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related topics |
{states, state, optimal} |
{state, states, coherent} |
{equation, function, exp} |
{state, states, entangled} |
{group, space, representation} |
{photon, photons, single} |
{energy, gaussian, time} |
{light, field, probe} |
{error, code, errors} |
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Characterization of tomographically faithful states in terms of their
Wigner function
G. M. D'Ariano, M. F. Sacchi
abstract: A bipartite quantum state is tomographically faithful when it can be used as
an input of a quantum operation acting on one of the two quantum systems, such
that the joint output state carries a complete information about the operation
itself. Tomographically faithful states are a necessary ingredient for
tomography of quantum operations and for complete quantum calibration of
measuring apparatuses. In this paper we provide a complete classification of
such states for continuous variables in terms of the Wigner function of the
state. For two-mode Gaussian states faithfulness simply resorts to correlation
between the modes.
- oai_identifier:
- oai:arXiv.org:quant-ph/0503022
- categories:
- quant-ph
- comments:
- 9 pages. IOPAMS style. Some improvements
- doi:
- 10.1088/1464-4266/7/10/030
- arxiv_id:
- quant-ph/0503022
- journal_ref:
- J. Opt. B 7, S408 (2005)
- created:
- 2005-03-02
- updated:
- 2005-08-22
Full article ▸
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