``Weighing'' a closed system and the time-energy uncertainty principle

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dc.creatorAharonov, Yakir
dc.creatorReznik, Benni
dc.date1999-06-09
dc.date.accessioned2026-07-07T12:33:29Z
dc.date.available2026-07-07T12:33:29Z
dc.descriptionA gedanken-experiment is proposed for `weighing'' the total mass of a closed system from within the system. We prove that for an internal observer the time $τ$, required to measure the total energy with accuracy $ΔE$, is bounded according to $τΔE >\hbar $. This time-energy uncertainty principle for a closed system follows from the measurement back-reaction on the system. We generally examine what other conserved observables are in principle measurable within a closed system and what are the corresponding uncertainty relations.
dc.description8 pages
dc.identifierhttps://arxiv.org/abs/quant-ph/9906030
dc.identifierhttp://arxiv.org/abs/quant-ph/9906030
dc.identifierPhys.Rev.Lett.84:1368-1370,2000
dc.identifierdoi:10.1103/PhysRevLett.84.1368
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/217141
dc.subjectQuantum Physics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.title``Weighing'' a closed system and the time-energy uncertainty principle
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