Correcting Low-Frequency Noise with Continuous Measurement

2006/06/19 by Lin Tian, L. Tian
Computer Science · Physics and Astronomy · #Acoustics #Computer science #Fidelity #Flux qubit #Frequency domain #High fidelity #Noise (video) #Phase qubit #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum decoherence #Quantum mechanics #Quantum noise #Qubit #Statistical physics #Telecommunications #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevlett.98.153602

published as Phys. Rev. Lett. 98, 153602 (2007) · 10 pages, 3 figures, submitted

arxiv created 2006/06/19 · openalex publication_date 2007/04/13 · arxiv updated 2011/07/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Low-frequency noise presents a serious source of decoherence in solid-state qubits. When combined with a continuous weak measurement of the eigenstates, low-frequency noise induces a second-order relaxation between the qubit states. Here, we show that the relaxation provides a unique approach to calibrate the low-frequency noise in the time domain. By encoding one qubit with two physical qubits that are alternatively calibrated, quantum-logic gates with high fidelity can be performed.

Citations

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