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Corralling cats in a quantum network

July 4 @ 3:30 pm - 4:30 pm

Abstract: A crucial requirement for large-scale quantum information processing will be the development of modular quantum processors capable of transmitting quantum information between qubits housed at different nodes. In this talk, I will describe a strategy for generating “which-path” entanglement between a qubit and a light pulse .The resulting qubit—which-path entangled state can be used for distributing entanglement between nodes in a quantum network, or for achieving optimal quantum-enhanced phase estimation in an interferometer using phase sensitive (rather than photon-number-resolving) measurements . Finally, I will also describe strategies for performing long-range “flying-cat” parity checks of distant stationary qubits using conditional phase shifts on propagating light pulses . This could allow for the implementation of distributed fault-tolerant quantum computing, or for the measurement based preparation of entangled resource states for quantum communication protocols. Z. M. McIntyre and W. A. Coish, Phys. Rev. Lett. 132, 093603 (2024) Z. M. McIntyre and W. A. Coish, arXiv:2405.13265 Z. M. McIntyre and W. A. Coish, Phys. Rev. Research 6, 023247 (2024) Co-sponsored by: Prof. Nicolas Quesada Speaker(s): Zoé McIntyre J. Armand Bombardier J-2074, Polytechnique Montréal, Montréal, Quebec, Canada, J3X 1P7