement entropy
Hatem Barghathi, C. M. Herdman, Adrian Del Maestro
Operationally accessible entanglement in bipartite systems of indistinguishable particles could be reduced due to restrictions on the allowed local operations as a result of partic…
Extinction phase transitions in a model of ecological and evolutionary dynamics
Hatem Barghathi, Skye Tackkett, Thomas Vojta
We study the non-equilibrium phase transition between survival and extinction of spatially extended biological populations using an agent-based model. We especially focus on the ef…
Particle partition entanglement of one dimensional spinless fermions
Hatem Barghathi, Emanuel Casiano-Diaz, Adrian Del Maestro
We investigate the scaling of the Rényi entanglement entropies for a particle bipartition of interacting spinless fermions in one spatial dimension. In the Tomonaga-Luttinger liqui…
Contact process with temporal disorder
Hatem Barghathi, Jose A. Hoyos, Thomas Vojta
We investigate the influence of time-varying environmental noise, i.e., temporal disorder, on the nonequilibrium phase transition of the contact process. Combining a real-time reno…
Random field disorder at an absorbing state transition in one and two dimensions
Hatem Barghathi, Thomas Vojta
We investigate the behavior of nonequilibrium phase transitions under the influence of disorder that locally breaks the symmetry between two symmetrical macroscopic absorbing state…
Enhanced rare region effects in the contact process with long-range correlated disorder
Ahmed K. Ibrahim, Hatem Barghathi, Thomas Vojta
We investigate the nonequilibrium phase transition in the disordered contact process in the presence of long-range spatial disorder correlations. These correlations greatly increas…
Strong-randomness phenomena in quantum Ashkin-Teller models
Hatem Barghathi, Fawaz Hrahsheh, José A. Hoyos +2
The -color quantum Ashkin-Teller spin chain is a prototypical model for the study of strong-randomness phenomena at first-order and continuous quantum phase transitions. In this…
Phase Transitions on Random Lattices: How Random is Topological Disorder?
Hatem Barghathi, Thomas Vojta
We study the effects of topological (connectivity) disorder on phase transitions. We identify a broad class of random lattices whose disorder fluctuations decay much faster with in…
Contact process on generalized Fibonacci chains: infinite-modulation criticality and double-log periodic oscillations
Hatem Barghathi, David Nozadze, Thomas Vojta
We study the nonequilibrium phase transition of the contact process with aperiodic transition rates using a real-space renormalization group as well as Monte-Carlo simulations. The…
Random fields at a nonequilibrium phase transition
Hatem Barghathi, Thomas Vojta
We investigate nonequilibrium phase transitions in the presence of disorder that locally breaks the symmetry between two equivalent macroscopic states. In low-dimensional equilibri…
Infinite-randomness criticality in a randomly layered Heisenberg magnet
Fawaz Hrahsheh, Hatem Barghathi, Thomas Vojta
We study the ferromagnetic phase transition in a randomly layered Heisenberg magnet using large-scale Monte-Carlo simulations. Our results provide numerical evidence for the infini…