Chakradhar Rangi
Chakradhar Rangi
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Disorder Enhanced Thermalization in Interacting Many-Particle System
We introduce an extension of the non-equilibrium dynamical mean field theory to incorporate the effects of static random disorder in the dynamics of a many-particle system by integrating out different disorder configurations resulting in an effective time-dependent density-density interaction.
Chakradhar Rangi
,
Herbert F Fotso
,
Hanna Terletska
,
Juana Moreno
,
Ka-Ming Tam
PDF
arXiv:2403.03214
Out of Time Order Correlation of the Hubbard Model with Random Local Disorder
We present a method employing non-equilibrium dynamical mean-field theory and coherent potential approximation on the Schwinger-Keldysh contour to calculate the OTOC for disordered and interacting correlated fermionic systems.
Chakradhar Rangi
,
Ka-Ming Tam
,
Juana Moreno
PDF
arXiv:2403.03214
Engineering non-Hermitian Second Order Topological Insulator in Quasicrystals
We propose a non-Hermitian 2nd order topological insulator in 2D quasi-crystalline lattice with gapless corner states. We also engineer more exotic topo phases where corner states can be localized at designated corners.
Chakradhar Rangi
,
Ka-Ming Tam
,
Juana Moreno
PDF
arXiv:2307.03178
A measure for adiabatic contributions to quantum transitions
We construct a measure for the adiabatic contribution to quantum transitions in an arbitrary basis, tackling the generic complex case where dynamics is only partially adiabatic, simultaneously populates several eigenstates and transitions between non-eigenstates are of key interest.
Ritesh Pant
,
Pramod K. Verma
,
Chakradhar Rangi
,
Elious Mondal
,
Mansi Bhati
,
Varadharajan Srinivasan
,
Sebastian Wuster
PDF
arXiv:2007.10707
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