Instantaneous measurements of nonlocal variables

Berry Groisman, Benni Reznik, Lev Vaidman

Research output: Contribution to journalArticlepeer-review


Relativistic causality imposes rigid restrictions on nondemolition (repeatable) measurements of nonlocal variables. We show that there are no causal restrictions on demolition (nonrepeatable) measurements: all Hermitian operators of multipartite quantum system can be measured instantaneously, provided unlimited supply of entanglement resources.

Original languageEnglish
Pages (from-to)943-949
Number of pages7
JournalJournal of Modern Optics
Issue number7
StatePublished - 2003


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