Measurement of the total energy of an isolated system by an internal observer

S Massar, S Popescu

Research output: Contribution to journalArticle (Academic Journal)peer-review

2 Citations (Scopus)

Abstract

We consider the situation in which an observer internal to an isolated system wants to measure the total energy of the isolated system (this includes his own energy, that of the measuring device and clocks used, etc.). We show that he can do this in an arbitrarily short time, as measured by his own clock. This measurement is not subjected to a time-energy uncertainty relation. The properties of such measurements are discussed in detail with particular emphasis on the relation between the duration of the measurement as measured by internal clocks versus external clocks.

Translated title of the contributionMeasurement of the total energy of an isolated system by an internal observer
Original languageEnglish
Article number042106
Pages (from-to)042106
Number of pages6
JournalPhysical Review A: Atomic, Molecular and Optical Physics
Volume71
Issue number4
DOIs
Publication statusPublished - Apr 2005

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