Particle creation in the spin modes of a dynamically oscillating two-component Bose-Einstein condensate

Butera, Salvatore; Carusotto, Iacopo

doi:10.1103/physrevd.104.083503

Cited by 9 publications

(6 citation statements)

References 59 publications

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“…These far-from-equilibrium and non-perturbative processes could leave imprints on the sky today [43][44][45]. Though in the long term, large-scale quantum simulations of quantum inflationary fields are desired [46][47][48][49], near-term studies can be useful as well [50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65]. Non-equilibrium dynamics are also required for generating the observed baryon asymmetry [66].…”

Section: Physics Drivesmentioning

confidence: 99%

“…These far-from-equilibrium and non-perturbative processes could leave imprints on the sky today [43][44][45]. While in the long term, large-scale quantum simulations of quantum inflationary fields are desired [46][47][48][49], near-term studies could improve calculations of the quantum back-reactions [50] onto classical inflation fields and scalar/tensor perturbations directly from non-perturbative quantum effects. Further near-term opportunities exist in using analog quantum devices to simulate the dynamics of reheating with ultracold Bose gases [51].…”

Section: Physics Drive: Cosmology and Early Universementioning

confidence: 99%

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Quantum Simulation for High Energy Physics

Bauer¹,

Davoudi²,

Balantekin³

et al. 2022

Preprint

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It is for the first time that quantum simulation for High Energy Physics (HEP) is studied in the U.S. decadal particle-physics community planning, and in fact until recently, this was not considered a mainstream topic in the community. This fact speaks of a remarkable rate of growth of this subfield over the past few years, stimulated by the impressive advancements in Quantum Information Sciences (QIS) and associated technologies over the past decade, and the significant investment in this area by the government and private sectors in the U.S. and other countries. High-energy physicists have quickly identified problems of importance to our understanding of nature at the most fundamental level, from tiniest distances to cosmological extents, that are intractable with classical computers but may benefit from quantum advantage. They have initiated, and continue to carry out, a vigorous program in theory, algorithm, and hardware co-design for simulations of relevance to the HEP mission. This community whitepaper is an attempt to bring this exciting and yet challenging area of research to the spotlight, and to elaborate on what the promises, requirements, challenges, and potential solutions are over the next decade and beyond.

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Section: Physics Drivesmentioning

confidence: 99%

Section: Physics Drive: Cosmology and Early Universementioning

confidence: 99%

Quantum Simulation for High Energy Physics

Bauer¹,

Davoudi²,

Balantekin³

et al. 2022

Preprint

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“…The latter can give rise to the sonic analogue of a black hole event horizon, which has been realised and extensively studied in BEC . Similarly, rotating BEC can furnish analogues of rotating Kerr black holes and the Penrose effect [51,52], while expanding BEC or those with changing interaction strengths can mimic expanding universes [53][54][55][56][57][58][59][60][61][62] for the study of quantum fields during cosmological inflation. BECs are a popular platform for the above studies, since they behave like a fluid under suitable conditions [63] and are naturally so cold that thermal fluctuations can often be neglected and thus do not mask the dynamics of quantum fluctuations one intends to study.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic inflation in dipolar Bose–Einstein condensates

Rana,

Pendse,

Wüster

et al. 2023

New J. Phys.

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Early during the era of cosmic inﬂation, rotational invariance may have been broken, only later emerging as a feature of low-energy physics. This motivates ongoing searches for residual signatures of anisotropic space-time, for example in the power spectrum of the cosmic microwave background. We propose that dipolar Bose-Einstein condensates (BECs) furnish a laboratory quantum simulation platform for the anisotropy evolution of ﬂuctuation spectra during inﬂation, exploiting the fact that the speed of dipolar condensate sound waves depends on direction. We construct the anisotropic analogue space-time metric governing sound, by linking the time-varying strength of dipolar and contact interactions in the BEC to the scale factors in diﬀerent coordinate directions. Based on these, we calculate the dynamics of phonon power spectra during an inﬂation that renders the initially anisotropic universe isotropic. We ﬁnd that the expansion speed provides an experimental handle to control and study the degree of ﬁnal residual anisotropy. Gravity analogues using dipolar condensates can thus provide tuneable experiments for a ﬁeld of cosmology that was until now conﬁned to a single experiment, our universe.

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“…A most celebrated achievement was the observation of the analog of Hawking radiation [3,4] emanating from the acoustic horizon in a trans-sonically flowing Bose-Einstein condensates (BECs) of ultra-cold atoms [5][6][7][8][9]. Analogs of cosmological particle creation effects have also been investigated on the BEC platform both theoretically [10][11][12][13][14] and experimentally [15,16].…”

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confidence: 99%

Numerical studies of back-reaction effects in an analog model of cosmological pre-heating

Butera¹,

Carusotto²

2022

Preprint

Self Cite

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We theoretically propose an atomic Bose-Einstein condensate as an analog model of back-reaction effects during the pre-heating stage of early Universe. In particular, we address the out-ofequilibrium dynamics where the initially excited inflaton field decays by parametrically exciting the matter fields. We consider a two-dimensional, ring-shaped BEC under a tight transverse confinement whose transverse breathing mode and the Goldstone and dipole excitation branches simulate the inflaton and quantum matter fields, respectively. A strong excitation of the breathing mode leads to an exponentially-growing emission of dipole and Goldstone excitations via parametric pair creation: our numerical simulations of the BEC dynamics show how the associated back-reaction effect not only results in an effective friction of the breathing mode but also in a quick loss of longitudinal spatial coherence of the initially in-phase excitations. Implications of this result on the validity of the usual semiclassical description of back-reaction are finally discussed.

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Particle creation in the spin modes of a dynamically oscillating two-component Bose-Einstein condensate

Cited by 9 publications

References 59 publications

Quantum Simulation for High Energy Physics

Quantum Simulation for High Energy Physics

Anisotropic inflation in dipolar Bose–Einstein condensates

Numerical studies of back-reaction effects in an analog model of cosmological pre-heating

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