U
Uma Divakaran
Researcher at Indian Institutes of Technology
Publications - 58
Citations - 1096
Uma Divakaran is an academic researcher from Indian Institutes of Technology. The author has contributed to research in topics: Quantum phase transition & Quantum critical point. The author has an hindex of 15, co-authored 54 publications receiving 883 citations. Previous affiliations of Uma Divakaran include Saarland University & Indian Institute of Technology Kanpur.
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Defect production due to quenching through a multicritical point
TL;DR: In this article, the authors studied the defect generation when a quantum spin system is quenched through a multicritical point by changing a parameter of the Hamiltonian as t/tau, where tau is the characteristic timescale of quenching.
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Nonequilibrium quantum relaxation across a localization-delocalization transition
TL;DR: In this article, the authors considered the one-dimensional $XX$ model in a quasiperiodic transverse field described by the Harper potential and studied the nonequilibrium relaxation of the system by applying two protocols: a sudden change of quench dynamics and a slow change of adiabatic dynamics.
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Non-equilibrium quantum dynamics after local quenches
TL;DR: In this paper, the authors studied the quantum dynamics resulting from preparing a one-dimensional quantum system in the ground state of initially two decoupled parts which are then joined together (local quench).
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Tuning the presence of dynamical phase transitions in a generalized X Y spin chain
TL;DR: It is shown that DPTs can completely disappear for some values of the anisotropy term (γ) and τ, thereby establishing the existence of boundaries in the (γ-τ) plane between the DPT and no-DPT regions in both isotropic and anisotropic cases.
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Scaling of the decoherence factor of a qubit coupled to a spin chain driven across quantum critical points
TL;DR: In this article, the scaling of the decoherence factor of a qubit (spin-$1/2$) using the central spin model in which the central qubit is globally coupled to a transverse XY spin chain was studied.