Quantum state reconstruction of spectral field modes: Homodyne and resonator detection schemes

Autor(es)

Barbosa, F. A. S. ^[1] ; Coelho, A. S. ^[1] ; Cassemiro, K. N. ^[2] ; Nussenzveig, P. ^[1] ; Fabre, C. ^[3] ; Villar, A. S. ^[2] ; Martinelli, M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil

^[2] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE - Brazil

^[3] Univ Paris 06, Lab Kastler Brossel, F-75252 Paris - France

• Tipo de documento: Artigo Científico
• Fonte: Physical Review A; v. 88, n. 5 NOV 14 2013.
• Citações Web of Science: 8

Resumo

We revisit the problem of quantum state reconstruction of light beams from the photocurrent quantum noise. As is well known, but often overlooked, two longitudinal field modes contribute to each spectral component of the photocurrent (sideband modes). We show that spectral homodyne detection is intrinsically incapable of providing all the information needed for the full reconstruction of the two-mode spectral quantum state. Such a limitation is overcome by the technique of resonator detection. A detailed theoretical description and comparison of both methods is presented, as well as an experiment to measure the six-mode quantum state of pump-signal-idler beams of an optical parametric oscillator above the oscillation threshold. (AU)

• Processo FAPESP: 10/08448-2 - Informação quântica com variáveis contínuas de átomos e luz
• Beneficiário: Paulo Alberto Nussenzveig
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 09/52157-5 - Teletransporte de informação quântica entre diferentes cores
• Beneficiário: Marcelo Martinelli
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/52282-1 - Quantum information processing with continuous variables
• Beneficiário: Marcelo Martinelli
• Linha de fomento: Auxílio à Pesquisa - Regular