Radio-frequency reflectometry of a quantum dot using an ultra-low-noise SQUID amplifier
arXiv:1810.05767 · doi:10.1063/5.0005886
Abstract
Fault-tolerant spin-based quantum computers will require fast and accurate qubit readout. This can be achieved using radio-frequency reflectometry given sufficient sensitivity to the change in quantum capacitance associated with the qubit states. Here, we demonstrate a 23-fold improvement in capacitance sensitivity by supplementing a cryogenic semiconductor amplifier with a SQUID preamplifier. The SQUID amplifier operates at a frequency near 200 MHz and achieves a noise temperature below 600 mK when integrated into a reflectometry circuit, which is within a factor 120 of the quantum limit. It enables a record sensitivity to capacitance of 0.07 aF/\sqrt{Hz}. The setup is used to acquire charge stability diagrams of a gate-defined double quantum dot in a short time with a signal-to-noise ration of about 38 in 1 microsecond of integration time.
References in corpus (39)
- Surface codes: Towards practical large-scale quantum computation
- Spins in few-electron quantum dots
- The Physical Implementation of Quantum Computation
- Introduction to Quantum Noise, Measurement and Amplification
- Electron transport through double quantum dots
- Quantum Error Correction for Quantum Memories
- A Two Qubit Logic Gate in Silicon
- Interfacing spin qubits in quantum dots and donors - hot, dense and coherent
- Triplet-Singlet Spin Relaxation via Nuclei in a Double Quantum Dot
- Silicon CMOS architecture for a spin-based quantum computer
- A widely tunable parametric amplifier based on a SQUID array resonator
- Rapid Single-Shot Measurement of a Singlet-Triplet Qubit
- Soundness and completeness of quantum root-mean-square errors
- Coherent control of three-spin states in a triple quantum dot
- Dispersive Readout of a Few-Electron Double Quantum Dot with Fast rf Gate-Sensors
- A high-sensitivity gate-based charge sensor in silicon
- Rapid high-fidelity gate-based spin read-out in silicon
- Gate-based single-shot readout of spins in silicon
- Charge and spin state readout of a double quantum dot coupled to a resonator
- Gate-reflectometry dispersive readout and coherent control of a spin qubit in silicon
- Fast charge sensing of a cavity-coupled double quantum dot using a Josephson parametric amplifier
- Hole Spin Coherence in a Ge/Si Heterostructure Nanowire
- Dispersively detected Pauli Spin-Blockade in a Silicon Nanowire Field-Effect Transistor
- Fast gate-based readout of silicon quantum dots using Josephson parametric amplification
- A coherent nanomechanical oscillator driven by single-electron tunnelling
- Measuring the complex admittance of a carbon nanotube double quantum dot
- Rapid high-fidelity spin state readout in Si/SiGe quantum dots via radio-frequency reflectometry
- Radio-frequency capacitive gate-based sensing
- Effect of Exchange Interaction on Spin Dephasing in a Double Quantum Dot
- An ultra sensitive radio frequency single electron transistor working up to 4.2 K
- Sensitive radio-frequency measurements of a quantum dot by tuning to perfect impedance matching
- Radio frequency charge sensing in InAs nanowire double quantum dots
- Rapid detection of coherent tunneling in an InAs nanowire quantum dot through dispersive gate sensing
- Fast charge sensing of Si/SiGe quantum dots via a high-frequency accumulation gate
- A non-invasive electron thermometer based on charge sensing of a quantum dot
- Radio frequency reflectometry and charge sensing of a precision placed donor in silicon
- Spectroscopy of Quantum-Dot Orbitals with In-Plane Magnetic Fields
- Level spectrum and charge relaxation in a silicon double quantum dot probed by dual-gate reflectometry
- Photon-assisted tunneling and charge dephasing in a carbon nanotube double quantum dot
Cited by in corpus (11)
- Review of performance metrics of spin qubits in gated semiconducting nanostructures
- A singlet triplet hole spin qubit in planar Ge
- Probing quantum devices with radio-frequency reflectometry
- Deep Reinforcement Learning for Efficient Measurement of Quantum Devices
- Rapid microwave-only characterization and readout of quantum dots using multiplexed gigahertz-frequency resonators
- Interconnect Fabrics for Multi-Core Quantum Processors: A Context Analysis
- Radio-frequency C-V measurements with sub-attofarad sensitivity
- Cryogenic amplification of image-charge detection for readout of quantum states of electrons on liquid helium
- All rf-based tuning algorithm for quantum devices using machine learning
- Radio-frequency characterization of a supercurrent transistor made from a carbon nanotube
- Photoionization detection of a single Er ion with sub-100-ns time resolution