12 citations · 19 across the 8 of their papers we have counts for
9 papers
Gaussian entanglement and quantum communication: geodesic optimization and multimode bounds
Hemant K. Mishra, Mark M. Wilde
Loss and noise limit the use of light to distribute entanglement, transmit quantum information, and establish secret keys. Gaussian states have a compact description in terms of me…
Near-optimal performance of square-root measurement for general score functions and quantum ensembles
Hemant K. Mishra, Ludovico Lami, Mark M. Wilde
The Barnum-Knill theorem states that the optimal success probability in the multiple state discrimination task is not more than the square root of the success probability when the…
A Complete Characterization of Passive Unitary Normalizable (PUN) Gaussian States
Tiju Cherian John, Hemant K. Mishra, Saikat Guha
We provide a complete characterization of the class of multimode quantum Gaussian states that can be reduced to a tensor product of thermal states using only a passive unitary oper…
Converse bounds for quantum hypothesis exclusion: A divergence-radius approach
Kaiyuan Ji, Hemant K. Mishra, Milán Mosonyi +1
Hypothesis exclusion is an information-theoretic task in which an experimenter aims at ruling out a false hypothesis from a finite set of known candidates, and an error occurs if a…
Simultaneous symplectic spectral decomposition of positive semidefinite matrices
Rudra R. Kamat, Hemant K. Mishra
We establish necessary and sufficient conditions on simultaneous symplectic spectral decomposition of a family of real positive semidefinite matrices with symplectic…
Barycentric bounds on the error exponents of quantum hypothesis exclusion
Kaiyuan Ji, Hemant K. Mishra, Milán Mosonyi +1
Quantum state exclusion is an operational task with application to ontological interpretations of quantum states. In such a task, one is given a system whose state is randomly sele…
Multivariate Fidelities
Theshani Nuradha, Hemant K. Mishra, Felix Leditzky +1
The main contribution of our paper is to introduce a number of multivariate quantum fidelities and show that they satisfy several desirable properties that are natural extensions o…
Orthosymplectic diagonalization in Williamson's theorem
Hemant K. Mishra
In this paper, we provide an algebraic condition on any real symmetric positive definite matrix which is necessary and sufficient for the matrix to be diagonalized b…
On the optimal error exponents for classical and quantum antidistinguishability
Hemant K. Mishra, Michael Nussbaum, Mark M. Wilde
The concept of antidistinguishability of quantum states has been studied to investigate foundational questions in quantum mechanics. It is also called quantum state elimination, be…