165 citations · 1.9k across the 79 of their papers we have counts for
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Crossover from Quantum Chaos to a Reversed Quantum Disentangled Liquid in a Disorder-Free Spin Ladder
Hanieh Najafzadeh, Abdollah Langari
The mechanisms by which isolated interacting quantum systems evade thermalization extend beyond disorder-induced many-body localization, encompassing a growing class of interaction…
Anti Kibble-Zurek behavior in the quantum XY spin-1/2 chain driven by correlated noisy magnetic field and anisotropy
S. Sadeghizade, R. Jafari, A. Langari
In the non-adiabatic dynamics across a quantum phase transition, the Kibble-Zurek paradigm describes that the average number of topological defects is suppressed as a universal pow…
Competition of long-range interactions and noise at ramped quench dynamical quantum phase transition: The case of the long-range pairing Kitaev chain
R. Baghran, R. Jafari, A. Langari
The nonequilibrium dynamics of long-range pairing Kitaev model with noiseless/noisy linear time dependent chemical potential, is investigated in the frame work of dynamical quantum…
Nonlinear response of the Kitaev honeycomb lattice model in a weak magnetic field
M. Kazem Negahdari, Abdollah Langari
We investigate the nonlinear response of the Kitaev honeycomb lattice model in a weak magnetic field using the theory of two-dimensional coherent spectroscopy. We observe that at t…
Dynamical Topological Quantum Phase Transitions at Criticality
M. Sadrzadeh, R. Jafari, A. Langari
The nonequilibrium dynamics of two dimensional Su-Schrieffer-Heeger model, in the presence of staggered chemical potential, is investigated using the notion of dynamical quantum ph…
Hybrid topological magnon-phonon modes in honeycomb and kagome lattices
Bahman Sheikhi, Mehdi Kargarian, Abdollah Langari
Magnons and phonons are two fundamental neutral excitations of magnetically ordered materials which can significantly dominate the low-energy thermal properties. In this work we st…
Homogeneous Floquet time crystal from weak ergodicity breaking
H. Yarloo, A. Emami Kopaei, A. Langari
Recent works on observation of discrete time-crystalline signatures throw up major puzzles on the necessity of localization for stabilizing such out-of-equilibrium phases. Motivate…
Phase diagram and thermal Hall conductivity of spin-liquid Kekulé-Kitaev model
Fatemeh Mirmojarabian, Mehdi Kargarian, Abdollah Langari
In this work we study the phase diagram of Kekulé-Kitaev model. The model is defined on a honeycomb lattice with bond dependent anisotropic exchange interactions making it exactly…
Quantum phase diagram of two-dimensional transverse field Ising model: unconstrained tree tensor network and mapping analysis
M. Sadrzadeh, R. Haghshenas, A. Langari
We investigate the ground-state phase diagram of the frustrated transverse field Ising (TFI) model on the checkerboard lattice (CL), which consists of Néel, collinear, quantum para…
Emergent statistical bubble localization in a Z2 lattice gauge theory
H. Yarloo, M. Mohseni-Rajaee, A. Langari
We introduce a clean cluster spin chain coupled to fully interacting spinless fermions, forming an unconstrained Z2 lattice gauge theory (LGT) which possesses dynamical proximity e…
Infinite Projected Entangled-Pair State algorithm for ruby and triangle-honeycomb lattices
Saeed S. Jahromi, Roman Orus, Mehdi Kargarian +1
The infinite Projected Entangled-Pair State (iPEPS) algorithm is one of the most efficient techniques for studying the ground-state properties of two-dimensional quantum lattice Ha…
Emergence of string-valence bond solid state in the frustrated transverse field Ising model on the square lattice
M. Sadrzadeh, R. Haghshenas, S. S. Jahromi +1
We investigate the ground state nature of the transverse field Ising model on the square lattice at the highly frustrated point . At zero field, the model ha…
Topological spin liquids in the ruby lattice with anisotropic Kitaev interactions
Saeed S. Jahromi, Mehdi Kargarian, S. Farhad Masoudi +1
The ruby lattice is a four-valent lattice interpolating between honeycomb and triangular lattices. In this work we investigate the topological spin-liquid phases of a spin Hamilton…
Full characterization of a spin liquid phase: from topological entropy to robustness and braid statistics
Saeed S. Jahromi, Abdollah Langari
We use the topological entanglement entropy (TEE) as an efficient tool to fully characterize the Abelian phase of a spin liquid emerging as the g…
Topological phases of the compass ladder model
R. Haghshenas, A. Langari, A. T. Rezakhani
We characterize phases of the compass ladder model by using degenerate perturbation theory, symmetry fractionalization, and numerical techniques. Through degenerate perturbation th…
Quantum phase transition as an interplay of Kitaev and Ising interactions
A. Langari, A. Mohammad-Aghaei, R. Haghshenas
We study the interplay between the Kitaev and Ising interactions on both ladder and two dimensional lattices. We show that the ground state of the Kitaev ladder is a symmetry-prote…
Symmetry fractionalization: Symmetry-protected topological phases of the bond-alternating spin- Heisenberg chain
R. Haghshenas, A. Langari, A. T. Rezakhani
We study different phases of the one-dimensional bond-alternating spin- Heisenberg model by using the symmetry fractionalization mechanism. We employ the infinite matrix-produ…
Phase diagram of J1-J2 transverse field Ising model on the checkerboard lattice: a plaquette-operator approach
M. Sadrzadeh, A. Langari
We study the effect of quantum fluctuations by means of a transverse magnetic field () on the antiferromagnetic Ising model on the checkerboard lattice, the two dimens…
Thermal conductivity of anisotropic spin - 1/2 two leg ladder:Green's function approach
Hamed Rezania, Abdollah Langari, Paul H. M. van Loosdrecht +1
We study the thermal transport of a spin-1/2 two leg antiferromagnetic ladder in the direction of legs. The possible effect of spin-orbit coupling and crystalline electric field ar…
Ground-state fidelity of the spin-1 Heisenberg chain with single ion anisotropy: quantum renormalization group and exact diagonalization approaches
A. Langari, F. Pollmann, M. Siahatgar
We study the phase diagram of the anisotropic spin-1 Heisenberg chain with single ion anisotropy (D) using a ground-state fidelity approach. The ground-state fidelity and its corre…
Quantum critical phase diagram of bond alternating Ising model with Dzyaloshinskii-Moriya interaction: signature of ground state fidelity
N. Amiri, A. Langari
We present the zero temperature phase diagram of the bond alternating Ising chain in the presence of Dzyaloshinskii-Moriya interaction. An abrupt change in ground state fidelity is…
Unusual magnetic phases in the strong interaction limit of two-dimensional topological band insulators in transition metal oxides
Mehdi Kargarian, Abdollah Langari, Gregory A. Fiete
The expected phenomenology of non-interacting topological band insulators (TBI) is now largely theoretically understood. However, the fate of TBIs in the presence of interactions r…
Ground state factorization of heterogeneous spin models in magnetic fields
J. Abouie, M. Rezai, A. Langari
The exact factorized ground state of a heterogeneous (ferrimagnetic) spin model which is composed of two spins () has been presented in detail. The Hamiltonian is not necessa…
Quantum phase transitions in the Kondo-necklace model: Perturbative continuous unitary transformation approach
S. Hemmatiyan, M. Rahimi Movassagh, N. Ghassemi +3
The Kondo-necklace model can describe magnetic low-energy limit of strongly correlated heavy fermion materials. There exist multiple energy scales in this model corresponding to ea…