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Peer-reviewedCC BYPhysical Review A

Four-photon subtraction from picosecond squeezed vacuum demonstrating Wigner negativity without loss correction

  • Mamoru Endo1,2
  • Takefumi Nomura2
  • Tatsuki Sonoyama2
  • Kazuma Takahashi2
  • Sachiko Takasu3
  • Daiji Fukuda4,3
  • Takahiro Kashiwazaki5
  • Asuka Inoue5
  • Takeshi Umeki5
  • Rajveer Nehra2,6
  • Petr Marek7
  • Radim Filip7
3 more authors
  • Kan Takase1,2
  • Warit Asavanant1,2
  • Akira Furusawa1,2
7 affiliations
  1. 1RIKEN Center for Quantum Computing
  2. 2The University of Tokyo
  3. 3National Institute of Advanced Industrial Science and Technology
  4. 4AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory
  5. 5NTT
  6. 6University of Massachusetts Amherst
  7. 7Palacky University
Open at sourceDOICite

Abstract

Multiphoton subtraction from a traveling squeezed vacuum is a standard route to non-Gaussian optical-state engineering. High state-generation rates call for ultrashort optical pulses driven by high-repetition-rate lasers, but combining higher-order subtraction with ultrashort pulsed light and full state reconstruction remains challenging. Here we demonstrate up to four-photon subtraction from 10-ps squeezed-vacuum wave packets generated by a broadband waveguide optical parametric amplifier. Using a Ti-Au transition-edge sensor for photon-number-resolved heralding and homodyne tomography on the signal mode, we reconstruct the generated states up to the four-photon-subtracted case. The reconstructed states exhibit clear parity-dependent structure and visible Wigner-function negativity without loss correction. These results extend the experimentally accessible regime of multiphoton subtraction in broadband traveling optical modes and establish a platform for non-Gaussian optical resource-state engineering in continuous-variable quantum optics.

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Cite

BibTeXRIS
BibTeX
@article{endo2026fourphoton,
  title = {{Four-photon subtraction from picosecond squeezed vacuum demonstrating Wigner negativity without loss correction}},
  author = {Mamoru Endo and Takefumi Nomura and Tatsuki Sonoyama and Kazuma Takahashi and Sachiko Takasu and Daiji Fukuda and Takahiro Kashiwazaki and Asuka Inoue and Takeshi Umeki and Rajveer Nehra and Petr Marek and Radim Filip and Kan Takase and Warit Asavanant and Akira Furusawa},
  journal = {Physical Review A},
  year = {2026},
  month = jul,
  doi = {10.1103/6tlg-7qgm},
  url = {https://doi.org/10.1103/6tlg-7qgm},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Four-photon subtraction from picosecond squeezed vacuum demonstrating Wigner negativity without loss correction
AU  - Mamoru Endo
AU  - Takefumi Nomura
AU  - Tatsuki Sonoyama
AU  - Kazuma Takahashi
AU  - Sachiko Takasu
AU  - Daiji Fukuda
AU  - Takahiro Kashiwazaki
AU  - Asuka Inoue
AU  - Takeshi Umeki
AU  - Rajveer Nehra
AU  - Petr Marek
AU  - Radim Filip
AU  - Kan Takase
AU  - Warit Asavanant
AU  - Akira Furusawa
PY  - 2026
DA  - 2026/07/13
JO  - Physical Review A
DO  - 10.1103/6tlg-7qgm
UR  - https://doi.org/10.1103/6tlg-7qgm
AB  - Multiphoton subtraction from a traveling squeezed vacuum is a standard route to non-Gaussian optical-state engineering. High state-generation rates call for ultrashort optical pulses driven by high-repetition-rate lasers, but combining higher-order subtraction with ultrashort pulsed light and full state reconstruction remains challenging. Here we demonstrate up to four-photon subtraction from 10-ps squeezed-vacuum wave packets generated by a broadband waveguide optical parametric amplifier. Using a Ti-Au transition-edge sensor for photon-number-resolved heralding and homodyne tomography on the signal mode, we reconstruct the generated states up to the four-photon-subtracted case. The reconstructed states exhibit clear parity-dependent structure and visible Wigner-function negativity without loss correction. These results extend the experimentally accessible regime of multiphoton subtraction in broadband traveling optical modes and establish a platform for non-Gaussian optical resource-state engineering in continuous-variable quantum optics.
SN  - 0556-2791
SN  - 1050-2947
SN  - 1094-1622
SN  - 1538-4446
SN  - 2469-9926
SN  - 2469-9934
SN  - 2469-9942
ER  -