Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Anushya Chandran"'
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043006 (2022)
We construct a family of three-body spin-1/2 Hamiltonians with a superextensive set of infinitely long-lived multimagnon states. A magnon in each such state carries either quasimomentum zero or fixed p_{0}≠0, and energy Ω. These multimagnon states
Externí odkaz:
https://doaj.org/article/e09dff41a47f4bc99f98c3a84a1a5c06
Publikováno v:
Physical Review Research, Vol 2, Iss 4, p 043305 (2020)
We present a general symmetry-based framework for obtaining many-body Hamiltonians with scarred eigenstates that do not obey the eigenstate thermalization hypothesis. Our models are derived from parent Hamiltonians with a non-Abelian (or q-deformed)
Externí odkaz:
https://doaj.org/article/99adcdea16ec49bb877f3705f4612ecd
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 032052 (2020)
Central spin models describe a variety of quantum systems in which a spin-1/2 qubit interacts with a bath of surrounding spins, as realized in quantum dots and defect centers in diamond. We show that the fully anisotropic central spin Hamiltonian wit
Externí odkaz:
https://doaj.org/article/eda45bce616d460ab86fdb06bdfa00aa
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033044 (2020)
Quantum many-body scar states are exceptional finite energy density eigenstates in an otherwise thermalizing system that do not satisfy the eigenstate thermalization hypothesis. We investigate the fate of exact many-body scar states under perturbatio
Externí odkaz:
https://doaj.org/article/1be882c4e2324c3c8b9e1375d51f9390
Publikováno v:
SciPost Physics, Vol 12, Iss 6, p 201 (2022)
The many-body localised (MBL) to thermal crossover observed in exact diagonalisation studies remains poorly understood as the accessible system sizes are too small to be in an asymptotic scaling regime. We develop a model of the crossover in short 1D
Externí odkaz:
https://doaj.org/article/6cb68c47313144b5b20c35801907fbab
Publikováno v:
SciPost Physics, Vol 12, Iss 3, p 103 (2022)
The eigenstate thermalisation hypothesis (ETH) is a statistical characterisation of eigen-energies, eigenstates and matrix elements of local operators in thermalising quantum systems. We develop an ETH-like ansatz of a partially thermalising system c
Externí odkaz:
https://doaj.org/article/8469fb57f09e45f2bc32e766302f2f08
Publikováno v:
Physical Review B. 106
Quasiperiodically driven fermionic systems can support topological phases not realized in equilibrium. The fermions are localized in the bulk, but support quantized energy currents at the edge. These phases were discovered through an abstract classif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6707e80ab7b7a86d02c0f239999da992
https://doi.org/10.1103/physrevb.106.144203
https://doi.org/10.1103/physrevb.106.144203
Publikováno v:
Physical Review Letters. 128
The striking nonlinear effects exhibited by cavity QED systems make them a powerful tool in modern condensed matter and atomic physics. A recently discovered example is the quantized pumping of energy into a cavity by a strongly-coupled, periodically
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9eda29fa2da9fb3be00343a1a450272e
https://doi.org/10.1103/physrevlett.128.183602
https://doi.org/10.1103/physrevlett.128.183602
Momentum space entanglement entropy probes quantum correlations in interacting fermionic phases. It is very sensitive to interactions, obeying volume-law scaling in general, while vanishing in the Fermi gas. We show that the R\'enyi entropy in moment
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cced697b40f5fa5544a53c1dd4f64690
http://arxiv.org/abs/2203.08154
http://arxiv.org/abs/2203.08154
Autor:
Philip Crowley, Anushya Chandran
The eigenstate thermalisation hypothesis (ETH) is a statistical characterisation of eigen-energies, eigenstates and matrix elements of local operators in thermalising quantum systems. We develop an ETH-like ansatz of a partially thermalising system c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1b4f00fb4bcc8f697443da5d01f3148
http://arxiv.org/abs/2104.03312
http://arxiv.org/abs/2104.03312