Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Lazarides, Achilleas"'
Quantum reservoir computing (QRC) is a low-complexity learning paradigm that combines the inherent dynamics of input-driven many-body quantum systems with classical learning techniques for nonlinear temporal data processing. Optimizing the QRC proces
Externí odkaz:
http://arxiv.org/abs/2409.03665
Publikováno v:
Phys. Rev. B 110, 134205 (2024)
We study stability of localisation under periodic driving in many-body Stark systems. We find that localisation is stable except near special resonant frequencies, where resonances cause delocalisation. We provide approximate analytical arguments and
Externí odkaz:
http://arxiv.org/abs/2404.11649
Autor:
Lev, Yevgeny Bar, Lazarides, Achilleas
Discrete time crystalline (DTC) phases have attracted significant theoretical and experimental attention in the last few years. Such systems require a seemingly impossible combination of non-adiabatic driving and a finite-entropy long-time state, whi
Externí odkaz:
http://arxiv.org/abs/2403.01912
Autor:
Deger, Aydin, Lazarides, Achilleas
Publikováno v:
Phys. Rev. B 109, L220301 (2024)
Experiments in Rydberg atoms have recently found unusually slow decay from a small number of special initial states. We investigate the robustness of such long-lived states (LLS) by studying an ensemble of locally constrained random systems with tuna
Externí odkaz:
http://arxiv.org/abs/2309.11180
We prove that spin chains symmetric under a combination of mirror and spin-flip symmetries and with a nondegenerate spectrum show finite spin transport at zero total magnetization and infinite temperature. We demonstrate this numerically using two pr
Externí odkaz:
http://arxiv.org/abs/2208.13793
Publikováno v:
Phys. Rev. Lett. 129, 190601 (2022)
In a recent work [A. Deger et al., Phys. Rev. Lett. 129, 160601 (2022)] we have shown that kinetic constraints can completely arrest many-body chaos in the dynamics of a classical, deterministic, translationally-invariant spin system with the strengt
Externí odkaz:
http://arxiv.org/abs/2206.07724
Publikováno v:
Phys. Rev. Lett. 129, 160601 (2022)
We investigate the effect of kinetic constraints on classical many-body chaos in a translationally-invariant Heisenberg spin chain using a classical counterpart of the out-of-time-ordered correlator (OTOC). The strength of the constraint drives a 'dy
Externí odkaz:
http://arxiv.org/abs/2202.11726
Publikováno v:
Phys. Rev. B 103, 100204 (2021)
Motivated by the link between Anderson localisation on high-dimensional graphs and many-body localisation, we study the effect of periodic driving on Anderson localisation on random trees. The time dependence is eliminated in favour of an extra dimen
Externí odkaz:
http://arxiv.org/abs/2101.00018
Autor:
Roy, Sthitadhi, Lazarides, Achilleas
Publikováno v:
Phys. Rev. Research 2, 023159 (2020)
Quantum systems that violate the eigenstate thermalisation hypothesis thereby falling outside the paradigm of conventional statistical mechanics are of both intellectual and practical interest. We show that such a breaking of ergodicity may arise pur
Externí odkaz:
http://arxiv.org/abs/1912.06660
Publikováno v:
Phys. Rev. Research 2, 022002 (2020)
We investigate the conditions under which periodically driven quantum systems subject to dissipation exhibit a stable subharmonic response. Noting that coupling to a bath introduces not only cooling but also noise, we point out that a system subject
Externí odkaz:
http://arxiv.org/abs/1904.04820