An in-situ tunable radio-frequency quantum point contact

Abstract

Incorporating a variable capacitance diode into a radio-frequency matching circuit allows us to in-situ tune the resonance frequency of an RF quantum point contact, increasing the versatility of the latter as a fast charge sensor of a proximal quantum circuit. The performance of this method is compared in detail to conventional low-frequency charge detection. The approach is also applicable to other RF-detection schemes, such as RF-SET circuits.

4 pages, 3 figures

References in corpus (8)

• Counting statistics of single-electron transport in a quantum dot
• Rapid Single-Shot Measurement of a Singlet-Triplet Qubit
• Fast Single-Charge Sensing with an rf Quantum Point Contact
• Fast sensing of double-dot charge arrangement and spin state with an rf sensor quantum dot
• Single Shot Charge Detection Using A Radio-Frequency Quantum Point Contact
• A cryogenic amplifier for fast real-time detection of single-electron tunneling
• Self-aligned charge read-out for InAs nanowire quantum dots
• Radio-frequency reflectometry on large gated 2-dimensional systems

Cited by in corpus (17)

• Dipole coupling of a double quantum dot to a microwave resonator
• Probing quantum devices with radio-frequency reflectometry
• Time scales in the dynamics of an interacting quantum dot
• Sensitive radio-frequency measurements of a quantum dot by tuning to perfect impedance matching
• Time-resolved charge detection in graphene quantum dots
• Tunable microwave impedance matching to a high impedance source using a Josephson metamaterial
• Radio frequency charge sensing in InAs nanowire double quantum dots
• Evaluating charge noise acting on semiconductor quantum dots in the circuit quantum electrodynamics architecture
• Fast detection of single-charge tunneling to a graphene quantum dot in a multi-level regime
• Wide-band current preamplifier for conductance measurements with large input capacitance
• Optimization of sample-chip design for stub-matched radio-frequency reflectometry measurements
• Low-temperature tunable radio-frequency resonator for sensitive dispersive readout of nanoelectronic devices
• Cryogenic hyperabrupt strontium titanate varactors for sensitive reflectometry of quantum dots
• Dispersive sensing in hybrid InAs/Al nanowires
• A circuit analysis of an in situ tunable radio-frequency quantum point contact
• Radio-frequency reflectometry on an undoped AlGaAs/GaAs single electron transistor
• 4.2 K Sensitivity-Tunable Radio Frequency Reflectometry of a Physically Defined P-channel Silicon Quantum Dot