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4 papers · 2 filters
High-visibility nonclassical interference between pure heralded single photons and weak coherent photons
Rui-Bo Jin, Jun Zhang, Ryosuke Shimizu +4
We present an experiment of nonclassical interference between a pure heralded single-photon state and a weak coherent state. Our experiment is the first to demonstrate that spectra…
Macroscopic quantum tunneling in multigap superconducting Josephson junctions: Escape rate enhancement via quantum fluctuations of Josephson-Leggett mode
Yukihiro Ota, Masahiko Machida, Tomio Koyama
We theoretically study the macroscopic quantum tunneling (MQT) in a hetero Josephson junction formed by a conventional single-gap superconductor and a multi-gap one such as ${MgB}_…
Universal coding for transmission of private information
Nilanjana Datta, Min-Hsiu Hsieh
We consider the scenario in which Alice transmits private classical messages to Bob via a classical-quantum channel, part of whose output is intercepted by an eavesdropper, Eve. We…
Quantum frequency downconversion experiment
Hiroki Takesue
We report the first quantum frequency downconversion experiment. Using the difference frequency generation process in a periodically poled lithium niobate waveguide, we successfull…