|
related topics |
{measurement, state, measurements} |
{state, states, coherent} |
{time, decoherence, evolution} |
{energy, gaussian, time} |
{entanglement, phys, rev} |
{wave, scattering, interference} |
{state, phys, rev} |
|
Nonclassical Properties of Coherent States
Lars M. Johansen
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.
- oai_identifier:
- oai:arXiv.org:quant-ph/0309025
- categories:
- quant-ph
- comments:
- 4 pages. Some arguments rewritten, reference added to
quant-ph/0402050. Conclusion unchanged
- doi:
- 10.1016/j.physleta.2004.07.003
- arxiv_id:
- quant-ph/0309025
- journal_ref:
- Phys. Lett. A 329 (2004) 184-187
- created:
- 2003-09-02
- updated:
- 2004-02-07
Full article ▸
|
|
related documents |
0003067v1 |
0003053v3 |
0006089v1 |
0306192v3 |
0701162v3 |
0409086v2 |
9801067v1 |
0503017v4 |
9807021v1 |
0209168v2 |
0403123v1 |
0503206v2 |
0603024v2 |
0605200v1 |
0703040v3 |
0203035v1 |
0001065v1 |
0112154v1 |
0702165v2 |
0703124v2 |
0502093v1 |
0605213v2 |
0508012v2 |
0501058v1 |
0502033v3 |
|