Parity measurement of remote qubits using dispersive coupling and photodetection

Abstract

Parity measurement is a key step in many entanglement generation and quantum error correction schemes. We propose a protocol for non-destructive parity measurement of two remote qubits, i.e., macroscopically separated qubits with no direct interaction. The qubits are instead dispersively coupled to separate resonators that radiate to shared photodetectors. The scheme is deterministic in the sense that there is no fundamental bound on the success probability. Compared to previous proposals, our protocol addresses the scenario where number resolving photodetectors are available but the qubit-resonator coupling is time-independent and only dispersive.

References in corpus (19)

• Resolving photon number states in a superconducting circuit
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
• Qubit-photon interactions in a cavity: Measurement induced dephasing and number splitting
• Coplanar Waveguide Resonators for Circuit Quantum Electrodynamics
• Quantum trajectory approach to circuit QED: Quantum jumps and the Zeno effect
• Undoing a weak quantum measurement of a solid-state qubit
• Robust creation of entanglement between ions in spatially separate cavities
• Microwave Photon Detector in Circuit QED
• Hybrid quantum repeater based on dispersive CQED interactions between matter qubits and bright coherent light
• Fast electron thermometry towards ultra-sensitive calorimetric detection
• Storage and on-demand release of microwaves using superconducting resonators with tunable coupling
• Proposal for generating and detecting multi-qubit GHZ states in circuit QED
• Breakdown of the cross-Kerr scheme for Photon Counting
• Physical model of continuous two-qubit parity measurement in a cavity-QED network
• Theory of microwave single-photon detection using an impedance-matched $\Lambda$ system
• Repeat-until-success quantum repeaters
• Entangling distant quantum dots using classical interference
• Scalable two- and four-qubit parity measurement with a threshold photon counter

Cited by in corpus (7)

• Microwave photonics with superconducting quantum circuits
• Bolometer operating at the threshold for circuit quantum electrodynamics
• Detection of zeptojoule microwave pulses using electrothermal feedback in proximity-induced Josephson junctions
• Quantum trajectories and their statistics for remotely entangled quantum bits
• Relationship between costs for quantum error mitigation and non-Markovian measures
• Three-qubit direct dispersive parity measurement with Tunable Coupling Qubits
• Towards a heralded eigenstate preserving measurement of multi-qubit parity in circuit QED