28 citations · 201 across the 19 of their papers we have counts for
19 papers
Analytical solutions for optimal photon absorption into inhomogeneous spin memories
József Zsolt Bernád, Michael Schilling, Yutian Wen +4
We investigate for optimal photon absorption a quantum electrodynamical model of an inhomogeneously-broadened spin ensemble coupled to a single-mode cavity. Solutions to this probl…
Newton's identities and positivity of trace class integral operators
G. Homa, R. Balka, J. Z. Bernád +2
We provide a countable set of conditions based on elementary symmetric polynomials that are necessary and sufficient for a trace class integral operator to be positive semidefinite…
Entanglement in bipartite quantum systems: Euclidean volume ratios and detectability by Bell inequalities
A. Sauer, J. Z. Bernád, H. J. Moreno +1
Euclidean volume ratios between quantum states with positive partial transpose and all quantum states in bipartite systems are investigated. These ratios allow a quantitative explo…
Positivity violations of the density operator in the Caldeira-Leggett master equation
G. Homa, J. Z. Bernád, L. Lisztes
The Caldeira-Leggett master equation as an example of Markovian master equation without Lindblad form is investigated for mathematical consistency. We explore situations both analy…
An entropy production based method for determining the position diffusion's coefficient of a quantum Brownian motion
J. Z. Bernád, G. Homa, M. A. Csirik
Quantum Brownian motion of a harmonic oscillator in the Markovian approximation is described by the respective Caldeira-Leggett master equation. This master equation can be brought…
Hybrid quantum repeater based on resonant qubit-field interactions
J. Z. Bernád
We propose a hybrid quantum repeater based on ancillary coherent field states and material qubits coupled to optical cavities. For this purpose, resonant qubit-field interactions a…