Practical measurement of joint weak values and their connection to the annihilation operator

Weak measurements are a new tool for characterizing post-selected quantum systems during their evolution. Weak measurement was originally formulated in terms of von Neumann interactions which are practically available for only the simplest single-particle observables. In the present work, we extend...

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Bibliographic Details
Published in:Physics letters. A 2005-01, Vol.334 (5), p.337-344
Main Authors: Lundeen, J.S., Resch, K.J.
Format: Article
Language:English
Subjects:
Annihilation operator
Entanglement
Post-selection
Weak measurement
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Summary:Weak measurements are a new tool for characterizing post-selected quantum systems during their evolution. Weak measurement was originally formulated in terms of von Neumann interactions which are practically available for only the simplest single-particle observables. In the present work, we extend and greatly simplify a recent, experimentally feasible, reformulation of weak measurement for multiparticle observables [Phys. Rev. Lett. 92 (2004) 130402]. We also show that the resulting “joint weak values” take on a particularly elegant form when expressed in terms of annihilation operators.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2004.11.037