Journal
PHYSICAL REVIEW APPLIED
Volume 12, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.12.044067
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Funding
- European Research Council (ERC) through the Superconducting Quantum Networks (SuperQuNet) project
- National Centre of Competence in Research Quantum Science and Technology (NCCR QSIT) a research instrument of the Swiss National Science Foundation (SNSF)
- Baugarten Stiftung
- ETH Zurich Foundation
- ETH Zurich
- Natural Sciences and Engineering Research Council (NSERC)
- Canada First Research Excellence Fund
- Vanier Canada Graduate Scholarships
- Early Postdoc Mobility Fellowship of the Swiss National Science Foundation (SNSF)
- National Science Foundation (NSF) [ECCS-1708734]
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Heralding techniques are useful in quantum communication to circumvent losses without resorting to error-correction schemes or quantum repeaters. Such techniques are realized, for example, by monitoring for photon loss at the receiving end of the quantum channel while not disturbing the transmitted quantum state. We describe and experimentally benchmark a scheme that incorporates error detection in a direct quantum channel connecting two transmon qubits using traveling microwave photons. This is achieved by encoding the quantum information as a time-bin superposition of a single photon, which simultaneously realizes high communication rates and high fidelities. The presented scheme is straightforward to implement in circuit quantum electrodynamics and is fully microwave controlled, making it an interesting candidate for future modular quantum-computing architectures.
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