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D. Valente - One of the best experts on this subject based on the ideXlab platform.
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mach zehnder interferometer with quantum Beamsplitters
Journal of The Optical Society of America B-optical Physics, 2019Co-Authors: N. Almeida, T. Werlang, D. ValenteAbstract:The quantum beamsplitter—a two-level system (TLS) coupled to a one-dimensional continuum of electromagnetic modes—is the most elementary version of a beamsplitter that may not only refract and reflect, but also absorb and then reemit a photon. This raises the question of whether a single-photon pulse, once split by a first quantum beamsplitter, could be made to interfere with a second one. Here, we propose and theoretically analyze a quantum Mach–Zehnder interferometer (QMZ) as formed by two concatenated quantum Beamsplitters. The distinctive feature of our QMZ is its considerable saturability for a single photon, arising from the broadband nature of the pulse. We show that (i) off-resonant monochromatic photons produce classical interference patterns, whereas (ii) resonant broadband pulses erase these patterns, and that (iii) off-resonant broadband pulses always preserve some degree of interference if the two TLSs are oppositely detuned.
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Mach─Zehnder interferometer with quantum Beamsplitters
Journal of The Optical Society of America B-optical Physics, 2019Co-Authors: N. Almeida, T. Werlang, D. ValenteAbstract:The quantum beamsplitter—a two-level system (TLS) coupled to a one-dimensional continuum of electromagnetic modes—is the most elementary version of a beamsplitter that may not only refract and reflect, but also absorb and then reemit a photon. This raises the question of whether a single-photon pulse, once split by a first quantum beamsplitter, could be made to interfere with a second one. Here, we propose and theoretically analyze a quantum Mach–Zehnder interferometer (QMZ) as formed by two concatenated quantum Beamsplitters. The distinctive feature of our QMZ is its considerable saturability for a single photon, arising from the broadband nature of the pulse. We show that (i) off-resonant monochromatic photons produce classical interference patterns, whereas (ii) resonant broadband pulses erase these patterns, and that (iii) off-resonant broadband pulses always preserve some degree of interference if the two TLSs are oppositely detuned.
Jiubin Tan - One of the best experts on this subject based on the ideXlab platform.
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use of conducting inductive meshes with periodic rectangle units as an infrared microwave dual mode detecting beamsplitter
Journal of Optics, 2011Co-Authors: Yongmeng Liu, Jiubin TanAbstract:By optimizing the periods along the x and y axes of conducting inductive meshes with periodic rectangle units to minimize the differences in microwave reflectivity between the perpendicular and parallel polarizations, conducting inductive meshes with periodic rectangle units can be made useful as an infrared/microwave beamsplitter for the construction of a dual-mode detecting system. A conducting inductive rectangle-unit mesh beamsplitter is designed and fabricated using a laser directing writing technique. The microwave reflectivity and infrared transmissivity coefficients of the mesh beamsplitter sample are measured using a scalar network analyzer and a Fourier infrared spectrometer. Measurement and simulation results indicate that the microwave reflectivity and infrared transmissivity coefficients of infrared/microwave mesh beamsplitter are higher than − 1.5 dB and − 0.7 dB, respectively. It can therefore be concluded that conducting inductive meshes with periodic rectangle units can be used as an infrared/microwave beamsplitter in a dual-mode detecting system.
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Use of conducting inductive meshes with periodic rectangle units as an infrared/microwave dual-mode detecting beamsplitter
Journal of Optics, 2011Co-Authors: Yongmeng Liu, Jiubin TanAbstract:By optimizing the periods along the x and y axes of conducting inductive meshes with periodic rectangle units to minimize the differences in microwave reflectivity between the perpendicular and parallel polarizations, conducting inductive meshes with periodic rectangle units can be made useful as an infrared/microwave beamsplitter for the construction of a dual-mode detecting system. A conducting inductive rectangle-unit mesh beamsplitter is designed and fabricated using a laser directing writing technique. The microwave reflectivity and infrared transmissivity coefficients of the mesh beamsplitter sample are measured using a scalar network analyzer and a Fourier infrared spectrometer. Measurement and simulation results indicate that the microwave reflectivity and infrared transmissivity coefficients of infrared/microwave mesh beamsplitter are higher than − 1.5 dB and − 0.7 dB, respectively. It can therefore be concluded that conducting inductive meshes with periodic rectangle units can be used as an infrared/microwave beamsplitter in a dual-mode detecting system.
N. Almeida - One of the best experts on this subject based on the ideXlab platform.
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mach zehnder interferometer with quantum Beamsplitters
Journal of The Optical Society of America B-optical Physics, 2019Co-Authors: N. Almeida, T. Werlang, D. ValenteAbstract:The quantum beamsplitter—a two-level system (TLS) coupled to a one-dimensional continuum of electromagnetic modes—is the most elementary version of a beamsplitter that may not only refract and reflect, but also absorb and then reemit a photon. This raises the question of whether a single-photon pulse, once split by a first quantum beamsplitter, could be made to interfere with a second one. Here, we propose and theoretically analyze a quantum Mach–Zehnder interferometer (QMZ) as formed by two concatenated quantum Beamsplitters. The distinctive feature of our QMZ is its considerable saturability for a single photon, arising from the broadband nature of the pulse. We show that (i) off-resonant monochromatic photons produce classical interference patterns, whereas (ii) resonant broadband pulses erase these patterns, and that (iii) off-resonant broadband pulses always preserve some degree of interference if the two TLSs are oppositely detuned.
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Mach─Zehnder interferometer with quantum Beamsplitters
Journal of The Optical Society of America B-optical Physics, 2019Co-Authors: N. Almeida, T. Werlang, D. ValenteAbstract:The quantum beamsplitter—a two-level system (TLS) coupled to a one-dimensional continuum of electromagnetic modes—is the most elementary version of a beamsplitter that may not only refract and reflect, but also absorb and then reemit a photon. This raises the question of whether a single-photon pulse, once split by a first quantum beamsplitter, could be made to interfere with a second one. Here, we propose and theoretically analyze a quantum Mach–Zehnder interferometer (QMZ) as formed by two concatenated quantum Beamsplitters. The distinctive feature of our QMZ is its considerable saturability for a single photon, arising from the broadband nature of the pulse. We show that (i) off-resonant monochromatic photons produce classical interference patterns, whereas (ii) resonant broadband pulses erase these patterns, and that (iii) off-resonant broadband pulses always preserve some degree of interference if the two TLSs are oppositely detuned.
Yongmeng Liu - One of the best experts on this subject based on the ideXlab platform.
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use of conducting inductive meshes with periodic rectangle units as an infrared microwave dual mode detecting beamsplitter
Journal of Optics, 2011Co-Authors: Yongmeng Liu, Jiubin TanAbstract:By optimizing the periods along the x and y axes of conducting inductive meshes with periodic rectangle units to minimize the differences in microwave reflectivity between the perpendicular and parallel polarizations, conducting inductive meshes with periodic rectangle units can be made useful as an infrared/microwave beamsplitter for the construction of a dual-mode detecting system. A conducting inductive rectangle-unit mesh beamsplitter is designed and fabricated using a laser directing writing technique. The microwave reflectivity and infrared transmissivity coefficients of the mesh beamsplitter sample are measured using a scalar network analyzer and a Fourier infrared spectrometer. Measurement and simulation results indicate that the microwave reflectivity and infrared transmissivity coefficients of infrared/microwave mesh beamsplitter are higher than − 1.5 dB and − 0.7 dB, respectively. It can therefore be concluded that conducting inductive meshes with periodic rectangle units can be used as an infrared/microwave beamsplitter in a dual-mode detecting system.
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Use of conducting inductive meshes with periodic rectangle units as an infrared/microwave dual-mode detecting beamsplitter
Journal of Optics, 2011Co-Authors: Yongmeng Liu, Jiubin TanAbstract:By optimizing the periods along the x and y axes of conducting inductive meshes with periodic rectangle units to minimize the differences in microwave reflectivity between the perpendicular and parallel polarizations, conducting inductive meshes with periodic rectangle units can be made useful as an infrared/microwave beamsplitter for the construction of a dual-mode detecting system. A conducting inductive rectangle-unit mesh beamsplitter is designed and fabricated using a laser directing writing technique. The microwave reflectivity and infrared transmissivity coefficients of the mesh beamsplitter sample are measured using a scalar network analyzer and a Fourier infrared spectrometer. Measurement and simulation results indicate that the microwave reflectivity and infrared transmissivity coefficients of infrared/microwave mesh beamsplitter are higher than − 1.5 dB and − 0.7 dB, respectively. It can therefore be concluded that conducting inductive meshes with periodic rectangle units can be used as an infrared/microwave beamsplitter in a dual-mode detecting system.
Scott Aaronson - One of the best experts on this subject based on the ideXlab platform.
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generation of universal linear optics by any beam splitter
Physical Review A, 2014Co-Authors: Adam Bouland, Scott AaronsonAbstract:In 1994, Reck et al. showed how to realize any unitary transformation on a single photon using a product of Beamsplitters and phaseshifters. Here we show that any single beamsplitter that nontrivially mixes two modes, also densely generates the set of unitary transformations (or orthogonal transformations, in the real case) on the single-photon subspace with m>=3 modes. (We prove the same result for any two-mode real optical gate, and for any two-mode optical gate combined with a generic phaseshifter.) Experimentally, this means that one does not need tunable Beamsplitters or phaseshifters for universality: any nontrivial beamsplitter is universal for linear optics. Theoretically, it means that one cannot produce "intermediate" models of linear optical computation (analogous to the Clifford group for qubits) by restricting the allowed Beamsplitters and phaseshifters: there is a dichotomy; one either gets a trivial set or else a universal set. No similar classification theorem for gates acting on qubits is currently known. We leave open the problem of classifying optical gates that act on three or more modes.
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Any Beamsplitter Generates Universal Quantum Linear Optics
2013Co-Authors: Adam Bouland, Scott AaronsonAbstract:In 1994, Reck et al. showed how to realize any linear-optical unitary transformation using a product of Beamsplitters and phaseshifters. Here we show that any single beamsplitter that nontrivially mixes two modes, also densely generates the set of m × m unitary transformations (or orthogonal transformations, in the real case) on m ≥ 3 modes. (We prove the same result for any 2-mode real optical gate, and for any 2-mode optical gate combined with a generic phaseshifter.) Experimentally, this means that one does not need tunable Beamsplitters or phaseshifters for universality: any nontrivial beamsplitter is universal. Theoretically, it means that one cannot produce “intermediate” models of quantum-optical computation (analogous to the Clifford group for qubits) by restricting the allowed Beamsplitters and phaseshifters: there is a dichotomy; one either gets a trivi al set or else a universal set. No similar classification theorem for gates acting on qubits is currently know n. We leave open the problem of classifying optical gates that act on 3 or more modes.