Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Zadnik, Lenart"'
Integrability is an exceptional property believed to hold only for systems with fine-tuned parameters. Contrary, we explicitly show that in homogeneous nearest-neighbor qubit circuits with a U(1) symmetry, i.e., circuits that repeatedly apply the sam
Externí odkaz:
http://arxiv.org/abs/2410.06760
Introducing a class of SU(2) invariant quantum unitary circuits generating chiral transport, we examine the role of broken space-reflection and time-reversal symmetries on spin transport properties. Upon adjusting parameters of local unitary gates, t
Externí odkaz:
http://arxiv.org/abs/2406.01571
Autor:
Zadnik, Lenart, Garrahan, Juan P.
With the aim to understand the role of the constraints in the thermalisation of quantum systems, we study the dynamics of a family of kinetically constrained models arising through duality from the XXZ spin chain. We find that integrable and noninteg
Externí odkaz:
http://arxiv.org/abs/2304.10394
Publikováno v:
Phys. Rev. B 109, 115117 (2024)
We consider nonequilibrium time evolution in quantum spin chains after a global quench. Usually a nonequilibium quantum many-body system locally relaxes to a (generalised) Gibbs ensemble built from conserved operators with quasilocal densities. Here
Externí odkaz:
http://arxiv.org/abs/2205.02221
Publikováno v:
J. Phys. A: Math. Theor. (2022)
One of the features of many-body quantum systems with Hilbert-space fragmentation is the existence of stationary states manifesting quantum jamming. It was recently shown that these are "states with memory", in which, e.g., measuring a localised obse
Externí odkaz:
http://arxiv.org/abs/2111.06325
A quantum jammed state can be seen as a state where the phase space available to particles shrinks to zero, an interpretation quite accurate in integrable systems, where stable quasiparticles scatter elastically. We consider the integrable dual folde
Externí odkaz:
http://arxiv.org/abs/2108.03230
Publikováno v:
SciPost Phys. 10, 099 (2021)
We study the (dual) folded spin-1/2 XXZ model in the thermodynamic limit. We focus, in particular, on a class of local macrostates that includes Gibbs ensembles. We develop a thermodynamic Bethe Ansatz description and work out generalised hydrodynami
Externí odkaz:
http://arxiv.org/abs/2011.01159
Autor:
Zadnik, Lenart, Fagotti, Maurizio
Publikováno v:
SciPost Phys. Core 4, 010 (2021)
We study an effective Hamiltonian generating time evolution of states on intermediate time scales in the strong-coupling limit of the spin-1/2 XXZ model. To leading order, it describes an integrable model with local interactions. We solve it complete
Externí odkaz:
http://arxiv.org/abs/2009.04995
Publikováno v:
SciPost Phys. 9, 003 (2020)
Dynamical response functions are standard tools for probing local physics near the equilibrium. They provide information about relaxation properties after the equilibrium state is weakly perturbed. In this paper we focus on systems which break the as
Externí odkaz:
http://arxiv.org/abs/2003.01035
Publikováno v:
Phys. Rev. Lett. 124, 160403 (2020)
We investigate a dissipatively driven XYZ spin-1/2 chain in the Zeno limit of strong dissipation, described by Lindblad master equation. The nonequilibrium steady state is expressed in terms of a matrix product ansatz using novel site-dependent Lax o
Externí odkaz:
http://arxiv.org/abs/1912.03282