| Issue |
Europhys. Lett.
Volume 37, Number 2, January II 1997
|
|
|---|---|---|
| Page(s) | 79 - 84 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i1997-00115-8 | |
| Published online | 01 September 2002 | |
Density matrix from photon number tomography
1
Dipartimento di Matematica e Fisica,
Università di Camerino, I-62032 Camerino, Italy and
Istituto Nazionale di Fisica della Materia, Italy
2
Osservatorio Astronomico di Capodimonte, I-80131 Napoli, Italy
Received:
9
August
1996
Accepted:
22
November
1996
We provide a simple analytic relation which connects the density operator of the radiation field with the number probabilities. The problem of experimentally “sampling” a general matrix element is studied, and the deleterious effects of nonunit quantum efficiency in the detection process are analyzed showing how they can be reduced by using the squeezing technique. The obtained result is particularly useful for intracavity field reconstruction states.
PACS: 03.65.Bz – Foundations, theory of measurement, miscellaneous theories (including Aha ro nov-Bohm effect, Bell inequalities, Berry's phase) / 42.50.Dv – Nonclassical field states; squeezed, antibunched, and sub-Poissonian states; operational definitions of the phase of the field; phase measurements
© EDP Sciences, 1997
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