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15 papers · 2 filters
Detection of quantum-vacuum field correlations outside the light cone
Francesca Fabiana Settembrini, Frieder Lindel, Alexa Marina Herter +2
According to quantum field theory, empty space -- the ground state of the theory with all real excitations removed -- is not empty at all, but filled with quantum-vacuum fluctuatio…
Purcell modification of Auger and interatomic Coulombic decay
Janine Franz, Stefan Yoshi Buhmann
An excited two-atom system can decay via different competing relaxation processes. If the excess energy is sufficiently high the system may not only relax via spontaneous emission…
Open-system approach to nonequilibrium quantum thermodynamics at arbitrary coupling
Alessandra Colla, Heinz-Peter Breuer
We develop a general theory describing the thermodynamical behavior of open quantum systems coupled to thermal baths beyond perturbation theory. Our approach is based on the exact…
Chaos in the Bose-Hubbard model and random two-body Hamiltonians
Lukas Pausch, Edoardo G. Carnio, Andreas Buchleitner +1
We investigate the chaotic phase of the Bose-Hubbard model [L. Pausch et al, Phys. Rev. Lett. 126, 150601 (2021)] in relation to the bosonic embedded random matrix ensemble, which…
Entropy Production and the Role of Correlations in Quantum Brownian Motion
Alessandra Colla, Heinz-Peter Breuer
We perform a study on quantum entropy production, different kinds of correlations, and their interplay in the driven Caldeira-Leggett model of quantum Brownian motion. The model, t…
Probing the Purcell effect without radiative decay: Lessons in the frequency and time domains
Frieder Lindel, Francesca Fabiana Settembrini, Robert Bennett +1
The microscopic processes underlying electro-optic sampling of quantum-vacuum fluctuations are discussed, leading to the interpretation of these experiments in terms of an exchange…