An Integrated Bell-State Analyzer on a Thin Film Lithium Niobate Platform

Abstract

Trapped ions are excellent candidates for quantum computing and quantum networks because of their long coherence times, ability to generate entangled photons as well as high fidelity single- and two-qubit gates. To scale up trapped ion quantum computing, we need a Bell-state analyzer on a reconfigurable platform that can herald high fidelity entanglement between ions. In this work, we design a photonic Bell-state analyzer on a reconfigurable thin film lithium niobate platform for polarization-encoded qubits. We optimize the device to achieve high fidelity entanglement between two trapped ions and find >99% fidelity. The proposed device can scale up trapped ion quantum computing as well as other optically active spin qubits, such as color centers in diamond, quantum dots, and rare-earth ions.

References in corpus (11)

• Photonic quantum technologies
• Integrated Photonic Quantum Technologies
• Optical Quantum Computing
• Monolithic Ultrahigh-Q Lithium Niobate Microring Resonator
• High-fidelity preparation, gates, memory and readout of a trapped-ion quantum bit
• Single ion-qubit exceeding one hour coherence time
• Ultra-low loss integrated visible photonics using thin-film lithium niobate
• An Integrated Photonic Platform for Rare-Earth Ions in Thin Film Lithium Niobate
• Spectroscopy of a synthetic trapped ion qubit
• Efficient polarisation-preserving frequency conversion from a trapped-ion-compatible wavelength to the telecom C band
• C-band single photons from a trapped ion via two-stage frequency conversion