63 citations · 110 across the 15 of their papers we have counts for
16 papers
Pinning of a High-Energy Wavepacket by a Single Impurity
Fartash Chalangari, Anant Vijay Varma, Joonas Keski-Rahkonen +1
We demonstrate that a single repulsive impurity enhances directional confinement of a high-energy wavepacket in a finite two-dimensional lattice of quantum wells. At energies far a…
Universality and Dynamical Inequivalence in Isospectral Non-Hermitian Anderson Transitions
Aziz Hasan, Anant Vijay Varma, Namit Anand +1
The Hatano Nelson paradigm establishes that extensive bulk nonreciprocity can destabilize Anderson localization via an imaginary gauge flux. Here, we demonstrate that extensive non…
Coexistence of Anderson Localization and Quantum Scarring in Two Dimensions
Fartash Chalangari, Anant Vijay Varma, Joonas Keski-Rahkonen +1
We investigate finite two-dimensional disordered systems with periodic confinement. At low energies, eigenstates exhibit strong Anderson localization, while at higher energies a su…
Quantum measurement of work in mesoscopic systems
Anant Vijay Varma, Doron Cohen
Heat and work in thermodynamics refer to the measurement of changes in energy content of external bodies (baths and agents). We discuss the implications of quantum mechanics on the…
Chaos-Mediated Quantum State Discrimination Near Unit Fidelity
Sourav Paul, Anant Vijay Varma, Yogesh N. Joglekar +1
We investigate a ''quantum microscope'' for qubits based on nonlinear discrete-time chaotic dynamics, which exponentially amplifies the initially small fidelity of a pair of states…
Many-body adiabatic passage: Instability, chaos, and quantum classical correspondence
Anant Vijay Varma, Amichay Vardi, Doron Cohen
Adiabatic passage in systems of interacting bosons is substantially affected by interactions and inter-particle entanglement. We consider STIRAP-like schemes in Bose-Hubbard chains…
Characterization of hybrid quantum eigenstates in systems with mixed classical phasespace
Anant Vijay Varma, Amichay Vardi, Doron Cohen
Generic low-dimensional Hamiltonian systems feature a structured, mixed classical phase-space. The traditional Percival classification of quantum spectra into regular states suppor…
Fractional Conformal Map, Qubit Dynamics and the Leggett-Garg Inequality
Sourav Paul, Anant Vijay Varma, Sourin Das
Any pure state of a qubit can be geometrically represented as a point on the extended complex plane through stereographic projection. By employing successive conformal maps on the…
Non-local spin entanglement in a fermionic chain
Sayan Jana, Anant V. Varma, Arijit Saha +1
An effective two-spin density matrix (TSDM) for a pair of spin- degree of freedom, residing at a distance of in a spinful Fermi sea, can be obtained from the two-electron…
Essential role of quantum speed limit in violation of Leggett-Garg inequality across a PT-transition
Anant V. Varma, Jacob E. Muldoon, Sourav Paul +2
We study Leggett-Garg inequality (LGI) of a two level system (TLS) undergoing non-Hermitian dynamics governed by a non-linear Bloch equation (derived in J. Phys. A: Math. Theor. 54…
Leggett-Garg inequality in Markovian quantum dynamics: role of temporal sequencing of coupling to bath
Sayan Ghosh, Anant V. Varma, Sourin Das
We study Leggett-Garg inequalities (LGIs) for a two level system (TLS) undergoing Markovian dynamics described by unital maps. We find analytic expression of LG parameter (…
Simulating non-Hermitian dynamics of a multi-spin quantum system and an emergent central spin model
Anant V. Varma, Sourin Das
It is possible to simulate the dynamics of a single spin- ( symmetric) system by conveniently embedding it into a subspace of a larger Hilbert space with unitary…
Temporal correlation beyond quantum bounds in non-hermitian dynamics
Anant V. Varma, Ipsika Mohanty, Sourin Das
We study the dynamics of two level systems described by non-hermitian Hamiltonians with real eigenvalues. Within the framework of hermitian quantum mechanics, it is known that maxi…
LHC Constraints on a Gauge Model using Contur
S. Amrith, J. M. Butterworth, F. F. Deppisch +3
The large and growing library of measurements from the Large Hadron Collider has significant power to constrain extensions of the Standard Model. We consider such constraints on a…
Majorana zero energy modes in silicene
Anant Vijay Varma, Prasanta K. Panigrahi
Zero energy modes are shown to exist in silicene under suitably chosen magnetic as well as electric fields. Two Majorana modes are found on the application of opposite local magnet…
Entanglement and Quantum phase transition in topological insulators
Anvesh Raja Kovela, Anant Vijay Verma, Prasanta K. Panigrahi +1
Presence of entangled states is explicitly shown in Topological insulator (TI) . The surface and bulk state are found to have the different structures of entanglement. Th…