Long-distance entanglement sharing using hybrid states of discrete and continuous variables
arXiv:2305.18906 · doi:10.1103/PhysRevApplied.21.064013
Abstract
We introduce a feasible scheme to produce high-rate long-distance entanglement which uses hybrid entanglement (HE) between continuous variables (CV) and discrete variables (DV). We show that HE can effectively remove the experimental limitations of existing CV and DV systems to produce long range entanglement. We benchmark the resulting DV entangled states using an entanglement-based quantum key distribution (EB-QKD) protocol. We show that, using HE states, EB-QKD is possible with standard telecommunication fibers for 300 km. The key idea is using the CV part, which can be adjusted to be robust against photon losses, for increasing the transmission distance, while using the DV part for achieving high secure key rates. Our results point out that HE states provide a clear advantage for practical long-distance and high-rate entanglement generation that may lead to further applications in quantum information processing.
9+17 pages, 6+1 figures. References corrected and newly added
References in corpus (21)
- Measurement device independent quantum key distribution over 404 km optical fibre
- Quantum teleportation using active feed-forward between two Canary Islands
- Experimental device-independent quantum key distribution between distant users
- Proposal for Implementing Device-Independent Quantum Key Distribution based on a Heralded Qubit Amplification
- Photonic verification of device-independent quantum key distribution against collective attacks
- Quantification of Macroscopic Quantum Superpositions within Phase Space
- Continuous-variable quantum cryptography with an untrusted relay: Detailed security analysis of the symmetric configuration
- Network Quantum Steering
- Twin-field quantum key distribution without phase locking
- Quantum teleportation between "particle-like" and "field-like" qubits using hybrid entanglement under decoherence effects
- Generation of hybrid entanglement between a single-photon polarization qubit and a coherent state
- A quantum-bit encoding converter
- Loophole-free Bell test based on local precertification of photon's presence
- Loss-resilient photonic entanglement swapping using optical hybrid states
- Highly photon loss tolerant quantum computing using hybrid qubits
- Non-Gaussian operations in measurement device independent quantum key distribution
- Hybrid entanglement between optical discrete polarizations and continuous quadrature variables
- Teleportation of Hybrid Entangled States with Continuous-Variable Entanglement
- Quantum teleportation of hybrid qubits and single-photon qubits using Gaussian resources
- Heralded preparation of polarization entanglement via quantum scissors
- Amplification of cascaded downconversion by reusing photons with a switchable cavity