Measuring current by counting electrons in a nanowire quantum dot

Abstract

We measure current by counting single electrons tunneling through an InAs nanowire quantum dot. The charge detector is realized by fabricating a quantum point contact in close vicinity to the nanowire. The results based on electron counting compare well to a direct measurements of the quantum dot current, when taking the finite bandwidth of the detector into account. The ability to detect single electrons also opens up possibilities for manipulating and detecting individual spins in nanowire quantum dots.

References in corpus (14)

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• Counting statistics of single-electron transport in a quantum dot
• Manipulation of a single charge in a double quantum dot
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• Real-time detection of single electron tunneling using a quantum point contact
• Frequency-selective single photon detection using a double quantum dot
• Time-Resolved Detection of Individual Electrons in a Quantum Dot
• Counting statistics and super-Poissonian noise in a quantum dot
• Single Shot Charge Detection Using A Radio-Frequency Quantum Point Contact
• Measurements of higher order noise correlations in a quantum dot with a finite bandwidth detector
• Poisson transition rates from time-domain measurements with finite bandwidth
• A cryogenic amplifier for fast real-time detection of single-electron tunneling
• Self-aligned charge read-out for InAs nanowire quantum dots

Cited by in corpus (17)

• Single-electron current sources: towards a refined definition of ampere
• Electron counting in quantum dots
• Time-resolved charge detection in graphene quantum dots
• Statistical electron excitation in a double quantum dot induced by two independent quantum point contacts
• Master equation approach to transient quantum transport incorporating with initial correlations
• Detecting THz current fluctuations in a quantum point contact using a nanowire quantum dot
• Detecting single-electron tunneling involving virtual processes in real time
• Counting statistics of hole transfer in a p-type GaAs quantum dot with dense excitation spectrum
• Time-resolved charge detection with cross-correlation techniques
• Real Time Electron Tunneling and Pulse Spectroscopy in Carbon Nanotube Quantum Dots
• Correlated Counting of Single Electrons in a Nanowire Double Quantum Dot
• Identifying single electron charge sensor events using wavelet edge detection
• Buildup of Fano resonances in the time domain in a double quantum dot Aharonov-Bohm interferometer
• Noise-induced spectral shift measured in a Double Quantum Dot
• A charge parity ammeter
• Phonon influence on the measurement of spin states in double quantum dots using the quantum point contact
• Master equation approach to transient quantum transport in nanostructures