Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Bharath, H. M."'
Autor:
Scherg, Sebastian, Kohlert, Thomas, Sala, Pablo, Pollmann, Frank, Bharath, H. M., Bloch, Immanuel, Aidelsburger, Monika
Publikováno v:
Nat Commun 12, 4490 (2021)
The thermalization of isolated quantum many-body systems is deeply related to fundamental questions of quantum information theory. While integrable or many-body localized systems display non-ergodic behavior due to extensively many conserved quantiti
Externí odkaz:
http://arxiv.org/abs/2010.12965
Autor:
Blekherman, Grigoriy, Bharath, H. M.
Publikováno v:
Mathematical Programming (2020)
Quantum states are represented by positive semidefinite Hermitian operators with unit trace, known as density matrices. An important subset of quantum states is that of separable states, the complement of which is the subset of \textit{entangled} sta
Externí odkaz:
http://arxiv.org/abs/1904.00072
Publikováno v:
Phys. Rev. A 98, 031601 (2018)
Staircases in response functions are associated with physically observable quantities that respond discretely to continuous tuning of a control parameter. A well-known example is the quantization of the Hall conductivity in two dimensional electron g
Externí odkaz:
http://arxiv.org/abs/1804.03745
Publikováno v:
Phys. Rev. Lett. 123, 173202 (2019)
Non-Abelian and non-adiabatic variants of Berry's geometric phase have been pivotal in the recent advances in fault tolerant quantum computation gates, while Berry's phase itself is at the heart of the study of topological phases of matter. The geome
Externí odkaz:
http://arxiv.org/abs/1801.00586
Autor:
Bharath, H. M.
Publikováno v:
Journal of Mathematical Physics 59, 062105 (2018)
The expectation values of the first and second moments of the quantum mechanical spin operator can be used to define a spin vector and spin fluctuation tensor, respectively. The former is a vector inside the unit ball in three space, while the latter
Externí odkaz:
http://arxiv.org/abs/1702.08564
Publikováno v:
Phys. Rev. Lett. 116, 155301 (2016)
We observe power-law scaling of the temporal onset of excitations with quench speed in the neighborhood of the quantum phase transition between the polar and broken-axisymmetry phases in a small spin-1 ferromagnetic Bose-Einstein condensate. As the s
Externí odkaz:
http://arxiv.org/abs/1512.06914
Spontaneous symmetry breaking occurs in a physical system whenever the ground state does not share the symmetry of the underlying theory, e.g., the Hamiltonian. It gives rise to massless Nambu-Goldstone modes and massive Anderson-Higgs modes. These m
Externí odkaz:
http://arxiv.org/abs/1512.06766
Autor:
Bharath, H. M., Ghosh, Saikat
We explore the role of $\textit{collective measurements}$ on precision in estimation of a single parameter. Collective measurements are represented by observables which commute with all permutations of the probe particles. We show that with this cons
Externí odkaz:
http://arxiv.org/abs/1411.5090
Autor:
Bharath, H. M., Ravishankar, V.
Description of nonclassicality of states has hitherto been through violation of Bell inequality and non-separability, with the latter being a stronger constraint. In this paper, we show that this can be further sharpened, by introducing the concept o
Externí odkaz:
http://arxiv.org/abs/1401.5129
Autor:
Bharath, H. M., Ghosh, Saikat
A formulation towards quantifying resource count used in a measurement, that is independent of the model of the measurement dynamics(Quantum/Classical), is considered. For any general measurement with $(M+1)$ discrete outcomes, it is found that there
Externí odkaz:
http://arxiv.org/abs/1308.3833