Bose polarons as relativistic Unruh-DeWitt detectors: Entanglement harvesting from Bose-Einstein condensates

• URL: http://arxiv.org/abs/2512.21381v1
• Date: Wed, 24 Dec 2025 19:00:00 GMT
• Title: Bose polarons as relativistic Unruh-DeWitt detectors: Entanglement harvesting from Bose-Einstein condensates
• Authors: T. Rick Perche, Francesco Gozzini, Markus K. Oberthaler,
• Abstract summary: We show that a bound impurity in a Bose-Einstein condensate can be directly mapped to an Unruh-DeWitt detector interacting with a relativistic quantum field.<n>We provide explicit experimental parameters for an implementation using $39textK$ impurities coupled to a $87textRb$ condensate via finite-time Feshbach tuning.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We show that a bound impurity in a Bose-Einstein condensate can be directly mapped to an Unruh-DeWitt detector interacting with a relativistic quantum field. We provide explicit experimental parameters for an implementation using ${}^{39}\text{K}$ impurities coupled to a ${}^{87}\text{Rb}$ condensate via finite-time Feshbach tuning. As an application, we study the extraction of vacuum entanglement from distant regions of the condensate and find viable parameters for the implementation of entanglement harvesting.

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