Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Vipin Kerala Varma"'
Autor:
J. J. Mendoza-Arenas, John Goold, Marko Žnidarič, Vipin Kerala Varma, Stephen R. Clark, Antonello Scardicchio
Publikováno v:
Physical Review B
Mendoza-Arenas, J J, Žnidarič, M, Varma, V K, Goold, J, Clark, S R & Scardicchio, A 2019, ' Asymmetry in energy versus spin transport in certain interacting, disordered systems ', Physical Review B, vol. 99, no. 9, 094435 . https://doi.org/10.1103/PhysRevB.99.094435
Mendoza-Arenas, J J, Žnidarič, M, Varma, V K, Goold, J, Clark, S R & Scardicchio, A 2019, ' Asymmetry in energy versus spin transport in certain interacting, disordered systems ', Physical Review B, vol. 99, no. 9, 094435 . https://doi.org/10.1103/PhysRevB.99.094435
We study energy transport in XXZ spin chains driven to nonequilibrium configurations by thermal reservoirs of different temperatures at the boundaries. We discuss the transition between diffusive and subdiffusive transport regimes in sectors of zero
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a521d8264dfbb7f5cca2f14a392cfddd
https://hdl.handle.net/21.11116/0000-0003-5D4C-121.11116/0000-0003-5D4E-F21.11116/0000-0003-5D4F-E
https://hdl.handle.net/21.11116/0000-0003-5D4C-121.11116/0000-0003-5D4E-F21.11116/0000-0003-5D4F-E
We compute and compare the decay lengths of several correlation functions and effective coupling constants in the many-body localized (MBL) phase. To this end, we consider the distribution of the logarithms of these couplings and correlators: in each
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67bc7bb45b2d2c04b11cc05a51da2af0
http://arxiv.org/abs/1901.02902
http://arxiv.org/abs/1901.02902
Autor:
Marko Žnidarič, Vipin Kerala Varma
Publikováno v:
Physical Review B
We study high-temperature magnetization transport in a many-body spin-1/2 chain with on-site quasiperiodic potential governed by the Fibonacci rule. In the absence of interactions it is known that the system is critical with the transport described b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66b73cd897f3eeb10a2d96b0ca1ae0e7
Publikováno v:
Physical Review B. 98
We study magnetization transport in anisotropic spin-$1/2$ chains governed by the integrable XXZ model with and without integrability-breaking perturbations at high temperatures ($T\to \infty$) using a hybrid approach that combines exact sum-rules wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cec076d424970bce8086ff00348e81b8
https://doi.org/10.1103/physrevb.98.054415
https://doi.org/10.1103/physrevb.98.054415
Autor:
R. J. Sánchez, Vipin Kerala Varma
Publikováno v:
Physical Review B. 96
We revisit the subtelties of computing the high temperature spin stiffness $D$ of the spin-$1/2$ XXZ chain using exact diagonalization to analyze its dependence on system symmetries and ensemble. Within the canonical ensemble and for states with zero
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76291b49ef37d33805a620e53dbfd0bf
https://doi.org/10.1103/physrevb.96.245117
https://doi.org/10.1103/physrevb.96.245117
Publikováno v:
Physical review, vol. 96, no. 3, pp. 032130-1-032130-11, 2017.
Physical Review E
Physical Review E
We investigate the nonequilibrium response of quasiperiodic systems to boundary driving. In particular we focus on the Aubry-Andr\'e-Harper model at its metal-insulator transition and the diagonal Fibonacci model. We find that opening the system at t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f38acb1d59903cc844529a3be420f26c
http://arxiv.org/abs/1703.05844
http://arxiv.org/abs/1703.05844
Autor:
Vipin Kerala Varma, Sebastiano Pilati
Publikováno v:
Physical Review A. 95
We investigate the zero-temperature metal-insulator transition in a one-dimensional two-component Fermi gas in the presence of a quasi-periodic potential resulting from the superposition of two optical lattices of equal intensity but incommensurate p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1248a1620bd2fa0d2eb4ba5e88a2a4ee
https://doi.org/10.1103/physreva.95.013613
https://doi.org/10.1103/physreva.95.013613
Publikováno v:
Computer Physics Communications, 235, 477-488. Elsevier
We have developed an application and implemented parallel algorithms in order to provide a computational framework suitable for massively parallel supercomputers to study the unitary dynamics of quantum systems. We use renowned parallel libraries suc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5679ad6e5c91efa767460e9586ca0f1
We investigate the von Neumann entanglement entropy and Schmidt gap in the ground state of the Kitaev model on the honeycomb lattice for square and cylindrical subsystems. We find that, for both the subsystems, the free-fermionic contribution to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce5fb50204eb7c3572c0556f4c1b1fbd
http://arxiv.org/abs/1601.01695
http://arxiv.org/abs/1601.01695
We study the ground state conduction properties of noninteracting electrons in aperiodic but non-random one-dimensional models with chiral symmetry, and make comparisons against Anderson models with non-deterministic disorder. The first model we cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7634bc02ef476707d38e30e8e5983779