Dispersion cancellation in a quantum interferometer with independent single photons

Im, Dong-Gil; Kim, Yosep

doi:10.1364/oe.415610

Cited by 11 publications

(5 citation statements)

References 44 publications

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“…Indeed, it is well known that the pattern of the HOM type fourth-order interference depends on the indistinguishability of two interfering fields [8,9]. The broadening of HOM dip in the pattern of (Δ) and the decrease of the visibility due to unbalanced dispersion have already been analyzed and observed when the two Gaussian shaped fields are in thermal state [16], coherent state [17] and single photon state [10,18], respectively. Moreover, it has been shown that the second-order dispersion coefficient of transmission fiber can be measured by characterizing the broadening effect of the fourth-order interference pattern [17].…”

Section: Discussionmentioning

confidence: 99%

Propagation of temporal mode multiplexed optical fields in fibers: influence of dispersion

Zhao,

Huo,

Cui

et al. 2021

Preprint

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Exploiting two interfering fields which are initially in the same temporal mode but with the spectra altered by propagating through different fibers, we characterize how the spectra of temporal modes changes with the fiber induced dispersion by measuring the fourthorder interference when the order number and bandwidth of temporal modes are varied. The experiment is done by launching a pulsed field in different temporal modes into an unbalanced Mach-Zehnder interferometer, in which the fiber lengths in two arms are different. The results show that the mode mismatch of two interfering fields, reflected by the visibility and pattern of interference, is not only dependent upon the amount of unbalanced dispersion but also related to the order number of temporal mode. In particular, the two interfering fields may become orthogonal under a modest amount of unbalanced dispersion when the mode number of the fields is ≥ 2. Moreover, we discuss how to recover the spectrally distorted temporal mode by measuring and compensating the transmission induced dispersion. Our investigation paves the way for further investigating the distribution of temporally multiplexed quantum states in fiber network.

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Section: Discussionmentioning

confidence: 99%

Propagation of temporal mode multiplexed optical fields in fibers: influence of dispersion

Zhao,

Huo,

Cui

et al. 2021

Preprint

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show abstract

“…If two photons go through the same fiber length, they will experience the same dispersion. The symmetric transmission configuration setup in our experiment thus makes the two-photon interference immune to fiber dispersion 38 , 39 …”

Section: Fiber Transmission Of Single Photonsmentioning

confidence: 99%

“…The symmetric transmission configuration setup in our experiment thus makes the two-photon interference immune to fiber dispersion. 38,39 5 Remote Two-Photon Interference After faithful transmission over the optical fibers, the two single photons in the outputs are synchronized and superposed on a beam splitter for quantum interference. We use superconducting nanowire single-photon detectors with an efficiency of 76% and a time resolution of ∼70 ps to register the finally arrived photons.…”

Section: Fiber Transmission Of Single Photonsmentioning

confidence: 99%

Quantum interference with independent single-photon sources over 300 km fiber

et al. 2022

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.In the quest to realize a scalable quantum network, semiconductor quantum dots (QDs) offer distinct advantages, including high single-photon efficiency and indistinguishability, high repetition rate (tens of gigahertz with Purcell enhancement), interconnectivity with spin qubits, and a scalable on-chip platform. However, in the past two decades, the visibility of quantum interference between independent QDs rarely went beyond the classical limit of 50%, and the distances were limited from a few meters to kilometers. Here, we report quantum interference between two single photons from independent QDs separated by a 302 km optical fiber. The single photons are generated from resonantly driven single QDs deterministically coupled to microcavities. Quantum frequency conversions are used to eliminate the QD inhomogeneity and shift the emission wavelength to the telecommunication band. The observed interference visibility is 0.67 ± 0.02 (0.93 ± 0.04) without (with) temporal filtering. Feasible improvements can further extend the distance to ∼600 km. Our work represents a key step to long-distance solid-state quantum networks.

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“…Therefore, the symmetric transmission configuration set-up in our experiment makes the two-photon interference immune to fiber dispersion 47,48 .…”

Section: Fiber Transmission Of Single Photonsmentioning

confidence: 99%

Quantum interference between independent solid-state single-photon sources separated by 300 km fiber

You

Zheng

Chen

et al. 2021

Preprint

View full text Add to dashboard Cite

In the quest to realize a scalable quantum network, semiconductor quantum dots (QDs) offer distinct advantages including high single-photon efficiency and indistinguishability, high repetition rate (tens of GHz with Purcell enhancement), interconnectivity with spin qubits, and a scalable on-chip platform. However, in the past two decades, the visibility of quantum interference between independent QDs rarely went beyond the classical limit of 50% and the distances were limited from a few meters to kilometers. Here, we report quantum interference between two single photons from independent QDs separated by 302 km optical fiber. The single photons are generated from resonantly driven single QDs deterministically coupled to microcavities. Quantum frequency conversions are used to eliminate the QD inhomogeneity and shift the emission wavelength to the telecommunication band. The observed interference visibility is 0.67\pm0.02 (0.93\pm0.04) without (with) temporal filtering. Feasible improvements can further extend the distance to ~600 km. Our work represents a key step to long-distance solid-state quantum networks.

show abstract

Dispersion cancellation in a quantum interferometer with independent single photons

Cited by 11 publications

References 44 publications

Propagation of temporal mode multiplexed optical fields in fibers: influence of dispersion

Propagation of temporal mode multiplexed optical fields in fibers: influence of dispersion

Quantum interference with independent single-photon sources over 300 km fiber

Quantum interference between independent solid-state single-photon sources separated by 300 km fiber

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