Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Ghosh, Anandamohan"'
Publikováno v:
Phys. Rev. B 109, 064206 (2024)
In various chaotic quantum many-body systems, the ground states show non-trivial athermal behavior despite the bulk states exhibiting thermalization. Such athermal states play a crucial role in quantum information theory and its applications. Moreove
Externí odkaz:
http://arxiv.org/abs/2311.10150
Publikováno v:
Phys. Rev. Lett. 131, 166401 (2023)
Unlike the well-known Mott's argument that extended and localized states should not coexist at the same energy in a generic random potential, we provide an example of a nearest-neighbor tight-binding disordered model which carries both localized and
Externí odkaz:
http://arxiv.org/abs/2305.02351
Autor:
Das, Adway Kumar, Ghosh, Anandamohan
Publikováno v:
Physical Review E 106, 064112 (2022)
Centrosymmetry often mediates Perfect State Transfer (PST) in various complex systems ranging from quantum wires to photosynthetic networks. We introduce the Deformed Centrosymmetric Ensemble (DCE) of random matrices, $H(\lambda) \equiv H_+ + \lambda
Externí odkaz:
http://arxiv.org/abs/2212.04682
Autor:
Das, Adway Kumar, Ghosh, Anandamohan
Publikováno v:
J. Stat. Mech. (2022) 063101
The competition between strength and correlation of coupling terms in a Hamiltonian defines numerous phenomenological models exhibiting spectral properties interpolating between those of Poisson (integrable) and Wigner-Dyson (chaotic) ensembles. It i
Externí odkaz:
http://arxiv.org/abs/2211.09338
Autor:
Das, Adway Kumar, Ghosh, Anandamohan
Publikováno v:
Phys. Rev. E 105, 054121, 12 May 2022
Matrix models showing chaotic-integrable transition in the spectral statistics are important for understanding Many Body Localization (MBL) in physical systems. One such example is the $\beta$-ensemble, known for its structural simplicity. However, e
Externí odkaz:
http://arxiv.org/abs/2112.11910
Autor:
Das, Adway Kumar, Ghosh, Anandamohan
Publikováno v:
2023 J. Phys. A: Math. Theor. 56 495003
We introduce a two-parameter ensemble of generalized $2\times 2$ real symmetric random matrices called the $\beta$-Rosenzweig-Porter ensemble (\brpe), parameterized by $\beta$, a fictitious inverse temperature of the analogous Coulomb gas model, and
Externí odkaz:
http://arxiv.org/abs/2010.16394
Autor:
Das, Adway Kumar, Ghosh, Anandamohan
Publikováno v:
2019 J. Phys. A: Math. Theor. 52 395001
The Nearest Neighbour Spacing (NNS) distribution can be computed for generalized symmetric 2x2 matrices having different variances in the diagonal and in the off-diagonal elements. Tuning the relative value of the variances we show that the distribut
Externí odkaz:
http://arxiv.org/abs/1906.01023
In the present work we investigate the stability of the k-essence models allowing upto quadratic terms of the kinetic energy. The system of field equations is written as an autonomous system in terms of dimensionless variables and the stability crite
Externí odkaz:
http://arxiv.org/abs/1904.10149
A comparative study of thawing and tracking models of dark energy is carried out with the help of a dynamical systems analysis. It is found that both of them have stable solutions which are consistent with the requirement of a dark energy. So none of
Externí odkaz:
http://arxiv.org/abs/1811.00736
Publikováno v:
In Journal of Theoretical Biology 21 November 2021 529
