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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Assumption-free measurement of the quantum state of light: Exploring the sidebands of intense fields

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Barbosa, F. A. S. [1] ; Coelho, A. S. [2, 3] ; Cassemiro, K. N. [4] ; Martinelli, M. [5] ; Nussenzveig, P. [5] ; Villar, A. S. [4]
Total Authors: 6
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Univ Fed Piaui, Dept Engn Mecan, BR-64049550 Teresina, PI - Brazil
[3] Ctr Univ UNINOVAFAPI, Dept Engn, BR-64073505 Teresina, PI - Brazil
[4] Amer Phys Soc, 1 Res Rd, Ridge, NY 11961 - USA
[5] Univ Sao Paulo, Inst Fis, POB 66318, BR-05315970 Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Physical Review A; v. 102, n. 6 DEC 7 2020.
Web of Science Citations: 0

The quantum noise in photocurrent fluctuations usually gives incomplete information about the quantum state of spectral sideband modes of bright light beams involved in the detection. Each frequency component of the noise spectrum corresponds to two sideband modes symmetrically located around the bright optical field. In the case of the usual homodyne detection, it limits the ability to recover discriminated information of each mode involved. We theoretically show that complete reconstruction of the two-mode quantum state can be obtained by using phase-locked (coherent) resonator detection, even for non-Gaussian states. We experimentally demonstrate the technique by measuring a two-mode displaced coherent state. (AU)

FAPESP's process: 10/08448-2 - Quantum information with continuous variables of atoms and light
Grantee:Paulo Alberto Nussenzveig
Support type: Research Projects - Thematic Grants
FAPESP's process: 09/52157-5 - Teleportation of quantum information between different colors
Grantee:Marcelo Martinelli
Support type: Regular Research Grants
FAPESP's process: 10/52282-1 - Quantum information processing with continuous variables
Grantee:Marcelo Martinelli
Support type: Regular Research Grants
FAPESP's process: 15/18834-0 - Exploring quantum information with atoms, crystals and chips
Grantee:Marcelo Martinelli
Support type: Research Projects - Thematic Grants