24 citations · 159 across the 15 of their papers we have counts for
15 papers
Entanglement-limited linear response in fermionic systems
Hadi Cheraghi, Ali G. Moghaddam, Teemu Ojanen
We propose a general connection between entanglement-entropy scaling laws and the linear response functions of particle-conserving fermionic systems in their ground state. Specific…
Spin squeezing: Thermal behavior and distribution on excited states
Saeed Mahdavifar, Hadi Cheraghi, Kourosh Afrousheh
We investigate the spin-squeezing behavior under thermal effects in a one-dimensional transverse field XY model with spin-1/2. The exact solution of the model helps us to compute t…
Fisher zeroes and dynamical quantum phase transitions for two- and three-dimensional models
Tomasz Masłowski, Hadi Cheraghi, Jesko Sirker +1
Dynamical quantum phase transitions are non-analyticities in a dynamical free energy (or return rate) which occur at critical times. Although extensively studied in one dimension,…
Information propagation in one-dimensional XY- chains
Sasan Kheiri, Hadi Cheraghi, Saeed Mahdavifar +1
The bond-dependent Kitaev model offers a playground in which one can search for quantum spin liquids. In these Kitaev materials, a symmetric off-diagonal term emerges, hosting…
Quantum spin fluctuations in dynamical quantum phase transitions
Cheuk Yiu Wong, Hadi Cheraghi, Wing Chi Yu
Quantum phase transitions have long been studied in their relation to quantum fluctuations. These fluctuations can be quantified as the degree of spin squeezing in spin models, whe…
Information Trapping by Topologically Protected Edge States: Scrambling and the Butterfly Velocity
Martyna Sedlmayr, Hadi Cheraghi, Nicholas Sedlmayr
Topological insulators and superconductors have attracted considerable attention, and many different theoretical tools have been used to gain insight into their properties. Here we…
Dynamical Quantum Phase Transitions Following Double Quenches: Persistence of the Initial State vs Dynamical Phases
Hadi Cheraghi, Nicholas Sedlmayr
Dynamical quantum phase transitions can occur following quenches in quantum systems when the rate function, a dynamical analogue of the free energy, becomes non-analytic at critica…
Amplifying quantum correlations with quench dynamics in a quantum spin chain: Steady-states versus ground-states
Sasan Kheiri, Hadi Cheraghi, Saeed Mahdavifar
We analyze the behavior of steady-state quantum correlations (QCs) in the spin-1/2 transverse field XY chains analytically, in terms of quench dynamics at zero-temperature. We show…
Achieving spin-squeezed states by quench dynamics in a quantum chain
Hadi Cheraghi, Saeed Mahdavifar, Henrik Johannesson
We study the time evolution of spin squeezing in the one-dimensional spin-1/2 XY model subject to a sudden quantum quench of a transverse magnetic field. The initial state is selec…
Magnetic phase diagram of a spin-1/2 XXZ chain with modulated Dzyaloshinskii-Moriya interaction
G. I. Japaridze, H. Cheraghi, S. Mahdavifar
We consider the ground-state phase diagram of a one-dimensional spin-1/2 XXZ chain with spatially modulated Dzyaloshinskii-Moriya interaction in the presence of applied along with…
Dynamics of coherence: Maximal quantum Fisher information vs. Loschmidt echo
Hadi Cheraghi, Saeed Mahdavifar
We consider the dynamics of maximal quantum Fisher information (MQFI) after sudden quenches for the one-dimensional transverse-field Ising model. Our results show, the same as Losc…
Probing the Possibilities of Ergodicity in the 1D Spin-1/2 XY Chain with Quench Dynamics
H. Cheraghi, S. Mahdavifar
Ergodicity sits at the heart of the connection between statistical mechanics and dynamics of a physical system. By fixing the initial state of the system into the ground state of t…
String orders in the Luttinger liquid phase of one-dimensional spin-1/2 systems
Hadi Cheraghi, Majid Jafar Tafreshi, Saeed Mahdavifar
Luttinger liquid (LL) phase refers to a quantum phase which emerges in the ground state phase diagram of quite often low-dimensional quantum magnets as spin-1/2 XX, XYY and frustra…
Ineffectiveness of the Dzyaloshinskii-Moriya interaction in the dynamical quantum phase transition in the ITF model
H. Cheraghi, S. Mahdavifar
Quantum phase transition occurs at a quantum critical value of a control parameter such as the magnetic field in the Ising model in a transverse magnetic field (ITF). Recently, it…
Dynamical quantum correlations after sudden quenches
Utkarsh Mishra, Hadi Cheraghi, Saeed Mahdavifar +2
We employ the mean-field approach in the fermionic picture of the spin-1/2 XXZ chain to investigate the dynamics of bipartite quantum discord and concurrence under sudden quenching…