Exotic states in the dynamical Casimir effect

Benenti, Giuliano; Siccardi, Stefano; Strini, G.

doi:10.1140/epjd/e2014-50049-y

Cited by 13 publications

(15 citation statements)

References 44 publications

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“…Moreover, the parameters used in our simulations are within reach for present technology, where coupling strengths even exceeding the resonator frequency have been recently reported [12,13]. Additionally, in circuit quantum electrodynamics experiments the populations of Fock and coherent states were measured by means of the Fourier transform of the time-dependent polarization signal of a probe qubit interacting with the field [45]; extensions of this method [46] would allow not only the detection of the number of photons but also the reconstruction of the exotic field states generated by the DCE [47]. More realistic models would need a detailed treatment of decoherence sources and experimental imperfections, e.g.…”

Section: Discussionmentioning

confidence: 99%

Amplification of the parametric dynamical Casimir effect via optimal control

et al. 2017

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We introduce different strategies to enhance photon generation in a cavity within the Rabi model in the ultrastrong coupling regime. We show that a bang-bang strategy allows to enhance the effect of up to one order of magnitude with respect to simply driving the system in resonance for a fixed time. Moreover, up to about another order of magnitude can be gained exploiting quantum optimal control strategies. Finally, we show that such optimized protocols are robust with respect to systematic errors and noise, paving the way to future experimental implementations of such strategies.

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Section: Discussionmentioning

confidence: 99%

Amplification of the parametric dynamical Casimir effect via optimal control

et al. 2017

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“…Let us mention that some aspects of the temporary evolution of systems with dynamically tunable light- matter interaction were already studied in literature, see, e.g., Refs. [25][26][27][38][39][40][41]. This interaction was assumed to be either variated along or simultaneously with other parameters, such as a cavity frequency.…”

Section: Effect Of Cavity Relaxationmentioning

confidence: 99%

Dynamical Lamb effect versus dissipation in superconducting quantum circuits

et al. 2016

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Superconducting circuits provide a new platform to study nonstationary cavity QED phenomena. An example of such a phenomenon is a dynamical Lamb effect which is a parametric excitation of an atom due to the nonadiabatic modulation of its Lamb shift. This effect has been initially introduced for a natural atom in a varying cavity, while we suggested its realization in a superconducting qubitcavity system with dynamically tunable coupling. In the present paper, we study the interplay between the dynamical Lamb effect and the energy dissipation, which is unavoidable in realistic systems. We find that despite of naive expectations this interplay can lead to unexpected dynamical regimes. One of the most striking results is that photon generation from vacuum can be strongly enhanced due to the qubit relaxation, which opens a new channel for such a process. We also show that dissipation in the cavity can increase the qubit excited state population. Our results can be used for the experimental observation and investigation of the dynamical Lamb effect and accompanying quantum effects.

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“…For initial ZES the effective Hamiltonian readsH = θ|ϕ 0,− ϕ 2,R | + θ 2 |ϕ 2,R ϕ 4,R2 | + h.c., where θ is given by (15) and…”

Section: A Enhanced Photon Generation From Vacuum In Resonant Regimementioning

confidence: 99%

Prospects for observing dynamical and anti- dynamical Casimir effects in circuit QED due to fast modulation of qubit parameters

Veloso

Додонов

2015

J. Phys. B: At. Mol. Opt. Phys.

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We consider the nonstationary circuit QED architecture, where a single artificial two-level atom interacts with a cavity field mode under external modulation of one or more system parameters. Two different approaches are employed to study the effects of Markovian dissipation on modulationinduced transitions between the atom-field dressed states: the standard master equation of Quantum Optics and the recently formulated dressed-picture master equation. We estimate the associated transition rates and show that photon generation from vacuum ("dynamical Casimir effect", DCE) and coherent photon annihilation from nonvacuum states ("Anti-DCE") are possible with the current state-of-the-art parameters.

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Exotic states in the dynamical Casimir effect

Cited by 13 publications

References 44 publications

Amplification of the parametric dynamical Casimir effect via optimal control

Amplification of the parametric dynamical Casimir effect via optimal control

Dynamical Lamb effect versus dissipation in superconducting quantum circuits

Prospects for observing dynamical and anti- dynamical Casimir effects in circuit QED due to fast modulation of qubit parameters

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