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Updated: Jun 30, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Photonic Which-Path Entangler Based on Longitudinal Cavity-Qubit Coupling
1Department of Physics, McGill University, 3600 rue University, Montreal, Québec H3A 2T8, Canada.
Abstract:
We show that a modulated longitudinal cavity-qubit coupling can be used to control the path taken by a multiphoton coherent-state wave packet conditioned on the state of a qubit, resulting in a qubit-which-path (QWP) entangled state. QWP states can generate long-range multipartite entanglement using strategies for interfacing discrete- and continuous-variable degrees of freedom. Using the approach presented here, entanglement can be distributed in a quantum network without the need for single-photon sources or detectors.
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