Zobrazeno 1 - 10
of 499
pro vyhledávání: '"Giacomelli,Luca"'
Autor:
Paris, Nicolas, Giacomelli, Luca, Daviet, Romain, Ciuti, Cristiano, Dupuis, Nicolas, Mora, Christophe
Schmid predicted that a single Josephson junction coupled to a resistive environment undergoes a quantum phase transition to an insulating phase when the shunt resistance $R$ exceeds the resistance quantum $h/(4 e^ 2)$. Recent measurements and theore
Externí odkaz:
http://arxiv.org/abs/2407.01699
We investigate the occurrence of direct and dual Shapiro steps for a Josephson junction coupled to a finite-size transmission line resonator. We treat both problems through a circuit QED approach with a large, but finite number of photon modes. For t
Externí odkaz:
http://arxiv.org/abs/2405.12935
Autor:
Giacomelli, Luca, Ciuti, Cristiano
The physics of a single Josephson junction coupled to a resistive environment is a long-standing fundamental problem at the center of an intense debate, strongly revived by the advent of superconducting platforms with high-impedance multimode resonat
Externí odkaz:
http://arxiv.org/abs/2307.06383
We make use of an analog gravity perspective to obtain a physical understanding of hydrodynamic instabilities stemming from the presence of quantized vortices in two-component atomic condensates and of their relation to ergoregion instabilities of ro
Externí odkaz:
http://arxiv.org/abs/2212.07337
Autor:
Jacquet, Maxime J., Joly, Malo, Giacomelli, Luca, Claude, Ferdinand, Glorieux, Quentin, Bramati, Alberto, Carusotto, Iacopo, Giacobino, Elisabeth
Quantum effects of fields on curved spacetimes may be studied in the laboratory thanks to quantum fluids. Here we use a polariton fluid to study the Hawking effect, the correlated emission from the quantum vacuum at the acoustic horizon. We show how
Externí odkaz:
http://arxiv.org/abs/2201.02038
Autor:
Jacquet, Maxime J, Giacomelli, Luca, Valnais, Quentin, Joly, Malo, Claude, Ferdinand, Giacobino, Elisabeth, Glorieux, Quentin, Carusotto, Iacopo, Bramati, Alberto
Vacuum quantum fluctuations near horizons are known to yield correlated emission by the Hawking effect. We use a driven-dissipative quantum fluid of microcavity polaritons as an analog model of a quantum field theory on a black-hole spacetime and num
Externí odkaz:
http://arxiv.org/abs/2110.14452
Autor:
Giacomelli, Luca, Carusotto, Iacopo
Publikováno v:
SciPost Phys. 14, 025 (2023)
We investigate the various physical mechanisms that underlie the dynamical instability of a quantized vortex array at the interface between two counter-propagating superflows in a two-dimensional Bose--Einstein condensate. Instabilities of markedly d
Externí odkaz:
http://arxiv.org/abs/2110.10588
Autor:
Giacomelli, Luca, Carusotto, Iacopo
Publikováno v:
Phys. Rev. A 104, 013313 (2021)
We theoretically investigate the spontaneous quantum emission of phonon pairs by superradiant processes in an atomic Bose-Einstein condensate subject to a synthetic vector potential. Within the analog gravity perspective, this effect corresponds to t
Externí odkaz:
http://arxiv.org/abs/2105.03964
Autor:
Giacomelli, Luca, Carusotto, Iacopo
Publikováno v:
Phys. Rev. A 103, 043309 (2021)
We theoretically investigate superradiance effects in quantum field theories in curved space-times by proposing an analogue model based on Bose--Einstein condensates subject to a synthetic vector potential. The breaking of the irrotationality constra
Externí odkaz:
http://arxiv.org/abs/2011.01736
Publikováno v:
Comptes Rendus. Physique, Vol , Iss , Pp 1-20 (2023)
We make use of an analog gravity perspective to obtain a physical understanding of hydrodynamic instabilities stemming from the presence of quantized vortices in two-component atomic condensates and of their relation to ergoregion instabilities of ro
Externí odkaz:
https://doaj.org/article/735e74a22d9a4bd3a88c879ac83bbaf4