Full Frequency Back-Action Spectrum of a Single-Electron Transistor during Qubit Readout

2001/06/29 by Göran Johansson, Goran Johansson, Andreas Käck +3 · 4 citations
Computer Science · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum Information and Cryptography #Quantum and electron transport phenomena #cond-mat

paper · pdf · doi:10.1103/physrevlett.88.046802

4 pages, 5 figures, submitted to PRL

arxiv created 2001/06/29 · openalex publication_date 2002/01/10 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We calculate the spectral density of voltage fluctuations in a single-electron transistor (SET), biased to operate in a transport mode where tunneling events are correlated due to Coulomb interaction. The whole spectrum from low frequency shot noise to quantum noise at frequencies comparable to the SET charging energy (EC/h) is considered. We discuss the back-action during readout of a charge qubit and conclude that single-shot readout is possible using the radio-frequency SET.

Citations

• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Quantum Coherence with a Single Cooper Pair
• Quantum-state engineering with Josephson-junction devices

Cited by

• ac conductance and nonsymmetrized noise at finite frequency in quantum wires and carbon nanotubes
• Single-shot measurement of the Josephson charge qubit
• Noise of a single-electron transistor in the regime of large quantum fluctuations of island charge out of equilibrium
• Quantum-fluctuation effects on the thermopower of a single-electron transistor