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pro vyhledávání: '"Jha, Rishabh"'
The question of thermalization of a closed quantum systems is of central interest in non-equilibrium quantum many-body physics. Here we present one such study analyzing the dynamics in a closed coupled Majorana SYK system. We have a large-$q$ SYK mod
Externí odkaz:
http://arxiv.org/abs/2411.12421
We present a functional-based approach to compute thermal expectation values for actions expressed in the $G-\Sigma$ formalism, applicable to any time sequence ordering. Utilizing this framework, we analyze the linear response to an electric field in
Externí odkaz:
http://arxiv.org/abs/2407.20733
Autor:
Menzler, Heiko Georg, Jha, Rishabh
Publikováno v:
Phys. Rev. B 110, 125137 (2024)
Krylov complexity has recently gained attention where the growth of operator complexity in time is measured in terms of the off-diagonal operator Lanczos coefficients. The operator Lanczos algorithm reduces the problem of complexity growth to a singl
Externí odkaz:
http://arxiv.org/abs/2403.14384
Publikováno v:
Journal of Physics: Condensed Matter, Volume 36, Number 49, 495601 (2024)
It has been known that the large-$q$ complex SYK model falls under the same universality class as that of van der Waals (mean-field) and saturates the Maldacena-Shenker-Stanford bound, both features shared by various black holes. This makes the SYK m
Externí odkaz:
http://arxiv.org/abs/2312.14644
Autor:
Jha, Rishabh, Louw, Jan C.
Publikováno v:
Phys. Rev. B 107, 235114 (2023)
It is known that the large-$q$ complex Sachdev-Ye-Kitaev (SYK) dot thermalizes instantaneously under rather general dynamical protocols. We consider a lattice of such dots coupled together, allowing for $r/2$ body hopping of particles between nearest
Externí odkaz:
http://arxiv.org/abs/2303.11432
Autor:
Jha, Rishabh
Publikováno v:
SciPost Phys. Lect. Notes 73 (2023)
We give a pedagogical introduction to the Hamiltonian formalism of general relativity at an advanced undergraduate and graduate levels. After covering the mathematical pre-requisites as well as the $3+1$-decomposition of spacetime, we proceed to disc
Externí odkaz:
http://arxiv.org/abs/2204.03537
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We show that a natural spinor-helicity formalism that can describe massive scattering amplitudes exists in $D=6$ dimensions. This is arranged by having helicity spinors carry an index in the Dirac spinor {\bf 4} of the massive little group, $SO(5) \s
Externí odkaz:
http://arxiv.org/abs/1810.11803
Autor:
Sahay, Anurag, Jha, Rishabh
Publikováno v:
Phys. Rev. D 96, 126017 (2017)
We obtain the Ruppeiner geometry associated with the non-extended state space ($\Lambda$ constant) of the charged Gauss-Bonnet AdS (GB-AdS) black holes and confirm that the state space Riemannian manifold becomes strongly curved in regions where the
Externí odkaz:
http://arxiv.org/abs/1707.03629
Akademický článek
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