Radio frequency pulsed-gate charge spectroscopy on coupled quantum dots

Abstract

Time-resolved electron dynamics in coupled quantum dots is directly observed by a pulsed-gate technique. While individual gate voltages are modulated with periodic pulse trains, average charge occupations are measured with a nearby quantum point contact as detector. A key component of our setup is a sample holder optimized for broadband radio frequency applications. Our setup can detect displacements of single electrons on time scales well below a nanosecond. Tunneling rates through individual barriers and relaxation times are obtained by using a rate equation model. We demonstrate the full characterization of a tunable double quantum dot using this technique, which could also be used for coherent charge qubit control.

References in corpus (21)

• Spins in few-electron quantum dots
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Electron transport through double quantum dots
• Single-shot read-out of an individual electron spin in a quantum dot
• Coherent manipulation of electronic states in a double quantum dot
• Driven quantum transport on the nanoscale
• Counting statistics of single-electron transport in a quantum dot
• Triplet-Singlet Spin Relaxation via Nuclei in a Double Quantum Dot
• Charge-qubit operation of an isolated double quantum dot
• Fast Single-Charge Sensing with an rf Quantum Point Contact
• Coherent electronic transfer in quantum dot systems using adiabatic passage
• An electrostatically defined serial triple quantum dot charged with few electrons
• Fast sensing of double-dot charge arrangement and spin state with an rf sensor quantum dot
• Real-time detection of single electron tunneling using a quantum point contact
• Quantum-Limited Measurement and Information in Mesoscopic Detectors
• Single Shot Charge Detection Using A Radio-Frequency Quantum Point Contact
• Pulsed-gate measurements of the singlet-triplet relaxation time in a two-electron double quantum dot
• A cryogenic amplifier for fast real-time detection of single-electron tunneling
• Spatial adiabatic passage in a realistic triple well structure
• Phonon-mediated vs. Coulombic Back-Action in Quantum Dot circuits
• Time-resolved charge detection with cross-correlation techniques

Cited by in corpus (5)

• Lasing and transport in a quantum dot-resonator circuit
• Measurement back-action in stacked graphene quantum dots
• Nonequilibrium Landau-Zener-Stuckelberg spectroscopy in a double quantum dot
• Detuning Axis Pulsed Spectroscopy of Valley-Orbital States in Si/SiGe Quantum Dots
• Noise spectrum of a quantum dot-resonator lasing circuit