Projective measurement onto arbitrary superposition of weak coherent state bases

Research output: Contribution to journalJournal article – Annual report year: 2018Researchpeer-review

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Projective measurement onto arbitrary superposition of weak coherent state bases. / Izumi, Shuro; Takeoka, Masahiro; Wakui, Kentaro; Fujiwara, Mikio; Ema, Kazuhiro; Sasaki, Masahide.

In: Scientific Reports, Vol. 8, No. 1, 2999, 2018.

Research output: Contribution to journalJournal article – Annual report year: 2018Researchpeer-review

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Author

Izumi, Shuro ; Takeoka, Masahiro ; Wakui, Kentaro ; Fujiwara, Mikio ; Ema, Kazuhiro ; Sasaki, Masahide. / Projective measurement onto arbitrary superposition of weak coherent state bases. In: Scientific Reports. 2018 ; Vol. 8, No. 1.

Bibtex

@article{b0d8fdc7f05f4aff8bb108f5b3350c12,
title = "Projective measurement onto arbitrary superposition of weak coherent state bases",
abstract = "One of the peculiar features in quantum mechanics is that a superposition of macroscopically distinct states can exist. In optical system, this is highlighted by a superposition of coherent states (SCS), i.e. a superposition of classical states. Recently this highly nontrivial quantum state and its variant have been demonstrated experimentally. Here we demonstrate the superposition of coherent states in quantum measurement which is also a key concept in quantum mechanics. More precisely, we propose and implement a projection measurement onto an arbitrary superposition of two weak coherent states in optical system. The measurement operators are reconstructed experimentally by a novel quantum detector tomography protocol. Our device is realized by combining the displacement operation and photon counting, well established technologies, and thus has implications in various optical quantum information processing applications.",
author = "Shuro Izumi and Masahiro Takeoka and Kentaro Wakui and Mikio Fujiwara and Kazuhiro Ema and Masahide Sasaki",
year = "2018",
doi = "10.1038/s41598-018-21092-8",
language = "English",
volume = "8",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
number = "1",

}

RIS

TY - JOUR

T1 - Projective measurement onto arbitrary superposition of weak coherent state bases

AU - Izumi, Shuro

AU - Takeoka, Masahiro

AU - Wakui, Kentaro

AU - Fujiwara, Mikio

AU - Ema, Kazuhiro

AU - Sasaki, Masahide

PY - 2018

Y1 - 2018

N2 - One of the peculiar features in quantum mechanics is that a superposition of macroscopically distinct states can exist. In optical system, this is highlighted by a superposition of coherent states (SCS), i.e. a superposition of classical states. Recently this highly nontrivial quantum state and its variant have been demonstrated experimentally. Here we demonstrate the superposition of coherent states in quantum measurement which is also a key concept in quantum mechanics. More precisely, we propose and implement a projection measurement onto an arbitrary superposition of two weak coherent states in optical system. The measurement operators are reconstructed experimentally by a novel quantum detector tomography protocol. Our device is realized by combining the displacement operation and photon counting, well established technologies, and thus has implications in various optical quantum information processing applications.

AB - One of the peculiar features in quantum mechanics is that a superposition of macroscopically distinct states can exist. In optical system, this is highlighted by a superposition of coherent states (SCS), i.e. a superposition of classical states. Recently this highly nontrivial quantum state and its variant have been demonstrated experimentally. Here we demonstrate the superposition of coherent states in quantum measurement which is also a key concept in quantum mechanics. More precisely, we propose and implement a projection measurement onto an arbitrary superposition of two weak coherent states in optical system. The measurement operators are reconstructed experimentally by a novel quantum detector tomography protocol. Our device is realized by combining the displacement operation and photon counting, well established technologies, and thus has implications in various optical quantum information processing applications.

U2 - 10.1038/s41598-018-21092-8

DO - 10.1038/s41598-018-21092-8

M3 - Journal article

VL - 8

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

IS - 1

M1 - 2999

ER -