Loss-robust crossband entanglement generation beyond the direct-transduction limit
arXiv:2506.19293 · doi:10.1364/OPTICAQ.584586
Abstract
Entanglement across distant frequency bands is a crucial resource in quantum networking. However, directly entangling crossband photons, e.g., microwave and optical, is challenging. Furthermore, distributing crossband entanglement via direct quantum transduction is fundamentally limited, regardless of input engineering with unconstrained source brightness. We propose to utilize intraband entanglement to overcome such direct-transduction limits by a factor that increases with the input intraband entanglement brightness in the ideal case. In the presence of experimental loss 5% and assuming 10dB of squeezing in both optical and microwave bands, we show that our protocol can generate a violation of the separability criterion equivalent to 2.38 ebits, compared with the baseline protocol limited to 0.082 ebits. The proposed protocols rely only on off-the-shelf components and provide advantages robust to a substantial amount of loss.
References in corpus (45)
- Quantum entanglement
- Entanglement of Formation of an Arbitrary State of Two Qubits
- The Quantum Internet
- A computable measure of entanglement
- Advances in Quantum Metrology
- Quantum metrology
- Inseparability criterion for continuous variable systems
- The logarithmic negativity: A full entanglement monotone that is not convex
- A strong loophole-free test of local realism
- Fundamental Limits of Repeaterless Quantum Communications
- General Benchmarks for Quantum Repeaters
- Ground-to-satellite quantum teleportation
- Bidirectional and efficient conversion between microwave and optical light
- Quantum transduction of optical photons from a superconducting qubit
- Experimental Demonstration of Blind Quantum Computing
- Longer-Baseline Telescopes Using Quantum Repeaters
- Coherent coupling between radio frequency, optical, and acoustic waves in piezo-optomechanical circuits
- Efficient bidirectional piezo-optomechanical transduction between microwave and optical frequency
- Reversible optical to microwave quantum interface
- Microwave-to-optics conversion using a mechanical oscillator in its quantum groundstate
- Entanglement Percolation in Quantum Networks
- Strong magnetic coupling of an ultracold gas to a superconducting waveguide cavity
- Microwave-to-optical conversion using lithium niobate thin-film acoustic resonators
- Gaussian measures of entanglement versus negativities: the ordering of two-mode Gaussian states
- A magneto-optic modulator with unit quantum effciency
- Cavity quantum electro-optics
- Quantum memory for entangled two-mode squeezed states
- Evading quantum mechanics
- Cavity piezo-mechanics for superconducting-nanophotonic quantum interface
- Cavity quantum electro-optics. II. Input-output relations between traveling optical and microwave fields
- Optomechanical quantum teleportation
- Heralded Generation and Detection of Entangled Microwave--Optical Photon Pairs
- Entangling microwaves with optical light
- Entanglement-Based Quantum Information Technology
- Electro-optic entanglement source for microwave to telecom quantum state transfer
- Quantum-enabled interface between microwave and telecom light
- Optomechanical ground-state cooling in a continuous and efficient electro-optic transducer
- Heisenberg-limited qubit readout with two-mode squeezed light
- Entanglement-enhanced dual-comb spectroscopy
- Restoring quantum communication efficiency over high loss optical fibres
- Bosonic quantum communication across arbitrarily high loss channels
- Entangling remote microwave quantum computers with hybrid entanglement swap and variational distillation
- Overcoming the fundamental limit of quantum transduction via intraband entanglement
- Passive environment-assisted quantum communication with GKP states
- Einstein-Podolsky-Rosen-like separability indicators for two-mode Gaussian states