dorsal/arxiv
View SchemaNonclassical Properties of Coherent States
| Authors | Lars M. Johansen |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0309025 |
| URL | https://arxiv.org/abs/quant-ph/0309025 |
| DOI | 10.1016/j.physleta.2004.07.003 |
| Journal | Phys. Lett. A 329 (2004) 184-187 |
Abstract
It is demonstrated that a weak measurement of the squared quadrature observable may yield negative values for coherent states. This result cannot be reproduced by a classical theory where quadratures are stochastic $c$-numbers. The real part of the weak value is a conditional moment of the Margenau-Hill distribution. The nonclassicality of coherent states can be associated with negative values of the Margenau-Hill distribution. A more general type of weak measurement is considered, where the pointer can be in an arbitrary state, pure or mixed.
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"abstract": "It is demonstrated that a weak measurement of the squared quadrature\nobservable may yield negative values for coherent states. This result cannot be\nreproduced by a classical theory where quadratures are stochastic $c$-numbers.\nThe real part of the weak value is a conditional moment of the Margenau-Hill\ndistribution. The nonclassicality of coherent states can be associated with\nnegative values of the Margenau-Hill distribution. A more general type of weak\nmeasurement is considered, where the pointer can be in an arbitrary state, pure\nor mixed.",
"arxiv_id": "quant-ph/0309025",
"authors": [
"Lars M. Johansen"
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"doi": "10.1016/j.physleta.2004.07.003",
"journal_ref": "Phys. Lett. A 329 (2004) 184-187",
"title": "Nonclassical Properties of Coherent States",
"url": "https://arxiv.org/abs/quant-ph/0309025"
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