Observation and Manipulation of Optical Parametric Downconversion in the Langevin Regime

ORAL

Abstract

Quantum fluctuation plays a key role in parametric down-conversion in the Langevin regime. In this Letter, we report the experimental realization of optical parametric down-conversion in the Langevin regime on a chip. By precisely controlling the loss inherently tied to fluctuation, we observe the asymmetric Hong-Ou-Mandel dip—a hallmark of quantum fluctuation in the fluctuation-driven parametric down-conversion (PDC)—and the fluctuation-induced compression of single photons by nearly one order of magnitude. These findings pave the way for the manipulation of quantum fluctuation, quantum states, and system-reservoir interaction.

*This work was supported by the National Science and Technology Council of Taiwan (113-2119-M-007-012) and the Ministry of Education of Taiwan (Top Research Centers in Taiwan Key Fields Program).

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Publication: Phys. Rev. Lett. 135, 203601

Presenters

  • Chun-Yuan Cheng

    • Department of Physics and Center for Quantum Science and Technology, National Tsing Hua University

Authors

  • Chun-Yuan Cheng

    • Department of Physics and Center for Quantum Science and Technology, National Tsing Hua University

  • Yen-Ju Chen

    • Department of Physics and Center for Quantum Science and Technology, National Tsing Hua University

  • Tien-Dat Pham

    • Department of Optics and Photonics, National Central University

  • Tzu-An Chen

    • Department of Physics and Center for Quantum Science and Technology, National Tsing Hua University

  • Chang-Hau Kuo

    • Department of Physics and Center for Quantum Science and Technology, National Tsing Hua University

  • Yen-Hung Chen

    • Department of Optics and Photonics, National Central University

  • Chih-Sung Chuu

    • Department of Physics and Center for Quantum Science and Technology, National Tsing Hua University