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.
| 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 |



