Heisenberg-limited qubit readout with two-mode squeezed light

Abstract

We show how to use two-mode squeezed light to exponentially enhance cavity-based dispersive qubit measurement. Our scheme enables true Heisenberg-limited scaling of the measurement, and crucially, is not restricted to small dispersive couplings or unrealistically long measurement times. It involves coupling a qubit dispersively to two cavities, and making use of a symmetry in the dynamics of joint cavity quadratures (a so-called quantum-mechanics-free subsystem). We discuss the basic scaling of the scheme and its robustness against imperfections, as well as a realistic implementation in circuit quantum electrodynamics.

5 pages, 4 figures, Supplemental Material

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Cited by in corpus (41)

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• Magnetic resonance with squeezed microwaves
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• Optimal operation of a Josephson parametric amplifier for vacuum squeezing
• Stroboscopic qubit measurement with squeezed illumination
• Superposition of two-mode squeezed states for quantum information processing and quantum sensing
• High-fidelity resonator-induced phase gate with single-mode squeezing
• Ultrastrong coupling dynamics with a transmon qubit
• Measuring a transmon qubit in circuit QED: dressed squeezed states
• Ideal Quantum Nondemolition Readout of a Flux Qubit Without Purcell Limitations
• Stabilizing two-qubit entanglement by mimicking a squeezed environment
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• Single-Spin Readout and Quantum Sensing using Optomechanically Induced Transparency
• Loss asymmetries in quantum travelling wave parametric amplifiers
• A 4-8 GHz Kinetic Inductance Travelling-Wave Parametric Amplifier Using Four-Wave Mixing with Near Quantum-Limit Noise Performance
• Enhanced qubit readout using locally-generated squeezing and inbuilt Purcell-decay suppression
• Exponentially Improved Dispersive Qubit Readout with Squeezed Light
• Nuclear spin readout in a cavity-coupled hybrid quantum dot-donor system
• Parametric amplification and squeezing with an ac- and dc-voltage biased superconducting junction
• Creation of a squeezed photon distribution using artificial atoms with broken inversion symmetry
• Qubit state tomography in superconducting circuit via weak measurements
• Proposal for a continuous wave laser with linewidth well below the standard quantum limit
• Creating photon-number squeezed strong microwave fields by a Cooper-pair injection laser
• Single-photon limit of dispersive readout of a qubit with a photodetector
• Concurrent spin squeezing and light squeezing in an atomic ensemble
• Entanglement-assisted quantum feedback control
• Flux-pulse-assisted Readout of a Fluxonium Qubit
• Non-Gaussian generalized two-mode squeezing: applications to two-ensemble spin squeezing and beyond
• Hybrid phase-space--Fock-space approach to evolution of a driven nonlinear resonator
• Two-time correlators for propagating squeezed microwave in transients
• Gradual partial-collapse theory for ideal nondemolition measurements of qubits in circuit QED
• Dispersive Qubit Readout of Temperature
• Comment on `The minimum-uncertainty squeezed states for atoms and photons in cavity'
• Beating the 3 dB Limit for Intracavity Squeezing and Its Application to Nondemolition Qubit Readout
• Loss-robust crossband entanglement generation beyond the direct-transduction limit