179 citations · 1.7k across the 36 of their papers we have counts for
22 papers · 1 filter
Ergodicity breaking and deviation from Eigenstate Thermalisation in relativistic QFT
Miha Srdinšek, Tomaž Prosen, Spyros Sotiriadis
The validity of the ergodic hypothesis in quantum systems can be rephrased in the form of the eigenstate thermalisation hypothesis (ETH), a set of statistical properties for the ma…
Breaking of Huygens-Fresnel principle in inhomogeneous Tomonaga-Luttinger liquids
Marek Gluza, Per Moosavi, Spyros Sotiriadis
Tomonaga-Luttinger liquids (TLLs) can be used to effectively describe one-dimensional quantum many-body systems such as ultracold atoms, charges in nanowires, superconducting circu…
Signatures of Chaos in Non-integrable Models of Quantum Field Theory
Miha Srdinsek, Tomaz Prosen, Spyros Sotiriadis
We study signatures of quantum chaos in (1+1)D Quantum Field Theory (QFT) models. Our analysis is based on the method of Hamiltonian truncation, a numerical approach for the constr…
Non-Equilibrium Steady State of the Lieb-Liniger model: multiple-integral representation of the time evolved many-body wave-function
Spyros Sotiriadis
We continue our study of the emergence of Non-Equilibrium Steady States in quantum integrable models focusing on the expansion of a Lieb-Liniger gas for arbitrary repulsive interac…
Non-Equilibrium Steady State of the Lieb-Liniger model: exact treatment of the Tonks Girardeau limit
Spyros Sotiriadis
Aiming at studying the emergence of Non-Equilibrium Steady States (NESS) in quantum integrable models by means of an exact analytical method, we focus on the Tonks-Girardeau or har…
Out-of-horizon correlations following a quench in a relativistic quantum field theory
Ivan Kukuljan, Spyros Sotiriadis, Gabor Takacs
One of the manifestations of relativistic invariance in non-equilibrium quantum field theory is the "horizon effect" a.k.a. light-cone spreading of correlations: starting from an i…
Correlation Functions of the Quantum Sine-Gordon Model in and out of Equilibrium
Ivan Kukuljan, Spyros Sotiriadis, Gabor Takacs
Complete information on the equilibrium behaviour and dynamics of a quantum field theory (QFT) is provided by multipoint correlation functions. However, their theoretical calculati…
Non-equilibrium quantum transport in presence of a defect: the non-interacting case
Marko Ljubotina, Spyros Sotiriadis, Tomaž Prosen
We study quantum transport after an inhomogeneous quantum quench in a free fermion lattice system in the presence of a localised defect. Using a new rigorous analytical approach fo…
Quenches from gaussian bosons to Tonks-Girardeau gas: stationary states and effects of a confining potential
Alvise Bastianello, Mario Collura, Spyros Sotiriadis
We consider the general problem of quenching an interacting Bose gas from the noninteracting regime to the strong repulsive case described by the Tonks-Girardeau limit, with the in…
Equilibration in one-dimensional quantum hydrodynamic systems
Spyros Sotiriadis
We study quench dynamics and equilibration in one-dimensional quantum hydrodynamics, which provides effective descriptions of the density and velocity fields in gapless quantum gas…
Quasi locality of the GGE in interacting-to-free quenches in relativistic field theories
Alvise Bastianello, Spyros Sotiriadis
We study the quench dynamics in continuous relativistic quantum field theory, more specifically the locality properties of the large time stationary state. After a quantum quench i…
Cluster expansion for ground states of local Hamiltonians
Alvise Bastianello, Spyros Sotiriadis
A central problem in many-body quantum physics is the determination of the ground state of a thermodynamically large physical system. We construct a cluster expansion for ground st…
Initial states in integrable quantum field theory quenches from an integral equation hierarchy
D. X. Horvath, S. Sotiriadis, G. Takacs
We consider the problem of determining the initial state of integrable quantum field theory quenches in terms of the post-quench eigenstates. The corresponding overlaps are a funda…
Memory-preserving equilibration after a quantum quench in a 1d critical model
Spyros Sotiriadis
One of the fundamental principles of statistical physics is that only partial information about a system's state is required for its macroscopic description. This is not only true…
Probing Klein tunneling through quantum quenches
Leda Bucciantini, Spyros Sotiriadis, Tommaso Macrì
We study the interplay between an inhomogeneous quantum quench of the external potential in a system of relativistic fermions in one dimension and the well-known Klein tunneling. W…
Quench echo and work statistics in integrable quantum field theories
Tamas Palmai, Spyros Sotiriadis
We propose a boundary thermodynamic Bethe ansatz calculation technique to obtain the Loschmidt echo and the statistics of the work done when a global quantum quench is performed on…
Validity of the GGE for quantum quenches from interacting to noninteracting models
Spyros Sotiriadis, Pasquale Calabrese
In the majority of the analytical verifications of the conjecture that the Generalised Gibbs Ensemble describes the large time asymptotics of local observables in quantum quench pr…
Boundary State in an Integrable Quantum Field Theory Out of Equilibrium
Spyros Sotiriadis, Gabor Takacs, Giuseppe Mussardo
We study a quantum quench of the mass and the interaction in the Sinh-Gordon model starting from a large initial mass and zero initial coupling. Our focus is on the determination o…
Statistics of the work done by splitting a one-dimensional quasi-condensate
Spyros Sotiriadis, Andrea Gambassi, Alessandro Silva
Motivated by experiments on splitting one-dimensional quasi-condensates, we study the statistics of the work done by a quantum quench in a bosonic system. We discuss the general fe…
Zamolodchikov-Faddeev Algebra and Quantum Quenches in Integrable Field Theories
Spyros Sotiriadis, Davide Fioretto, Giuseppe Mussardo
We analyze quantum quenches in integrable models and in particular the determination of the initial state in the basis of eigenstates of the post-quench hamiltonian. This leads us…
Quantum Quench from a Thermal Initial State
Spyros Sotiriadis, Pasquale Calabrese, John Cardy
We consider a quantum quench in a system of free bosons, starting from a thermal initial state. As in the case where the system is initially in the ground state, any finite subsyst…
Inhomogeneous Quantum Quenches
Spyros Sotiriadis, John Cardy
We study the problem of a quantum quench in which the initial state is the ground state of an inhomogeneous hamiltonian, in two different models, conformal field theory and ordinar…