Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Nandy, Sourav"'
We investigate chains of interacting spinless fermions subject to a finite external field $F$ (also called Stark chains) and focus on the regime where the charge thermalization follows the subdiffusive hydrodynamics. First, we study reduced models co
Externí odkaz:
http://arxiv.org/abs/2403.18906
Autor:
Kraft, Markus, Richter, Jonas, Jin, Fengping, Nandy, Sourav, Herbrych, Jacek, Michielsen, Kristel, De Raedt, Hans, Gemmer, Jochen, Steinigeweg, Robin
Publikováno v:
Phys. Rev. Research 6, 023251 (2024)
We investigate the Lindblad equation in the context of boundary-driven magnetization transport in spin-$1/2$ chains. Our central question is whether the nonequilibrium steady state of the open system, including its buildup in time, can be described o
Externí odkaz:
http://arxiv.org/abs/2402.18177
Publikováno v:
Phys. Rev. Research 6, 023160 (2024)
Reconstructing Hamiltonians from local measurements is key to enabling reliable quantum simulation: both validating the implemented model, and identifying any left-over terms with sufficient precision is a problem of increasing importance. Here we pr
Externí odkaz:
http://arxiv.org/abs/2308.08608
Publikováno v:
Phys. Rev. B 108, 214430 (2023)
We study a one-dimensional spin-$1/2$ model with three-spin interactions and a transverse magnetic field $h$. The model has a $Z_2 \times Z_2$ symmetry, and a duality between $h$ and $1/h$. The self-dual point at $h=1$ is a quantum critical point wit
Externí odkaz:
http://arxiv.org/abs/2307.11161
Publikováno v:
J. Phys.: Condens. Matter 36, 155601 (2024)
Scar eigenstates in a many-body system refers to a small subset of non-thermal finite energy density eigenstates embedded into an otherwise thermal spectrum. This novel non-thermal behaviour has been seen in recent experiments simulating a one-dimens
Externí odkaz:
http://arxiv.org/abs/2305.13322
Autor:
Heitmann, Tjark, Richter, Jonas, Jin, Fengping, Nandy, Sourav, Lenarčič, Zala, Herbrych, Jacek, Michielsen, Kristel, De Raedt, Hans, Gemmer, Jochen, Steinigeweg, Robin
State-of-the-art approaches to extract transport coefficients of many-body quantum systems broadly fall into two categories: (i) they target the linear-response regime in terms of equilibrium correlation functions of the closed system; or (ii) they c
Externí odkaz:
http://arxiv.org/abs/2303.00430
Publikováno v:
Phys. Rev. B 103, 085105 (2021)
Many-body localization is a fascinating theoretical concept describing the intricate interplay of quantum interference, i.e. localization, with many-body interaction induced dephasing. Numerous computational tests and also several experiments have be
Externí odkaz:
http://arxiv.org/abs/2010.07919
Publikováno v:
Phys. Rev. B 101, 245107 (2020)
The presence of quantum scars, athermal eigenstates of a many-body Hamiltonian with finite energy density, leads to absence of ergodicity and long-time coherent dynamics in closed quantum systems starting from simple initial states. Such non-ergodic
Externí odkaz:
http://arxiv.org/abs/1907.08212
Publikováno v:
Phys. Rev. B 100, 085134 (2019)
We study transport across ballistic junctions of materials which host pseudospin-one fermions as emergent low-energy quasiparticles. The effective low-energy Hamiltonians of such fermions are described by integer spin Weyl models. We show that curren
Externí odkaz:
http://arxiv.org/abs/1902.04175
Publikováno v:
Phys. Rev. B 98, 245144 (2018)
Driven many-body quantum systems where some parameter in the Hamiltonian is varied quasiperiodically in time may exhibit nonequilibrium steady states that are qualitatively different from their periodically driven counterparts. Here we consider a pro
Externí odkaz:
http://arxiv.org/abs/1810.07833