Journal
PHYSICAL REVIEW A
Volume 103, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.103.052610
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Funding
- National Science Foundation [1608049, 1838996]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1608049, 1838996] Funding Source: National Science Foundation
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Photons are attractive for flying quantum bits due to their low noise, long coherence times, and ease of manipulation. However, the challenge lies in realizing two-qubit gates for photonic qubits. So far, only probabilistic optical controlled-phase gates have been demonstrated.
Photons are appealing as flying quantum bits due to their low-noise, long coherence times, light-speed transmission, and ease of manipulation at the single-qubit level using standard optical components such as beam splitters and waveguides. The challenge in optical quantum information processing has been the realization of two-qubit gates for photonic qubits due to the lack of highly efficient optical Kerr nonlinearities at the single-photon level. To date, only probabilistic two-qubit photonic controlled-phase gates based on linear optics and projective measurement using photon detectors have been demonstrated. Here we show that a high-fidelity frequency-encoded deterministic two-photon controlled-phase gate can be achieved by exploiting the strong photon-photon correlation enabled by photonic dimers, and the unique nonreciprocal photonic propagation in chiral quantum nanophotonic systems.
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