5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Birla Institute of Technology and Science, PilaniIN126 papers
- Homi Bhabha National InstituteIN13 papers
- Saha Institute of Nuclear PhysicsIN11 papers
- GLA UniversityIN10 papers
- Centre National de la Recherche ScientifiqueFR8 papers
- University of CoimbraPT8 papers
- Charotar University of Science and TechnologyIN7 papers
- Indian Institute of Science BangaloreIN7 papers
- Indian Institute of Science Education and Research KolkataIN7 papers
- Indian Institute of AstrophysicsIN5 papers
- Massachusetts Institute of TechnologyUS5 papers
- Microsoft Research (India)IN5 papers
22 papers · 1 filter
Quantum-classical diagnostics and Bohmian inequivalence for higher time-derivative Hamiltonians
Sanjib Dey, Andreas Fring
We develop a Bohmian analysis of a two-dimensional ghost Hamiltonian and its mapping to the degenerate Pais-Uhlenbeck model. Using Gaussian wavepackets, we derive the corresponding…
Enhanced quantum phase estimation with -deformed nonideal nonclassical light
Duttatreya, Sanjib Dey
We investigate quantum phase estimation in a Mach-Zehnder interferometer using q-deformed photon states, including q-coherent and q-cat states, which model realistic deviations fro…
Quantum-enhanced quickest change detection of transmission loss
Saikat Guha, Tiju Cherian John, Zihao Gong +1
Augmenting a train of bright phase-modulated laser-light pulses of a coherent communications system with infinitesimally small quantum photons per pulse -- entangled across several…
Entanglement dynamics via Geometric phases in Trapped-ions
Dharmaraj Ramachandran, Ganesh Hanchanahal, Radhika Vathsan
Trapped-ion systems are a leading platform for quantum computing. The Mølmer-Sørensen (MS) gate is a widely used method for implementing controlled interactions in multipartite sys…
A Sharp Geometric Measure of Entanglement
Dharmaraj Ramachandran, Radhika Vathsan
Despite their elegance and widespread use, the current Geometric Measures (GMs) of entanglement exhibit a significant limitation: they fail to effectively distinguish Local Unitary…
Robust entanglement measure for mixed quantum states
Dharmaraj Ramachandran, Aditya Dubey, Subrahmanyam S. G. Mantha +1
We introduce an entanglement measure, the Modified Bloch Norm (MBN), for finite-dimensional bipartite mixed states, based on the improved Bloch matrix criteria. MBN is demonstrated…
Probing quantum anomalous heat flow using mid-circuit measurements
Aabhaas Vineet Mallik, Loris Maria Cangemi, Amikam Levy +1
Gate-based quantum computers are an innovative tool for experimentally studying the core principles of quantum mechanics. This work presents the first observation of quantum anomal…
Analysis of Boolean Functions Related to Binary Input Binary Output Two-party Nonlocal Games
Jyotirmoy Basak, Subhamoy Maitra, Prabal Paul +1
The famous CHSH game can be interpreted with Boolean functions while understanding the success probability in the classical scenario. In this paper, we have exhaustively studied al…
Emergence of Classicality in Stern-Gerlach Experiment via Self-Gravity
Sourav Kesharee Sahoo, Radhika Vathsan, Tabish Qureshi
Emergence of classicality from quantum mechanics, a hotly debated topic, has had no satisfactory resolution so far. Various approaches including decoherence and gravitational inter…
Testing Gravitational Self-interaction via Matter-Wave Interferometry
Sourav Kesharee Sahoo, Ashutosh Dash, Radhika Vathsan +1
The Schrodinger-Newton equation has frequently been studied as a nonlinear modification of the Schrodinger equation incorporating gravitational self-interaction. However, there is…
Entanglement Breaking Channels, Stochastic Matrices, and Primitivity
Jennifer Ahiable, David W. Kribs, Jeremy Levick +2
We consider the important class of quantum operations (completely positive trace-preserving maps) called entanglement breaking channels. We show how every such channel induces stoc…
An extension of Bravyi-Smolin's construction for UMEBs
Jeremy Levick, Mizanur Rahaman
We extend Bravyi and Smolin's construction for obtaining unextendible maximally entangled bases (UMEBs) from equiangular lines. We show that equiangular real projections of rank mo…
Compressed Sensing Tomography for qudits in Hilbert spaces of non-power-of-two dimensions
Revanth Badveli, Vinayak Jagadish, R. Srikanth +1
The techniques of low-rank matrix recovery were adapted for Quantum State Tomography (QST) previously by D. Gross et al. [Phys. Rev. Lett. 105, 150401 (2010)], where they consider…
Multi-qubit quantum computing using discrete-time quantum walks on closed graphs
Prateek Chawla, Shivani Singh, Aman Agarwal +2
Universal quantum computation can be realised using both continuous-time and discrete-time quantum walks. We present a version based on single particle discrete-time quantum walk t…
Dynamics of quantum correlations in a Qubit-Oscillator system interacting via a dissipative bath
Revanth Badveli, Vinayak Jagadish, S. Akshaya +2
The entanglement dynamics in a bipartite system consisting of a qubit and a harmonic oscillator interacting only through their coupling with the same bath is studied. The considere…
Open quantum systems with local and collective incoherent processes: Efficient numerical simulation using permutational invariance
Nathan Shammah, Shahnawaz Ahmed, Neill Lambert +2
The permutational invariance of identical two-level systems allows for an exponential reduction in the computational resources required to study the Lindblad dynamics of coupled sp…
Entanglement Breaking Rank and the existence of SIC POVMs
Satish K. Pandey, Vern I. Paulsen, Jitendra Prakash +1
We introduce and study the entanglement breaking rank of an entanglement breaking channel. We show that the entanglement breaking rank of the channel def…
Aspects of Complementarity and Uncertainty
Radhika Vathsan, Tabish Qureshi
The two-slit experiment with quantum particles provides many insights into the behaviour of quantum mechanics, including Bohr's complementarity principle. Here we analyze Einstein'…
Special rectangular (double-well and hole) potentials
Zafar Ahmed, Tanayveer Bhatia, Shashin Pavaskar +1
We revisit a rectangular barrier as well as a rectangular well (pit) between two rigid walls. The former is the well known double-well potential and the latter is a hole potential.…
Einstein's Recoiling Slit Experiment, Complementarity and Uncertainty
Tabish Qureshi, Radhika Vathsan
We analyze Einstein's recoiling slit experiment and point out that the inevitable entanglement between the particle and the recoiling-slit was not part of Bohr's reply. We show tha…
Tipping time of a quantum rod
Onkar Parrikar
The behaviour of a quantum rod, pivoted at its lower end on an impenetrable floor and restricted to moving in the vertical plane under the gravitational potential is studied analyt…
Svetlichny's inequality and genuine tripartite nonlocality in three-qubit pure states
Ashok Ajoy, Pranaw Rungta
The violation of the Svetlichny's inequality (SI) [Phys. Rev. D, 35, 3066 (1987)] is sufficient but not necessary for genuine tripartite nonlocal correlations. Here we quantify the…