GHz-Pulsed Source of Entangled Photons for Reconfigurable Quantum Networks
arXiv:2201.08799 · doi:10.1088/2058-9565/ac86f0
Abstract
Entanglement is a universal resource in quantum networks, yet entangled photon sources are typically custom-made for a specific use case. Versatility, both in terms of state modulation and tunability of the temporal properties of the photons, is the key to flexible network architectures and cryptographic primitives that go beyond quantum key distribution. Here, we report on a flexible source design that produces high-quality entanglement in continuous-wave and GHz-rate-pulsed operation modes. Utilizing off-the-shelf optical components, our approach uses a fiber-based Sagnac loop to generate polarization-entangled photons at telecom wavelength with high efficiency and fidelities above 0.99. Phase modulation up to GHz before entangled state generation is also possible for fast entangled state switching. We show phase modulation at 100 MHz with an average fidelity of 0.95. Furthermore, the source 60 nm spectral bandwidth is entirely compatible with fully reconfigurable wavelength-multiplexed quantum networks.
arXiv comment10 pages, 5 figures
References in corpus (20)
- On the Measurement of Qubits
- Secure quantum key distribution with realistic devices
- Quantum Computing
- Photonic quantum information processing: a concise review
- Entanglement-based wavelength multiplexed quantum communication network
- A trusted-node-free eight-user metropolitan quantum communication network
- Quantum key distribution with entangled photon sources
- On the genesis and evolution of Integrated Quantum Optics
- Experimental interference of independent photons
- Quantum photonics at telecom wavelengths based on lithium niobate waveguides
- Entangled Photon-Pair Sources based on three-wave mixing in bulk crystals
- High-performance quantum entanglement generation via cascaded second-order nonlinear processes
- Flexible entanglement-distribution network with an AlGaAs chip for secure communications
- Quantum secret sharing with polarization-entangled photon pairs
- All-fiber self-compensating polarization encoder for Quantum Key Distribution
- CW-pumped telecom band polarization entangled photon pair generation in a Sagnac interferometer
- High-fidelity entanglement swapping and generation of three-qubit GHZ state using asynchronous telecom photon pair sources
- Fully guided-wave photon pair source for quantum applications
- Experimental entanglement generation for quantum key distribution beyond 1 Gbit/s
- A polarization maintaining scheme for 1.5 μm polarization entangled photon pair generation in optical fibers