Quantum 1/f^η noise induced relaxation in the spin-boson model

  • We extend the spin-boson model of open quantum systems to the regime of quantum 1/𝑓^𝜂 noise characterized by negative exponents of its spectral distribution. Using the numerically exact time-evolving matrix product operator, we find the dynamic regime diagram, including pseudocoherent dynamics controlled by quantum 1/𝑓^𝜂 noise. We determine the dephasing rate and find for it an empirical formula valid at zero temperature. The bath reorganization energy depends on the infrared bath cutoff frequency, revealing an increased sensitivity of the dephasing on the measurement time of an experiment. Our results apply to a qubit as an elementary building block of a quantum computer and pave the way toward a quantum treatment of low-frequency noise in more complex architectures.

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Metadaten
Author:Florian OtterpohlORCiD, Peter NalbachORCiD, Elisabetta PaladinoORCiD, Giuseppe A. FalciORCiD, Michael ThorwartORCiD
URN:urn:nbn:de:hbz:1010-opus4-49035
DOI:https://doi.org/10.1103/t87m-7pwn
ISSN:2643-1564
Parent Title (English):Physical Review Research
Publisher:American Physical Society
Document Type:Article
Language:English
Date of Publication (online):2025/10/25
Year of first Publication:2025
Publishing Institution:Westfälische Hochschule Gelsenkirchen Bocholt Recklinghausen
Release Date:2026/01/05
Tag:Dynamical phase transitions; Non-Markovian processes; Open quantum systems & decoherence; Quantum noise; Qubits; Spin-boson model; Tensor network methods
Volume:2025
Issue:7
Article Number:L042030
Page Number:6
Institutes:Fachbereiche / Wirtschaft und Informationstechnik Bocholt
Licence (German):Creative Commons - Namensnennung
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