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Floodlight quantum key distribution (FL-QKD) uses binary phase-shift keying (BPSK) of multiple optical modes to achieve Gbps secret-key rates (SKRs) at metropolitan-area distances. We show that FL-QKD's SKR can be doubled by using 32-ary PSK.
We propose a structured receiver for optimum mixed-state discrimination in quantum illumination target detection, paving the way for entanglement-enhanced minimum-error-probability sensing in an entanglement-breaking environment.
We generate biphotons via pulsed spontaneous parametric downconversion under extended Gaussian phase matching, and measure their joint spectral intensity at high resolution using a low-loss dispersion compensation module to obtain a 99% heralded-state spectral purity.
We report the first demonstration of floodlight quantum key distribution, which thrives on sending many photons per bit to overcome propagation loss. We achieve 52Mb/s secret-key rate over a channel with 10 dB loss.
We describe a quantum key distribution protocol that breaks the one-photon-per-bit barrier, is secure against the optimum collective Gaussian attack, and is capable of a 2Gbps secret-key rate over a 50 km fiber link.
We develop and implement a large-alphabet, dispersive-optics, prepare-and-measure quantum-key-distribution protocol. We demonstrate 35 Mbps secret-key rates in the laboratory and 300 kbps over a 43-km deployed fiber.
We propose a high-dimensional quantum key distribution protocol secure against photon-number splitting attack by employing only one or two decoy states. Decoy states dramatically increase the protocol's secure distance.
We demonstrate two high-dimensional QKD protocols — secure against collective Gaussian attacks — yielding up to 8.6 secure bits per photon and 6.7 Mb/s throughput, with 6.9 bits per photon after transmission through 20 km of fiber.
We implement a high-dimensional quantum key distribution protocol secure against collective attacks. We transform between conjugate measurement bases using group velocity dispersion. We obtain > 3 secure bits per photon coincidence.
We report the first experimental demonstration of an entanglement-based secure communication system that is resilient to entanglement-breaking loss and noise on the communication channel.
We implement an experimental continuous variable quantum key distribution system over 24 km of optical fiber that uses discrete signaling and a continuous wave local oscillator. A secure key rate of 3.45 kb/s was achieved.
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