Proposal of quantum arrival-time measurement with a Bose-Einstein condensate

• URL: http://arxiv.org/abs/2606.20278v1
• Date: Thu, 18 Jun 2026 14:21:12 GMT
• Title: Proposal of quantum arrival-time measurement with a Bose-Einstein condensate
• Abstract summary: We show how a Bose-Einstein condensate of ultracold atoms could be used to address a long-standing question in quantum theory.<n>How much time does it take for a particle to reach a detector?<n>We propose a realistic experimental setup, whose key idea is not to measure arrival times directly, but the arrival flux on the detector as a function of its position.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This work shows how a Bose-Einstein condensate of ultracold atoms could be used to address a long-standing question in quantum theory: how much time does it take for a particle to reach a detector? To this end, we propose a realistic experimental setup, whose key idea is not to measure arrival times directly, but the arrival flux on the detector as a function of its position. This novel approach not only solves practical issues with having a detector close to the system, but also results in signals that allow to unambiguously distinguish different theoretical predictions. This proposal raises prospects for resolving the decades-old debate on this fundamental issue.

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