Quantum speed limit time of a spin qubit in noninteracting spin bath
Abstract
We study the dynamic of quantum speed limit (QSL) time of a qubit coupled to a bath of noninteracting spins. The investigations are carried under both exact and approximate solutions of the model and the results of the two approaches are compared with each other. Under the exact solution and in the low temperature limit, QSL time becomes independent of the number of spins in the environment with potential capacity for quantum speed up. Beyond a critical value of temperature, there exists a frequency of the spins that reduces the capacity for speeding up quantum evolution. The effects of driving time, nonuniform frequencies of the bath’s spins and coupling strength on QSL time are also investigated.
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The system-environment interaction can be represented by the Krauss decomposition of the quantum channel, E(ρ0)=∑i K†i ρ0 Ki, satisfying ∑i K†i Ki=I.
“The system-environment interaction can be represented by the Krauss decomposition of the quantum channel, E ( ρ 0 ) = ∑ i K † i ρ 0 K i , satisfying ∑ i K † i K i = I.”
From Quantum speed limit time in a relativistic frame (2022) · cites this paper as [32]
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Quantum speed limit time in a relativistic frame
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Self-citationModulation of Quantum Features of a Driven Two-Level System via a rf Field
Sun, S., Meng, X., & Cai, X.-J. (2025) · Quantum Information and Computation · doi:10.2478/qic-2025-0013
- Authors
- Musadiq, M., Khan, S., Javed, M., & Shamirzaie, M.
- Affiliations
- COMSATS University Islamabad (PK)
- University of Malakand (PK)
- Department of Physics, Islamic Azad University, Shehraza, Isfahan 311-86145, Iran
- Corresponding author
- Khan, Salman
- Venue
- International Journal of Quantum Information
- Publisher
- World Scientific Pub Co Pte Ltd
- Published
- 2019-10
- Volume
- 17
- Issue
- 07
- Pages
- 1950054
- ISSN
- 0219-7499 (ISSN-L)
- 1793-6918
- OpenAlex
- W3003965247
- Cited by
- 4
- References
- 33
- Citations by year
- 2025: 1 · 2024: 2 · 2022: 1
- FWCI
- 0.12
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- International Journal of Quantum Information (publishedVersion)
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum and electron transport phenomena
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
- Keywords
- quantum speed limit, spin qubits, open quantum systems, low-temperature limit, driving time, coupling strength, quantum advantage
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