Bibliografías temáticas / Biphoton state

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Literatura académica sobre el tema "Biphoton state"

Autor: Grafiati
Publicado: 10 de marzo de 2023

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Artículos de revistas sobre el tema "Biphoton state"

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Frolovtsev, Dmitry N., Sergey A. Magnitskiy y Andrey V. Demin. "Quantum tomograph for measurement and characterization of quantum states of biphoton sources". Izmeritel`naya Tekhnika, n.º 4 (abril de 2020): 20–26. http://dx.doi.org/10.32446/0368-1025it.2020-4-20-26.

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The method and prototype of a device for characterizing of biphoton light sources based on spontaneous parametric downdonversion by quantum tomography are described. The prototype is an experimental implementation of a specialized quantum tomograph designed to measure the quantum polarization states of radiation generated by biphoton sources. Specially developed software will determine the statistical characteristics of the measured quantum state, calculate the tomographic and likelihood estimations of the density matrix, calculate the measurement errors of the density matrix elements and evaluate the quality of the quantum state of biphotons.
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Wong, Y.-E., N.-Y. Tsai, W. S. Hiew y H. H. Jen. "Spectral compression and entanglement reduction in the cascaded biphoton state with cavities". Journal of Physics B: Atomic, Molecular and Optical Physics 54, n.º 19 (6 de octubre de 2021): 195501. http://dx.doi.org/10.1088/1361-6455/ac31c7.

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Abstract The cascaded biphoton state generated from a cold atomic ensemble presents one of the strongly correlated resources that can preserve and relay quantum information. Under the four-wave mixing condition, the emitted signal and idler photons from the upper and lower excited states become highly correlated in their traveling directions and entangled in continuous frequency spaces. In this system, we theoretically study the spectral compression of the biphoton source using an external cavity and show the reduction in its frequency entanglement entropy. This indicates, respectively, an improved light absorption efficiency for the idler photon as well as an almost pure biphoton source which is useful in optical quantum networks. We further investigate the limit of the spectral compression that can be achieved by using multiple cavities. Our results show the capability and potential of the biphoton source with external cavities, where the performance of atom-based quantum memory can be enhanced and the entanglement property can be manipulated by tailoring the spectral compression.
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Fedorov, M. V. "State entanglement of biphoton qutrits and ququarts". Bulletin of the Russian Academy of Sciences: Physics 76, n.º 3 (marzo de 2012): 233–36. http://dx.doi.org/10.3103/s1062873812030082.

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Burlakov, A. V., M. V. Chekhova, O. A. Karabutova, D. N. Klyshko y S. P. Kulik. "Polarization state of a biphoton: Quantum ternary logic". Physical Review A 60, n.º 6 (1 de diciembre de 1999): R4209—R4212. http://dx.doi.org/10.1103/physreva.60.r4209.

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Tian, Ying, Wu-Hao Cai, Zi-Xiang Yang, Feng Chen, Rui-Bo Jin y Qiang Zhou. "Hong-Ou-Mandel interference of entangled photons generated under pump-tight-focusing condition". Acta Physica Sinica 71, n.º 5 (2022): 054201. http://dx.doi.org/10.7498/aps.71.20211783.

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Hong-Ou-Mandel (HOM) interference is a non-classical effect of photons and plays an important role in quantum optics. The <i>β</i>-barium borate (BBO) has a high nonlinear efficiency, and is commonly used to generate biphoton states, thereby exhibiting HOM interference. However, in previous experiments, researchers often used band-pass filters, so the resulting spectrum was directly determined by the band-pass filter. As a result, the original spectrum of the BBO crystal, especially the spectrum under tight focusing, was lack of systematic research. In this paper, the biphoton spectral distribution and HOM interference generated by the BBO crystal under the condition of tight focusing are systematically studied for the first time. Theoretical calculations show that using a lens with 50-mm focusing length, the spectral width of the down-converted photons is increased by 7.9 times that of the non-focused case; the width of the HOM interference fringe is reduced to 1/8, and the visibility of the interference fringe increases from 53.0% to 98.7%. We experimentally prepare the energy-time entanglement state by using type-II BBO crystal and perform HOM interference, thereby obtaining the interference visibility of <inline-formula><tex-math id="M2">\begin{document}$(86.6 \pm 1.0)$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="5-20211783_M2.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="5-20211783_M2.png"/></alternatives></inline-formula>%. The increasing of the HOM visibility is due to the improvement of biphoton's spectral symmetry. In addition, the proposed technique by which different spectral distributions are obtained at different incident angles is expected to be applied to the preparation of high-dimensional qudits in the future.
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Lin, Qing. "Bidirectional Mapping between a Biphoton Polarization State and a Single-Photon Two-Qubit State". Chinese Physics Letters 27, n.º 12 (diciembre de 2010): 120302. http://dx.doi.org/10.1088/0256-307x/27/12/120302.

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Chang, T. H., G.-D. Lin y H. H. Jen. "Spectral shaping of the biphoton state from multiplexed thermal atomic ensembles". Journal of Physics B: Atomic, Molecular and Optical Physics 53, n.º 8 (24 de marzo de 2020): 085403. http://dx.doi.org/10.1088/1361-6455/ab7556.

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Kojima, Jun y Quang-Viet Nguyen. "Entangled biphoton virtual-state spectroscopy of the A2Σ+–X2Π system of OH". Chemical Physics Letters 396, n.º 4-6 (octubre de 2004): 323–28. http://dx.doi.org/10.1016/j.cplett.2004.08.051.

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Jeong, Heejeong, Shengwang Du y Na Young Kim. "Proposed narrowband biphoton generation from an ensemble of solid-state quantum emitters". Journal of the Optical Society of America B 36, n.º 3 (14 de febrero de 2019): 646. http://dx.doi.org/10.1364/josab.36.000646.

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Chang, T. H., G.-D. Lin y H. H. Jen. "Spectrally entangled biphoton state of cascade emissions from a Doppler-broadened atomic ensemble". Journal of Physics B: Atomic, Molecular and Optical Physics 52, n.º 13 (13 de junio de 2019): 135501. http://dx.doi.org/10.1088/1361-6455/ab1303.

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Tesis sobre el tema "Biphoton state"

1

Chang, Tzu-Hsuan y 張子軒. "Spectrally entangled biphoton state of cascade emissions from Doppler-broadened atomic ensembles". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/6cb9fz.

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碩士
國立臺灣大學
物理學研究所
107
We theoretically investigate the spectral property of a biphoton state from multi- plexed thermal atomic ensembles. This biphoton state originates from the cascade emissions, which can be generated by two weak pump fields under four-wave mixing condition. Under this condition, a signal photon from the upper transition, chosen in a telecommunication bandwidth, can be generated along with a correlated idler photon from the lower infrared transition. We obtain the spectral property under different superradiant decay rates of the lower transition, excitation pulse du- rations, and temperature of the medium. We can spectrally shape the biphoton state by multiplexing the atomic ensembles with frequency-shifted emissions, where the entropy of entanglement can be analyzed via Schmidt decompositions. We find that this spectral entanglement increases when more vapor cells are multiplexed with correlated or anti-correlated signal and idler fields. The eigenvalues in Schmidt bases approach degenerate under this multiplexing scheme, and corresponding Schmidt numbers can be larger than the number of the multiplexed vapor cells, showing the enlarged entropy of entanglement and excess correlated modes in con- tinuous frequency spaces. We also investigate the lowest entropy of entanglement allowed in the multiplexing scheme, which is preferential for generating a pure single photon source. This shows the potentiality to spectrally shape the bipho- ton source, where high-capacity spectral modes can be applied in long-distance quantum communication and multimode quantum information processing.
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POLYCARPOU, CONSTANTINA. "Adaptive Detection of Arbitrarily Shaped Ultrashort Quantum Light States". Doctoral thesis, 2013. http://hdl.handle.net/2158/807677.

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First we investigate the generation of non-classical states of light by means of pulsed parametric down-conversion, and second their complete diagnostics and characterisation by means of pulsed homodyne detection. We introduce a new characterisation technique of quantum states of light (starting with the case of the single photon) that combines techniques from the fields of quantum optics and ultrafast coherent control: the idea is to generate femtosecond quantum light states with a broad spectrum, and then, through adaptive mapping of their spectro/temporal mode onto the reference field, to completely retrieve the "shape" of the state under investigation, even with no prior information at hand. The possibility of accessing the arbitrarily-shaped spectro/temporal structure of ultrashort quantum light states will allow a leap forward to the encoding and manipulation of quantum information.
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Capítulos de libros sobre el tema "Biphoton state"

1

Fedorov, Mikhail. "Biphoton and Triphoton States, Entanglement, and Schmidt Decompositions". En Springer Series in Chemical Physics, 85–93. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52431-3_8.

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Actas de conferencias sobre el tema "Biphoton state"

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Halevy, Assaf, Eli Megidish, Tomer Shacham, Liat Dovrat y Hagai S. Eisenberg. "Projection of Two Biphoton Qutrits onto a Maximally Entangled State". En Quantum Electronics and Laser Science Conference. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/qels.2011.qtht4.

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Halevy, A., E. Megidish, T. Shacham, L. Dovrat y H. S. Eisenberg. "Projection of Two Biphoton Qutrits onto a Maximally Entangled State". En International Conference on Quantum Information. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/icqi.2011.qtub2.

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3

Fabre, N., G. Maltese, F. Appas, S. Felicetti, A. Ketterer, A. Keller, T. Coudreau et al. "Generation of time-frequency grid state with integrated biphoton frequency combs". En Integrated Photonics Research, Silicon and Nanophotonics. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/iprsn.2021.iw1a.6.

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Kashi, Anahita Khodadad, Benjamin Wetzel y Michael Kues. "Frequency-to-time Mapping-Assisted Spectral Characterization of Parametric Biphoton States". En CLEO: QELS_Fundamental Science. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_qels.2022.fw1a.5.

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A frequency-to-time mapping technique is employed to directly characterize the biphoton state from a pulsed spontaneous parametric process. For the first time a Hanbury Brown and Twiss measurement is performed directly in the frequency domain.
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5

FANG, BIN, Marco Liscidini, John E. Sipe y Virginia Lorenz. "Frequency-Resolved Reconstruction of the Biphoton Polarization State via Stimulated Emission Tomography". En CLEO: QELS_Fundamental Science. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/cleo_qels.2015.fth1a.6.

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Kumar, Ramesh, Vikash Kumar Yadav, Vivek Venkataraman y Joyee Ghosh. "Temporal Properties and Schmidt Decomposition of the Biphoton State in a ppLN Ridge Waveguide". En Frontiers in Optics. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/fio.2021.jw7a.94.

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7

Sharypov, A. V. y A. D. Wilson-Gordon. "Generation of a Narrowband Biphoton in a Two-Level System with an Intermediate Metastable State". En Frontiers in Optics. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/fio.2010.jwa43.

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Crockett, Benjamin, James van Howe, Nicola Montaut, Roberto Morandotti y José Azaña. "Detecting Biphoton States with Enhanced Resolution Through Electro-Optic Gating". En Frontiers in Optics. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/fio.2022.jtu4a.80.

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We demonstrate an electro-optic sampling technique for high-resolution acquisition of few-photon signals. The temporal features of a biphoton distribution are observed with 98 ps resolution using slow detectors with a response extending >1 ns.
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9

Bogdanov, Yu, M. Chekhova, S. Kulik, G. Maslennikov, C. H. Oh y M. K. Tey. "Preparation of arbitrary qutrit state based on biphotons". En Moscow, Russia, editado por Yuri I. Ozhigov. SPIE, 2005. http://dx.doi.org/10.1117/12.620494.

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10

Jones, Daniel E., Brian T. Kirby, Gabriele Riccardi, Cristian Antonelli, Antonio Mecozzi y Michael Brodsky. "Filtering biphoton quantum states to recover quantum information (Conference Presentation)". En Advanced Optical Techniques for Quantum Information, Sensing, and Metrology, editado por Zameer U. Hasan, Philip R. Hemmer y Alan L. Migdall. SPIE, 2020. http://dx.doi.org/10.1117/12.2546684.

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