[HTML][HTML] Precision and work fluctuations in gaussian battery charging

N Friis, M Huber - Quantum, 2018 - quantum-journal.org
One of the most fundamental tasks in quantum thermodynamics is extracting energy from
one system and subsequently storing this energy in an appropriate battery. Both of these …

Generating multimode entangled microwaves with a superconducting parametric cavity

CW Sandbo Chang, M Simoen, J Aumentado… - Physical Review …, 2018 - APS
We demonstrate the generation of multimode entangled states of propagating microwaves.
The entangled states are generated by our parametrically pum** a multimode …

Phonon pair creation by inflating quantum fluctuations in an ion trap

M Wittemer, F Hakelberg, P Kiefer, JP Schröder, C Fey… - Physical review …, 2019 - APS
Quantum theory predicts intriguing dynamics during drastic changes of external conditions.
We switch the trap** field of two ions sufficiently fast to tear apart quantum fluctuations, ie …

Quantum aspects of stimulated Hawking radiation in an optical analog white-black hole pair

I Agullo, AJ Brady, D Kranas - Physical Review Letters, 2022 - APS
This Letter introduces a synergistic combination of analytical and numerical methods to
study the Hawking effect in optical systems containing the analog of a white-black hole pair …

Impurities as a quantum thermometer for a Bose-Einstein condensate

C Sabín, A White, L Hackermuller, I Fuentes - Scientific reports, 2014 - nature.com
We introduce a primary thermometer which measures the temperature of a Bose-Einstein
Condensate in the sub-nK regime. We show, using quantum Fisher information, that the …

Passivity and practical work extraction using Gaussian operations

EG Brown, N Friis, M Huber - New Journal of Physics, 2016 - iopscience.iop.org
Quantum states that can yield work in a cyclical Hamiltonian process form one of the primary
resources in the context of quantum thermodynamics. Conversely, states whose average …

Preserving quantum information in f(Q) non-metric gravity cosmology

S Capozziello, A Lapponi, O Luongo… - The European Physical …, 2024 - Springer
The effects of cosmological expansion on quantum bosonic states are investigated, using
quantum information theory. In particular, a generic Bogoliubov transformation of bosonic …

Thermodynamics of creating correlations: Limitations and optimal protocols

DE Bruschi, M Perarnau-Llobet, N Friis… - Physical Review E, 2015 - APS
We establish a rigorous connection between fundamental resource theories at the quantum
scale. Correlations and entanglement constitute indispensable resources for numerous …

Symplectic circuits, entanglement, and stimulated Hawking radiation in analogue gravity

AJ Brady, I Agullo, D Kranas - Physical Review D, 2022 - APS
We introduce a convenient set of analytical tools (the Gaussian formalism) and diagrams
(symplectic circuits) to analyze multimode scattering events in analogue gravity, such as pair …

Quantum entanglement in analogue Hawking radiation: When is the final state nonseparable?

X Busch, R Parentani - Physical Review D, 2014 - APS
We study the quantum entanglement of the quasiparticle pairs emitted by analog black
holes. We use a phenomenological description of the spectra in dispersive media to study …