26 citations · 43 across the 9 of their papers we have counts for
9 papers
Practical Tomography of Multi-Time Processes
Abhinash Kumar Roy, Varun Srivastava, Christina Giarmatzi +1
Characterising multi-time quantum processes is essential for analysing temporally correlated noise and for designing effective control and mitigation strategies. A complete operati…
Blind-spots of Randomized Benchmarking Under Temporal Correlations
Varun Srivastava, Abhinash Kumar Roy, Soumik Mahanti +3
Randomized benchmarking (RB) is a widely adopted protocol for estimating the average gate fidelity in quantum hardware. However, its standard formulation relies on the assumption o…
Hamiltonian characterisation of multi-time processes with classical memory
Kaumudibikash Goswami, Abhinash Kumar Roy, Varun Srivastava +4
A central problem in open quantum systems is the characterization of non-Markovian processes, where an environment retains the memory of its interaction with the system. A key dist…
Semi-device-independent certification of quantum non-Markovianity using sequential Random Access Codes
Abhinash Kumar Roy, Varun Srivastava, Soumik Mahanti +2
The characterization of multi-time correlations in open quantum systems is of fundamental importance. In this work, we investigate multi-time processes using the process matrix for…
Coherence, Path-Predictability and I-Concurrence: A Triality
Abhinash Kumar Roy, Neha Pathania, Nitish Kumar Chandra +2
It is well known that fringe contrast is not a good quantifier of the wave nature of a quanton in multipath interference. A new interference visibility, based on the Hilbert-Schmid…
Dynamics of tripartite correlations for three qubits in independent thermal reservoirs
Sourabh Magare, Abhinash Kumar Roy, Prasanta K. Panigrahi
We investigate the dynamical evolution of multipartite entanglement in tripartite systems with three qubits present in independent thermal reservoirs, modelled as infinite set of q…
Trace dynamics, and a ground state in spontaneous quantum gravity
Abhinash Kumar Roy, Anmol Sahu, Tejinder P. Singh
We have recently proposed a Lagrangian in trace dynamics, to describe a possible unification of gravity, Yang-Mills fields, and fermions, at the Planck scale. This Lagrangian for t…
'Complementarity' in paraxial and non-paraxial optical beams
Abhinash Kumar Roy, Nitish Kumar Chandra, Soumik Mahanti +1
Establishing the correspondence of two dimensional paraxial and three dimensional non-paraxial optical beams with the qubit and qutrit systems respectively, we derive a complementa…
1-d Ising model using Kronecker sum and Kronecker product
Sourabh Magare, Abhinash Kumar Roy, Varun Srivastava
Calculations in Ising model can be cumbersome and non-intuitive. Here we provide a formulation that addresses these issues for 1-D scenario. We represent the microstates of spin in…