Measurement of a Superconducting Qubit with a Microwave Photon Counter
arXiv:1803.01014 · doi:10.1126/science.aat4625
Abstract
Fast, high-fidelity measurement is a key ingredient for quantum error correction. Conventional approaches to the measurement of superconducting qubits, involving linear amplification of a microwave probe tone followed by heterodyne detection at room temperature, do not scale well to large system sizes. Here we introduce an alternative approach to measurement based on a microwave photon counter. We demonstrate raw single-shot measurement fidelity of 92%. Moreover, we exploit the intrinsic damping of the counter to extract the energy released by the measurement process, allowing repeated high-fidelity quantum non-demolition measurements. Crucially, our scheme provides access to the classical outcome of projective quantum measurement at the millikelvin stage. In a future system, counter-based measurement could form the basis for a scalable quantum-to-classical interface.
arXiv comment11 pages, 11 figures
References in corpus (30)
- Charge insensitive qubit design derived from the Cooper pair box
- Surface codes: Towards practical large-scale quantum computation
- Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
- State preservation by repetitive error detection in a superconducting quantum circuit
- Resolving photon number states in a superconducting circuit
- Decoherence in Josephson Qubits from Dielectric Loss
- Coherent Josephson qubit suitable for scalable quantum integrated circuits
- The Flux Qubit Revisited to Enhance Coherence and Reproducibility
- AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
- Fast Scalable State Measurement with Superconducting Qubits
- An RF-Driven Josephson Bifurcation Amplifier for Quantum Measurements
- Coplanar Waveguide Resonators for Circuit Quantum Electrodynamics
- Realizing Rapid, High-Fidelity, Single-Shot Dispersive Readout of Superconducting Qubits
- Deterministic entanglement of superconducting qubits by parity measurement and feedback
- Single-shot qubit readout in circuit Quantum Electrodynamics
- Single-shot qubit readout in circuit Quantum Electrodynamics
- Microwave Photon Counter Based on Josephson Junctions
- Observation of quantum oscillations between a Josephson phase qubit and a microscopic resonator using fast readout
- State tomography of capacitively shunted phase qubits with high fidelity
- Measurement-induced state transitions in a superconducting qubit: Beyond the rotating wave approximation
- Heralded state preparation in a superconducting qubit
- Initialization by measurement of a two-qubit superconducting circuit
- Tunable Superconducting Qubits with Flux-Independent Coherence
- Quantum--Classical Interface Based on Single Flux Quantum Digital Logic
- Photon Shot Noise Dephasing in the Strong-Dispersive Limit of Circuit QED
- Catching Shaped Microwave Photons with 99.4% Absorption Efficiency
- Nondestructive readout for a superconducting flux qubit
- Rapid Driven Reset of a Qubit Readout Resonator
- Fluxon readout of a superconducting qubit
- High-fidelity qubit measurement with a microwave photon counter
Cited by in corpus (46)
- Circuit Quantum Electrodynamics
- Microwaves in Quantum Computing
- Noisy intermediate-scale quantum computers
- Bolometer operating at the threshold for circuit quantum electrodynamics
- Detecting itinerant microwave photons with engineered non-linear dissipation
- Single Flux Quantum-Based Digital Control of Superconducting Qubits in a Multi-Chip Module
- Optimized heat transfer at exceptional points in quantum circuits
- Nanobolometer with Ultralow Noise Equivalent Power
- Efficient and Continuous Microwave Photodetection in Hybrid Cavity-Semiconductor Nanowire Double Quantum Dot Diodes
- High-Fidelity Measurement of a Superconducting Qubit using an On-Chip Microwave Photon Counter
- Engineering dissipation with resistive elements in circuit quantum electrodynamics
- Primary thermometry of propagating microwaves in the quantum regime
- Efficient and Low-Backaction Quantum Measurement Using a Chip-Scale Detector
- Full counting statistics of the photocurrent through a double quantum dot embedded in a driven microwave resonator
- Single-shot number-resolved detection of microwave photons with error mitigation
- Direct experimental certification of quantum non-Gaussian character and Wigner function negativity of single-photon detectors
- A tunable quantum dissipator for active resonator reset in circuit QED
- Stepping closer to pulsed single microwave photon detectors for axions search
- Discriminating the Phase of a Coherent Tone with a Flux-Switchable Superconducting Circuit
- Speeding up qubit control with bipolar single-flux-quantum pulse sequences
- Measurement-induced phase transitions in monitored infinite-range interacting systems
- Electromagnetic radiation detectors based on Josephson junctions: Effective Hamiltonian
- Counting statistics of microwave photons in circuit QED
- Generalized figure of merit for qubit readout
- Electron shelving of a superconducting artificial atom
- Single-photon limit of dispersive readout of a qubit with a photodetector
- Quantum limits on noise for a class of nonlinear amplifiers
- Continuous microwave photon counting by semiconductor-superconductor hybrids
- Complete physical characterization of QND measurements via tomography
- A superconducting detector that counts microwave photons up to two
- Integrated multiplexed microwave readout of silicon quantum dots in a cryogenic CMOS chip
- Photon-number resolution with microwave Josephson photomultipliers
- Metastable states and hidden phase slips in nanobridge SQUIDs
- Correlation measurement of propagating microwave photons at millikelvin
- Flux qubit-based detector of microwave photons
- Quantum enhanced metrology in the search for fundamental physical phenomena
- Kerr non-linearity enhances the response of a graphene Josephson bolometer
- High-Efficiency Tunable Microwave Photon Detector Based on a Semiconductor Double Quantum Dot Coupled to a Superconducting High-Impedance Cavity
- Qubit Energy Tuner Based on Single Flux Quantum Circuits
- Wigner-function formalism for the detection of single microwave pulses in a resonator-coupled double quantum dot
- Detector of microwave photon pairs based on a Josephson photomultiplier
- Microwave response in a topological superconducting quantum interference device
- Two-photon coupling via Josephson element I: Breaking the symmetry with magnetic fields
- Enhancing the sensitivity of single microwave photon detection with bandwidth tunability
- Fast and Continuous Detection of Single Microwave Photons via Photo-assisted Quasiparticle Tunneling to a Superconducting Island
- Dispersive detection of single microwave photons with quantum dots