Measurement-Induced Long-Distance Entanglement of Superconducting Qubits using Optomechanical Transducers

Abstract

Although superconducting systems provide a promising platform for quantum computing, their networking poses a challenge as they cannot be interfaced to light---the medium used to send quantum signals through channels at room temperature. We show that mechanical oscillators can mediated such coupling and light can be used to measure the joint state of two distant qubits. The measurement provides information on the total spin of the two qubits such that entangled qubit states can be postselected. Entanglement generation is possible without ground-state cooling of the mechanical oscillators for systems with optomechanical cooperativity moderately larger than unity; in addition, our setup tolerates a substantial transmission loss. The approach is scalable to generation of multipartite entanglement and represents a crucial step towards quantum networks with superconducting circuits.

Updated figures, close to published version

References in corpus (18)

• The Quantum Internet
• Quantum information processing with circuit quantum electrodynamics
• Detecting arbitrary quantum errors via stabilizer measurements on a sublattice of the surface code
• Quantum feedback control of a superconducting qubit: Persistent Rabi oscillations
• Opto-mechanical transducers for long-distance quantum communication
• Bidirectional conversion between microwave and light via ferromagnetic magnons
• Detecting bit-flip errors in a logical qubit using stabilizer measurements
• Mapping the optimal route between two quantum states
• Feedback control of a solid-state qubit using high-fidelity projective measurement
• Initialization by measurement of a two-qubit superconducting circuit
• Universal Vectorial and Ultrasensitive Nanomechanical Force Field Sensor
• Prediction and retrodiction for a continuously monitored superconducting qubit
• Observation of Strong Radiation Pressure Forces from Squeezed Light on a Mechanical Oscillator
• Coherent, mechanical control of a single electronic spin
• Controllable Coupling between Flux Qubit and Nanomechanical Resonator by Magnetic Field
• Quantum network of superconducting qubits through opto-mechanical interface
• Interfacing microwave qubits and optical photons via spin ensembles
• An opto-magneto-mechanical quantum interface between distant superconducting qubits

Cited by in corpus (15)

• Quantum information processing with superconducting circuits: a review
• Nano-Opto-Electro-Mechanical Systems
• Fully coupled hybrid cavity optomechanics: quantum interferences and correlations
• Figures of merit for quantum transducers
• Interfacing superconducting qubits and single optical photons using molecules in waveguides
• Spatially Adiabatic Frequency Conversion in Optoelectromechanical Arrays
• Electro-optomechanical equivalent circuits for quantum transduction
• Interference effects in hybrid cavity optomechanics
• Coherent feedback in optomechanical systems in the sideband-unresolved regime
• Optomechanical Entanglement of Remote Microwave Cavities
• Entanglement Thresholds of Doubly-Parametric Quantum Transducers
• Long-time Bell states of waveguide-mediated qubits via continuous measurement
• Synchronization of a superconducting qubit to an optical field mediated by a mechanical resonator
• Mechanical qubit-light entanglers in hybrid nonlinear qubit-optomechanics
• Accelerated Gaussian quantum state transfer between two remote mechanical resonators