Antidynamical Casimir effect as a resource for work extraction

Додонов, А. В.; Valente, Daniel; Werlang, T.

doi:10.1103/physreva.96.012501

Cited by 11 publications

(29 citation statements)

References 97 publications

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“…Therefore, based on Ref. [89], one can conclude that the positive quantum work in our system can be extracted and externally controlled by the modulation parameters of the atomic collisions frequency and the mechanical spring coefficient which open a new way to the quantum thermodynamics of the DCE physics.…”

Section: B Modulating Atomic Collisions Without Mo Modulationmentioning

confidence: 75%

Controllable generation of photons and phonons in a coupled Bose–Einstein condensate-optomechanical cavity via the parametric dynamical Casimir effect

Motazedifard¹,

Dalafi²,

Naderi³

et al. 2018

Annals of Physics

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We theoretically propose and investigate a feasible experimental scheme for the realization of the dynamical Casimir effect (DCE) in a hybrid optomechanical cavity with a moving end mirror containing an interacting cigar-shaped Bose-Einstein condensate (BEC). We show that in the red-detuned regime of cavity optomechanics together with the weak optomechanical coupling limit by coherent modulation of the s-wave scattering frequency of the BEC and the mechanical spring coefficient of the mechanical oscillator (MO), the mechanical and atomic quantum vacuum fluctuations are parametrically amplified, which consequently lead to the generation of the mechanical/Bogoliubov-type Casimir phonons. Interestingly, in the coherent regime corresponding to the case of largely different optomechanical coupling strengths of the cavity field to the BEC and the MO, or equivalently largely different cooperativities, one can generate a large number of Casimir photons due to the amplification of the intracavity vacuum fluctuations induced by the time modulations of the BEC and the MO. The number of generated Casimir particles are externally controllable by the cooperativities, and the modulation amplitudes of the atomic collisions rate and the mechanical spring coefficient.

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Section: B Modulating Atomic Collisions Without Mo Modulationmentioning

confidence: 75%

Controllable generation of photons and phonons in a coupled Bose–Einstein condensate-optomechanical cavity via the parametric dynamical Casimir effect

Motazedifard¹,

Dalafi²,

Naderi³

et al. 2018

Annals of Physics

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“…where L[Ô] ≡ÔρÔ † −Ô †Ôρ /2 −ρÔ †Ô /2 is the Lindblad superoperator, κ is the cavity relaxation rate and γ k,l (γ (φ) k ) are the atomic relaxation (pure dephasing) rates. Notice that related works demonstrated that for g k,l /ω < 10 −1 and initial times this approach is a good approximation to a more rigorous microscopic model of dissipation [39,45,57]. Typical behavior of 3-photon DCE under unitary and dissipative evolutions is illustrated in Fig.…”

Section: Discussionmentioning

confidence: 82%

One- and three-photon dynamical Casimir effects using a nonstationary cyclic qutrit

Dessano

Додонов

2018

Phys. Rev. A

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We consider the nonstationary circuit QED setup in which a 3-level artificial atom in the ∆configuration interacts with a single-mode cavity field of natural frequency ω. It is demonstrated that when some atomic energy level(s) undergoes a weak harmonic modulation, photons can be generated from vacuum via effective 1-and 3-photon transitions, while the atom remains approximately in the ground state. These phenomena occur in the dispersive regime when the modulation frequency is accurately tuned near ω and 3ω, respectively, and the generated field states exhibit strikingly different statistics from the squeezed vacuum state attained in standard cavity dynamical Casimir effect.arXiv:1805.04887v2 [quant-ph]

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“…The dynamical Casimir effect, consisting in the deterministic generation of quanta from the initial vacuum field state, is an emblematic example of the quantum dynamics that can be achieved in a nonstationary cavity QED regime [18,[32][33][34][35]. Conversely, in the antidynamical Casimir effect (ADCE), photons can be coherently annihilated from a large class of nonvacuum initial states [36][37][38][39]. Besides, excitations can be deterministically transferred between the field and a far-detuned atom using the sideband transitions, as demonstrated in [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [40], for instance, we have recently demonstrated that the ADCE can be used as a resource for work extraction.…”

Section: Introductionmentioning

confidence: 99%

Quantum power boost in a nonstationary cavity-QED quantum heat engine

Додонов¹,

Valente²,

Werlang³

2018

J. Phys. A: Math. Theor.

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We show a quantum boost in the output power of a heat engine formed by a two-level system coupled to a single-mode cavity. The key ingredient here is the nonstationary regime achieved when some system parameter (atomic transition frequency, in our case) is subjected to a time-dependent perturbative modulation that is precisely tuned at certain frequencies. We discuss how the extracted power can lead to amplification of the external driving field. Quantum power boost is found both in the nonstationary Jaynes-Cummings and Rabi models, indicating that our predictions can be experimentally tested in circuit quantum electrodynamics setups.

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Antidynamical Casimir effect as a resource for work extraction

Cited by 11 publications

References 97 publications

Controllable generation of photons and phonons in a coupled Bose–Einstein condensate-optomechanical cavity via the parametric dynamical Casimir effect

Controllable generation of photons and phonons in a coupled Bose–Einstein condensate-optomechanical cavity via the parametric dynamical Casimir effect

One- and three-photon dynamical Casimir effects using a nonstationary cyclic qutrit

Quantum power boost in a nonstationary cavity-QED quantum heat engine

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