Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Alessandro S. Villar"'
Assumption-free measurement of the quantum state of light: Exploring the sidebands of intense fields
Autor:
Paulo Nussenzveig, A. S. Coelho, Marcello Martinelli, Alessandro S. Villar, Katiuscia N. Cassemiro, Felippe A. S. Barbosa
Publikováno v:
Physical Review A. 102
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2151920120d109b3c1f6108b37871aa
https://doi.org/10.1103/physreva.102.063705
https://doi.org/10.1103/physreva.102.063705
Autor:
A. S. Coelho, Alessandro S. Villar, Marcelo Martinelli, Luis F. Muñoz-Martínez, Luis Ortiz-Gutiérrez, Felippe A. S. Barbosa, Paulo Nussenzveig
Publikováno v:
Physical review letters. 121(7)
We demonstrate, theoretically and experimentally, the generation of hexapartite modal entanglement by the optical parametric oscillator (OPO) operating above the oscillation threshold. We show that the OPO generates a rich structure of entanglement a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3804a4eea64a3dced3a28b9c4bbc79d7
https://pubmed.ncbi.nlm.nih.gov/30169057
https://pubmed.ncbi.nlm.nih.gov/30169057
Autor:
A. S. Coelho, Luis F. Muñoz-Martínez, Felippe A. S. Barbosa, Marcelo Martinelli, Luis Ortiz-Gutiérrez, Paulo Nussenzveig, Alessandro S. Villar
We measure the complete quantum state for six modes of the electromagnetic field produced by an optical parametric oscillator. The investigation involves the sideband of the intense pump, signal, and idler fields generated by stimulated parametric do
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6b6d25d4c57d512829dbb5460f3b362
http://arxiv.org/abs/1710.02905
http://arxiv.org/abs/1710.02905
Publikováno v:
Applied Physics B. 100:9-13
In the classical theory of electromagnetism, the permittivity and the permeability of free space are constants whose magnitudes do not seem to possess any deeper physical meaning. By replacing the free space of classical physics with the quantum noti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e6a4a98e2f655b5a84ddbb1e49288ea
https://doi.org/10.1007/s00340-010-4069-8
https://doi.org/10.1007/s00340-010-4069-8
Autor:
M. Chwalla, Philipp Schindler, Markus Hennrich, Rainer Blatt, Alessandro S. Villar, Kyoung-Whan Kim, M. Riebe, Thomas Monz
Publikováno v:
Nature Physics. 4:839-842
Entanglement swapping—a protocol for entangling remote quantum systems without the requirement of direct interaction between them—has been implemented in a completely deterministic fashion, allowing to prepare well-defined entangled states on dem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b28dfc780ede6640dde99cc90c53464b
https://doi.org/10.1038/nphys1107
https://doi.org/10.1038/nphys1107
Autor:
Alessandro S. Villar
Publikováno v:
American Journal of Physics. 76:922-929
Very low intensity and phase fluctuations are present in a bright light field such as a laser beam. These subtle quantum fluctuations may be used to encode quantum information. Although intensity is easily measured with common photodetectors, accessi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d9303fa3eb97f3e2baa35074b17c16f
https://doi.org/10.1119/1.2937903
https://doi.org/10.1119/1.2937903
Autor:
Alessandro S. Villar, Kainã T. Pereira, Jefferson G. Filgueiras, Bruna Gabrielly, Luis Ortiz-Gutiérrez, Luis F. Muñoz
We consider the quantum processor based on a chain of trapped ions to propose an architecture wherein the motional degrees of freedom of trapped ions (position and momentum) could be exploited as the computational Hilbert space. We adopt a continuous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9d4bc84e187e44314a09d251266e944
Autor:
Alessandro S. Villar
Publikováno v:
Biblioteca Digital de Teses e Dissertações da USP
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Investigamos as propriedades quânticas dos feixes de luz produzidos pelo oscilador paramétrico ótico (OPO) acima do limiar, tanto experimental quanto teoricamente. Apresentamos a primeira medida de emaranhamento entre os feixes gêmeos, sinal e co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee770029f5468c7a71fbbb113de84411
https://doi.org/10.11606/t.43.2007.tde-15042008-175327
https://doi.org/10.11606/t.43.2007.tde-15042008-175327
Autor:
Alessandro S. Villar, Felippe A. S. Barbosa, Paulo Nussenzveig, Marcelo Martinelli, Katiuscia N. Cassemiro, A. S. Coelho
Gaussian quantum states hold special importance in the continuous variable (CV) regime. In quantum information science, the understanding and characterization of central resources such as entanglement may strongly rely on the knowledge of the Gaussia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9aa055c3029e6b9f8942c88e5bf7ba7
http://arxiv.org/abs/1502.01759
http://arxiv.org/abs/1502.01759
Testing the entanglement of intense beams produced by a non-degenerate optical parametric oscillator
Publikováno v:
Optics Communications. 242:551-563
We propose a direct measurement of the quadrature correlations of signal and idler beams in a non-degenerate optical parametric oscillator operating above threshold. We investigate the experimental limits where quantum correlations can be observed, f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a72f04df5c8c5418ff89e4e022dc3cb
https://doi.org/10.1016/j.optcom.2004.09.006
https://doi.org/10.1016/j.optcom.2004.09.006