Boosting the generation rate of squeezed single-photon states by generalized photon subtraction
In optical quantum information processing with continuous variables, optical non-Gaussian quantum states are essential for universal and fault-tolerant quantum computation. Experimentally, their most typical generation method is photon subtraction (PS), where single-photon detection by an on/off detector probabilistically heralds the generation of squeezed single-photon states. In PS, however, trying to avoid unwanted multiphoton detection inevitably limits the generation rate, hindering the application of squeezed single-photon states. Here, we theoretically show that generalized photon subtraction (GPS), a simple extension of PS, can improve the generation rate while maintaining the quality of the generated states. Furthermore, we experimentally demonstrate the generation rate improvement for 2-dB- and 4-dB-squeezed single-photon states compared to PS, by more than one order of magnitude, particularly for the case of 2 dB. Our results will accelerate the application of squeezed single-photon states to more advanced quantum information protocols.
Authors
- Jun Harada
- Shuntaro Takeda (ORCID: https://orcid.org/0000-0003-2818-5564)
- Hirotaka Terai (ORCID: https://orcid.org/0000-0002-5575-2221)
- Takahiro Kashiwazaki (ORCID: https://orcid.org/0000-0002-4601-047X)
- Daichi Okuno (ORCID: https://orcid.org/0009-0008-6508-8329)
- Kan Takase (ORCID: https://orcid.org/0000-0003-4017-8332)
- Takeshi Umeki (ORCID: https://orcid.org/0000-0002-5787-5911)
- Hiroko Tomoda (ORCID: https://orcid.org/0000-0003-4343-8566)
- Fumihiro China (ORCID: https://orcid.org/0000-0003-2144-8229)
- Shigehito Miki (ORCID: https://orcid.org/0000-0001-5575-6532)
- Masahiro Yabuno (ORCID: https://orcid.org/0000-0002-6436-1636)
- Akihiro Machinaga
Institutions
- NTT (Japan) (JP)
- Computing Center (RU)
- RIKEN Center for Quantum Computing
- The University of Tokyo (JP)
- National Institute of Information and Communications Technology (JP)
Publication Details
- Journal
- Physical review. A/Physical review, A
- Published
- 2024-09-23
- DOI
- https://doi.org/10.1103/physreva.110.033717
- Citations
- 9
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 3.13
Funders
- Ministry of Education, Culture, Sports, Science and Technology
- University of Tokyo
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency