Bright single photons for light-matter interaction

Wu, Chih-Hsiang; Wu, Tsung-Yao; Yeh, Yung-Chin; Liu, Po-Hui; Chang, Chin‐Chen; Liu, Chiao-Kai; Cheng, Ting-Jen Rachel; Chuu, Chih-Sung

doi:10.1103/physreva.96.023811

Cited by 32 publications

(19 citation statements)

References 35 publications

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“…Each of these specifications, however, is very difficult to realize that there have been only a few reports 19 about VES to date: It is still challenging to obtain all of high photon-count rate, narrow linewidth, and high entanglement fidelity in the telecom regime. In previous studies, cavity-enhanced spontaneous parametric down conversion (SPDC) photon sources were demonstrated for many applications 20 ; for example, demonstrating theoretical/ proof-of-principle models [21][22][23][24][25][26] , highly bright single modes [27][28][29][30][31] , and narrow linewidths [32][33][34][35] . On the other hand, for compatibility between telecom and QM absorption line, wavelength conversion (WC) is demonstrated using a laser 36,37 and single photons 38,39 for application to nitrogen-vacancy centers, rare-earth-doped crystals, quantum dots, and rubidium gas, among others.…”

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confidence: 99%

Two-photon comb with wavelength conversion and 20-km distribution for quantum communication

et al. 2020

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Quantum computing and quantum communication, have been greatly developed in recent years and expected to contribute to quantum internet technologies, including cloud quantum computing and unconditionally secure communication. However, long-distance quantum communication is challenging mainly because of optical fiber losses; quantum repeaters are indispensable for fiber-based transmission because unknown quantum states cannot be amplified with certainty. In this study, we demonstrate a versatile entanglement source in the telecom band for fiber-based quantum internet, which has a narrow linewidth of sub-MHz range, entanglement fidelity of more than 95%, and Bell-state generation even with frequency multimode. Furthermore, after a total distribution length of 20-km in fiber, twophoton correlation is observed with an easily identifiable normalized correlation coefficient, despite the limited bandwidth of the wavelength converter. The presented implementation promises an efficient method for entanglement distribution that is compatible with quantum memory and frequency-multiplexed long-distance quantum communication applications.

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confidence: 99%

Two-photon comb with wavelength conversion and 20-km distribution for quantum communication

et al. 2020

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“…Since the rotating terms and the anisotropy have different physics determined by independent parameters, the anisotropic QRM provides an ideal platform for many valuable theoretical issues, such as the role of the counter‐rotating terms, [ 55–57 ] the Fisher information, [ 54 ] the universality scaling of QPT, [ 15,17,53 ] the enhanced squeezing, [ 58 ] and the entanglement measures. [ 59 ] In particular, through the anisotropic QRM, the gap between the JCM and the QRM can be bridged by the dynamics [ 30 ] and the critical exponents in the low‐frequency limit.…”

Section: Paradigmatic Modelsmentioning

confidence: 99%

Fundamental Models in the Light–Matter Interaction: Quantum Phase Transitions and the Polaron Picture

Liu

Ying

et al. 2021

Adv Quantum Tech

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The light–matter interaction not only is ubiquitous in nature but also can be simulated in various artificial systems. Besides the tunability of artificial quantum systems, the experimental access to the ultra‐strong and even deep‐strong couplings has brought a regime with novel phenomenology. Theoretically the finding of the integrability for the quantum Rabi model (QRM) has attracted tremendous attention to the study of the QRM and its extensions which are fundamental models of the light–matter interaction. With the continuing enhancements of coupling strengths, a most fascinating phenomenon of these light–matter models is that they can exhibit few‐body quantum phase transitions (QPTs), while a full understanding of these QPTs is a challenge. The polaron picture is a method capable of analyzing these fundamental models in the entire coupling regime and extracting the essential physics behind the QPTs. A review of its extensive applications on the fundamental light–matter models is presented, with discussions on the phase diagrams and QPT‐related features. The universality of critical exponent of the anisotropic QRM as well as the possibility of QPTs in A2 terms are also addressed.

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“…[ 104–111 ] In particular, it is shown that the HEOM, realized generally via path integral formalism, [ 112–114 ] can be established in the frameworks of the NMQSD. [ 115,116 ]…”

Section: Effects Of Dissipationmentioning

confidence: 99%

Optimal Control for Robust Photon State Transfer in Optomechanical Systems

Wang

Feng

et al. 2021

Annalen der Physik

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Cavity optomechanical systems converting quantum state between photons facilitate the development of scalable quantum information processors. The control of state transfer in such systems require producing fast and robust transfer to the target state with high fidelity. Shortcuts to adiabaticity (STA) has recently been proved a powerful method for performing fast quantum state conversion in optomechanical systems, which is, however, not robust enough against deviations in control parameters. Here a scheme to realize robust photon state transfer in a universal cavity optomechanical system by combining STA with optimal control technique (OCT) is proposed. Minimizing systematic error sensitivities with adjustable optimization parameters allows to control simultaneously the transfer speed, fidelity, and robustness against errors. Numerical results show that the optimized scheme is insensitive to deviations in optomechanical coupling and frequency detuning over a broad range. The effects of dissipation on the transfer fidelity are also examined for practical implementation of the scheme in realistic scenarios.

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Bright single photons for light-matter interaction

Cited by 32 publications

References 35 publications

Two-photon comb with wavelength conversion and 20-km distribution for quantum communication

Two-photon comb with wavelength conversion and 20-km distribution for quantum communication

Fundamental Models in the Light–Matter Interaction: Quantum Phase Transitions and the Polaron Picture

Optimal Control for Robust Photon State Transfer in Optomechanical Systems

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