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Yamamoto's scientific focuses in the 1980s were coherent optical fiber communications, photon number squeezing in semiconductor lasers, quantum non-demolition (QND) measurements and other experimental quantum optics subjects. Some of Yamamoto's key works from this era are proposals for how to physically realize photon-number squeezing,QND measurement,and a quantum computer using photons.His most prominent work in the 1990s is in semiconductor cavity quantum electrodynamics (especially involving microcavities and quantum wells) and quantum transport effects in mesoscopic devices.
During the 2000s, his most important work was on the development of optically-active quantum dots as a platform for quantum information processing (both as single-photon sources for quantum cryptography,and as hosts for spin qubits.Another important work was on exciton-polariton condensation effects.Yamamoto was also active in the development of security theory and realization of quantum key distribution protocols.Landmark papers from this era include the demonstration of indistinguishable photons from a single quantum dot;the proposal for biexciton cascade as a method for generating entangled photons (for QKD) from a single quantum dot this is the proposal underlying essentially all QD entangled-photon sources, such as those reviewed in ), and control of a single spin qubit in a quantum dot using optical pulses.
During the 2010s, his work has continued on exploring quantum dots as a platform for building both quantum repeaters and quantum computers. One highlight was the co-first demonstration (with Ataç İmamoğlu's group at ETH) of entanglement between a spin in a quantum dot and a photon emitted by it. Work on exciton-polaritons continued. Since 2012, Yamamoto has studied the required number of physical qubits and expected computational time in quantum computer and pioneered the development of a novel quantum optical computer, called coherent Ising machine inspired by developments in digital coherent optical communications and degenerate optical parametric oscillators.
During the 2000s, his most important work was on the development of optically-active quantum dots as a platform for quantum information processing (both as single-photon sources for quantum cryptography,and as hosts for spin qubits.Another important work was on exciton-polariton condensation effects.Yamamoto was also active in the development of security theory and realization of quantum key distribution protocols.Landmark papers from this era include the demonstration of indistinguishable photons from a single quantum dot;the proposal for biexciton cascade as a method for generating entangled photons (for QKD) from a single quantum dot this is the proposal underlying essentially all QD entangled-photon sources, such as those reviewed in ), and control of a single spin qubit in a quantum dot using optical pulses.
During the 2010s, his work has continued on exploring quantum dots as a platform for building both quantum repeaters and quantum computers. One highlight was the co-first demonstration (with Ataç İmamoğlu's group at ETH) of entanglement between a spin in a quantum dot and a photon emitted by it. Work on exciton-polaritons continued. Since 2012, Yamamoto has studied the required number of physical qubits and expected computational time in quantum computer and pioneered the development of a novel quantum optical computer, called coherent Ising machine inspired by developments in digital coherent optical communications and degenerate optical parametric oscillators.
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Mastiyage Don Sudeera Hasaranga Gunathilaka,Yoshitaka Inui,Satoshi Kako,Kazushi Mimura,Masato Okada,Yoshihisa Yamamoto,Toru Aonishi
arxiv(2024)
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JOURNAL OF THE PHYSICAL SOCIETY OF JAPANno. 4 (2023)
ADVANCES IN OPTICS AND PHOTONICSno. 2 (2023): 385-441
ADVANCED OPTICAL MATERIALSno. 1 (2023)
2023 Conference on Lasers and Electro-Optics (CLEO)pp.1-2, (2023)
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Scientific reportsno. 1 (2023): 16140
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