Weak measurements with orbital-angular-momentum pointer states
10.1103/PhysRevLett.109.040401
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hdl:2117/19143
Tipus de documentArticle
Data publicació2012-07-24
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Abstract
Weak measurements are a unique tool for accessing information about weakly interacting quantum
systems with minimal back action. Joint weak measurements of single-particle operators with pointer
states characterized by a two-dimensional Gaussian distribution can provide, in turn, key information
about quantum correlations that can be relevant for quantum information applications. Here we
demonstrate that by employing two-dimensional pointer states endowed with orbital angular momentum
(OAM), it is possible to extract weak values of the higher order moments of single-particle operators, an
inaccessible quantity with Gaussian pointer states only. We provide a specific example that illustrates the
advantages of our method both in terms of signal enhancement and information retrieval.
CitacióPuentes, G.; Hermosa, N.; Perez, J. Weak measurements with orbital-angular-momentum pointer states. "Physical review letters", 24 Juliol 2012, vol. 109, núm. 4, p. 040401-1-040401-5.
ISSN0031-9007
Versió de l'editorhttp://link.aps.org/doi/10.1103/PhysRevLett.109.040401
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