Phys. Rev. A 71, 042106 (2005) [6 pages]Measurement of the total energy of an isolated system by an internal observerReceived 10 December 2004; published 20 April 2005 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.71.042106
DOI:
10.1103/PhysRevA.71.042106
PACS:
03.65.Ta
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.