論文リスト

@article{nokey,

title = {Quantum frequency conversion using 4-port fiber-pigtailed PPLN module},

author = {Shoichi Murakami, Rintaro Fujimoto, Toshiki Kobayashi, Rikizo Ikuta, Asuka Inoue, Takeshi Umeki, Shigehito Miki, Fumihiro China, Hirotaka Terai, Ryoichi Kasahara, Tetsuya Mukai, Nobuyuki Imoto, and Takashi Yamamoto},

url = {https://doi.org/10.1364/OE.494313 },

doi = {https://doi.org/10.1364/OE.494313 },

year  = {2023},

date = {2023-08-17},

urldate = {2023-08-17},

journal = {Optics Express},

volume = {31},

issue = {18},

pages = {29271-29279},

keywords = {entanglement, multi-photon interference, optomechanics, quantum frequency conversion},

pubstate = {published},

tppubtype = {article}

}

@article{Tsujimoto:23,

title = {Quantum State Tomography of Qudits via Hong-Ou-Mandel Interference},

author = {Yoshiaki Tsujimoto and Rikizo Ikuta and Kentaro Wakui and Toshiki Kobayashi and Mikio Fujiwara},

url = {https://link.aps.org/doi/10.1103/PhysRevApplied.19.014008},

doi = {10.1103/PhysRevApplied.19.014008},

year  = {2023},

date = {2023-01-04},

urldate = {2023-01-01},

journal = {Physical Review Applied},

volume = {19},

issue = {1},

pages = {014008},

publisher = {American Physical Society},

abstract = {We propose a method to perform the quantum state tomography (QST) of an n-partite qudit state embedded in single photons based on the Hong-Ou-Mandel interference between the target photon and ancillary probe light. Our method requires only passive beam splitters in the target modes by shifting all of the active devices used in conventional QST methods to the probe preparation system. This feature is useful when the active optical devices for QST have large optical losses. Moreover, even when the probe is prepared by a laser light having a mode mismatch with the target photon, the method offers an accurate estimation of the target state. As a proof-of-principle, we perform the experimental demonstration using a polarization qubit. Regardless of the photon statistics of the probe light, the estimated results of state reconstruction are as accurate as those verified by the conventional QST.},

keywords = {multi-photon interference},

pubstate = {published},

tppubtype = {article}

}

@article{Ikuta:22,

title = {Wave-particle duality of light appearing in an intensity interferometric scenario},

author = {Rikizo Ikuta},

url = {https://opg.optica.org/oe/abstract.cfm?URI=oe-30-26-46972},

doi = {10.1364/OE.474766},

year  = {2022},

date = {2022-12-09},

urldate = {2022-12-09},

journal = {Optics Express},

volume = {30},

number = {26},

pages = {46972--46981},

publisher = {Optica Publishing Group},

abstract = {A single photon exhibits wave-particle duality in the Young’s double-slit interferometer. The duality characterized by an interference visibility and a which-path information has trade-off relation known as complementarity. These quantities are related to the first-order coherence, and the interference is based on the phase correlation between lights coming from two arms. However according to quantum optics theory, such a simple wave-particle picture is not enough to understand the nature because the theory showed an importance of higher-order coherence in the sense of both interference and statistical distribution of photons. Second-order intensity correlation is especially crucial to reveal distinctive quantum features of photons with no classical analogue. Here, in an intensity interferometric scenario as represented by the Hong-Ou-Mandel interferometer, we discuss a wave-particle duality of light based on a which-path information and a quantity characterizing a magnitude of the intensity interferometric effect. We show, for classical light, the two quantities obey the complementary principle similar to the case of the double-slit experiment, but do not for nonclassical light. The nonclassical light such as photons at two arms is allowed to show larger which-path information and intensity interference simultaneously beyond the complementary relation. Moreover, the violation reveals a new nonclassical nature of light although both of the above two quantities seem to be understandable classically, which is never found from a consideration of only one side of wave-particle duality.},

keywords = {multi-photon interference},

pubstate = {published},

tppubtype = {article}

}

@article{tsujimoto2018high,

title = {High-fidelity entanglement swapping and generation of three-qubit GHZ state using asynchronous telecom photon pair sources},

author = {Yoshiaki Tsujimoto and Motoki Tanaka and Nobuo Iwasaki and Rikizo Ikuta and Shigehito Miki and Taro Yamashita and Hirotaka Terai and Takashi Yamamoto and Masato Koashi and Nobuyuki Imoto},

doi = {10.1038/s41598-018-19738-8},

year  = {2018},

date = {2018-01-23},

journal = {Scientific reports},

volume = {8},

number = {1},

pages = {1446},

publisher = {Nature Publishing Group},

keywords = {multi-photon interference},

pubstate = {published},

tppubtype = {article}

}

@article{ikuta2017experimental,

title = {Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light},

author = {Rikizo Ikuta and Shota Nozaki and Takashi Yamamoto and Masato Koashi and Nobuyuki Imoto},

doi = {10.1038/s41598-017-05008-6},

year  = {2017},

date = {2017-05-01},

journal = {Scientific Reports},

volume = {7},

number = {1},

pages = {4819},

publisher = {Nature Publishing Group},

keywords = {multi-photon interference},

pubstate = {published},

tppubtype = {article}

}

@article{Tsujimoto:17,

title = {High visibility Hong-Ou-Mandel interference via a time-resolved coincidence measurement},

author = {Yoshiaki Tsujimoto and Yukihiro Sugiura and Motoki Tanaka and Rikizo Ikuta and Shigehito Miki and Taro Yamashita and Hirotaka Terai and Mikio Fujiwara and Takashi Yamamoto and Masato Koashi and Masahide Sasaki and Nobuyuki Imoto},

url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-25-11-12069},

doi = {10.1364/OE.25.012069},

year  = {2017},

date = {2017-05-01},

journal = {Opt. Express},

volume = {25},

number = {11},

pages = {12069--12080},

publisher = {OSA},

abstract = {A high visibility Hong-Ou-Mandel (HOM) interference between two independently prepared photons plays an important role in various photonic quantum information processing. In a standard HOM experiment using photons generated by pulse-pumped spontaneous parametric down conversion (SPDC), larger detection time windows than the coherence time of photons have been employed for measuring the HOM visibility and/or drawing the HOM dip. If large amounts of stray photons continuously exist within the detection time windows, employing small detection time windows is favorable for reducing the effect of background noises. Especially, such a setup is helpful for the HOM experiment using continuous wave (cw)-pumped SPDC and the time-resolved coincidence measurement. Here we argue that the method for determining the HOM visibility used in the previous cw experiments tends to suffer from distortion arising from biased contribution of the background noises. We then present a new method with unbiased treatment of the cw backgrounds. By using this method, we experimentally demonstrate a high visibility HOM interference of two heralded telecom photons independently generated by SPDC with employing cw pump light. An observed HOM visibility is 0.87 ± 0.04, which is as high as those observed by using pulse-pumped SPDC photons.},

keywords = {multi-photon interference},

pubstate = {published},

tppubtype = {article}

}

@article{PhysRevLett.95.040503,

title = {Faithful Qubit Distribution Assisted by One Additional Qubit against Collective Noise},

author = {Takashi Yamamoto and Junichi Shimamura and {Ş}ahin K Özdemir and Masato Koashi and Nobuyuki Imoto},

url = {https://link.aps.org/doi/10.1103/PhysRevLett.95.040503},

doi = {10.1103/PhysRevLett.95.040503},

year  = {2005},

date = {2005-07-01},

journal = {Phys. Rev. Lett.},

volume = {95},

pages = {040503},

publisher = {American Physical Society},

keywords = {multi-photon interference},

pubstate = {published},

tppubtype = {article}

}

@article{PhysRevA.71.030301,

title = {Simple experimental scheme of preparing a four-photon entangled state for the teleportation-based realization of a linear optical controlled-NOT gate},

author = {Yuuki Tokunaga and Takashi Yamamoto and Masato Koashi and Nobuyuki Imoto},

url = {https://link.aps.org/doi/10.1103/PhysRevA.71.030301},

doi = {10.1103/PhysRevA.71.030301},

year  = {2005},

date = {2005-03-01},

journal = {Phys. Rev. A},

volume = {71},

pages = {030301},

publisher = {American Physical Society},

keywords = {multi-photon interference},

pubstate = {published},

tppubtype = {article}

}

@article{sahin2003,

title = {Quantum state generation and entanglement manipulation using linear optics},

author = {{Ş}ahin K Özdemir and Takashi Yamamoto and Masato Koashi and Nobuyuki Imoto},

year  = {2003},

date = {2003-09-01},

journal = {Turkish Journal of Physics},

volume = {27},

pages = {459 - 479},

keywords = {multi-photon interference},

pubstate = {published},

tppubtype = {article}

}

@article{Koashi2001,

title = {Probabilistic manipulation of entangled photons},

author = {Masato Koashi and Takashi Yamamoto and Nobuyuki Imoto},

url = {https://doi.org/10.1103/PhysRevA.63.030301},

doi = {10.1103/PhysRevA.63.030301},

year  = {2001},

date = {2001-02-12},

journal = {Phys. Rev. A},

volume = {63},

number = {030301(R)},

keywords = {entanglement, multi-photon interference},

pubstate = {published},

tppubtype = {article}

}