Acoustic Analog to the Dynamical Casimir Effect in a Bose-Einstein Condensate

Jaskula, Jean-Christophe; Partridge, Guthrie B.; Bonneau, Marie; Lopes, Raphaël; Ruaudel, Josselin; Boiron, Denis; Westbrook, Christoph I

doi:10.1103/physrevlett.109.220401

Cited by 185 publications

(288 citation statements)

References 32 publications

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“…Such quantum vacuum amplification effect, known as the Dynamical Casimir Effect (DCE) [14][15][16], has been observed in recent experiments with superconducting circuits [17,18], and also investigated in the context of Bose-Einstein condensates [19], in excition-polariton condensates [20], for multipartite entanglement generation in cavity networks [21] and for quantum communication protocols [22]. Here, we show that the DCE is a fundamental, purely quantum, limitation to cooling.…”

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confidence: 56%

Dynamical Casimir effect and minimal temperature in quantum thermodynamics

Benenti

Strini

2015

Phys. Rev. A

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We study the fundamental limitations of cooling to absolute zero for a qubit, interacting with a single mode of the electromagnetic field. Our results show that the dynamical Casimir effect, which is unavoidable in any finite-time thermodynamic cycle, forbids the attainability of the absolute zero of temperature, even in the limit of an infinite number of cycles.PACS numbers: 05.70. Ln, 07.20.Pe, Introduction. Due to recent progress of nanofabrication technology, quantum effects in small heat engines have become an increasingly important subject. Concepts from quantum thermodynamics [1] have been applied to investigate questions such as the optimization of quantum thermal machines [2], the fundamental dimensional limits to thermodynamic machines [3], and the minimum temperature achievable in nanoscopic chillers [4][5][6][7][8][9][10][11]. Cooling a system to the absolute zero of temperature (T = 0) is prohibited by Nernst's unattainability principle [12], also known as the dynamical formulation of the third law of thermodynamics. Such principle states that it is impossible by any procedure to reduce any system to T = 0 in finite time. Nernst's principle has been recently challenged [8].It this Letter, we investigate the unattainability principle in a minimal model: a qubit coupled to a single mode of the electromagnetic field, i.e. a harmonic oscillator. The oscillator is the working medium, shuttling heat from the qubit to a hot reservoir by means of a (quantum) Otto cycle. Although oversimplified, our model has several relevant features:

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confidence: 56%

Dynamical Casimir effect and minimal temperature in quantum thermodynamics

Benenti

Strini

2015

Phys. Rev. A

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“…This shows that the DCE can be regarded as an effective and practical resource to generate useful correlations for entanglement-based [6] and non-entanglement-based quantum technologies in the continuous variable setting, including in particular quantum estimation and communication. An experimental verification of black-box phase estimation [14] in a superconducting architecture [2] or in a Bose-Einstein condensate [20], based exclusively on correlated probe states of the (radiation or phononic) field generated by the DCE, and exploiting thermal enhancements, would be an intriguing subject for a future work. Finally, let us highlight that these results would be valid as well to any process that generates multimode squeezed states in the presence of thermal noise.…”

Section: Discussionmentioning

confidence: 99%

Generation of quantum steering and interferometric power in the dynamical Casimir effect

Sabín

Adesso

2015

Phys. Rev. A

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We analyze the role of the dynamical Casimir effect as a resource for quantum technologies, such as quantum cryptography and quantum metrology. In particular, we consider the generation of Einstein-Podolsky-Rosen steering and Gaussian interferometric power, two useful forms of asymmetric quantum correlations, in superconducting waveguides modulated by superconducting quantum interferometric devices. We show that while a certain value of squeezing is required to overcome thermal noise and give rise to steering, any nonzero squeezing produces interferometric power which in fact increases with thermal noise.

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“…Indeed, one experiment claims to have effectively measured the DCE using a superconducting quantum interference device (SQUID) that acts as a moving mirror [17]. In another recent set of experiments [18] an analogue of the DCE has been observed in the case of a Bose-Einstein condensate.…”

Section: Introductionmentioning

confidence: 99%

Time dependence of particle creation from accelerating mirrors

2013

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Particle production due to a quantized, massless, minimally coupled scalar field in two-dimensional flat spacetime with an accelerating mirror is investigated, with a focus on the time dependence of the process. We analyze first the classes of trajectories previously investigated by Carlitz and Willey and by Walker and Davies. We then analyze four new classes of trajectories, all of which can be expressed analytically and for which several ancillary properties can be derived analytically. The time dependence is investigated through the use of wave packets for the modes of the quantized field that are in the out vacuum state. It is shown for most of the trajectories studied that good time resolution of the particle production process can be obtained.

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Acoustic Analog to the Dynamical Casimir Effect in a Bose-Einstein Condensate

Cited by 185 publications

References 32 publications

Dynamical Casimir effect and minimal temperature in quantum thermodynamics

Dynamical Casimir effect and minimal temperature in quantum thermodynamics

Generation of quantum steering and interferometric power in the dynamical Casimir effect

Time dependence of particle creation from accelerating mirrors

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