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• W4280607575 abstract "The Unruh effect states an accelerated particle detector registers a thermal response when moving through the Minkowski vacuum, and its thermal feature is believed to be inseparable from Lorentz symmetry: Without the latter, the former disappears. Here we propose to observe analogue circular Unruh effect using an impurity atom in a quasi-two-dimensional Bose-Einstein condensate (BEC) with dominant dipole-dipole interactions between atoms or molecules in the ultracold gas. Quantum fluctuations in the condensate possess a Bogoliubov spectrum $omega_{mathbf k}=c_0|{mathbf k}|f(hbar,c_0|{mathbf k}|/M_ast)$, working as an analogue Lorentz-violating quantum field with the Lorentz-breaking scale $M_ast$, and the impurity acts as an effective Unruh-DeWitt detector thereof. When the detector travels close to the sound speed, observation of the Unruh effect in our quantum fluid platform becomes experimentally feasible. In particular, the deviation of the Bogoliubov spectrum from the Lorentz-invariant case is highly engineerable through the relative strength of the dipolar and contact interactions, and thus a viable laboratory tool is furnished to experimentally investigate whether the thermal characteristic of Unruh effect is robust to the breaking of Lorentz symmetry." @default.
• W4280607575 created "2022-05-22" @default.
• W4280607575 creator A5019682233 @default.
• W4280607575 creator A5045593245 @default.
• W4280607575 creator A5058364593 @default.
• W4280607575 creator A5066599847 @default.
• W4280607575 creator A5076327860 @default.
• W4280607575 date "2022-09-15" @default.
• W4280607575 modified "2023-10-15" @default.
• W4280607575 title "Probing Lorentz-invariance-violation-induced nonthermal Unruh effect in quasi-two-dimensional dipolar condensates" @default.
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