Quantum communication through spin chain dynamics: an introductory overview
Open accessAbstract
We present an introductory overview of the use of spin chains as quantum wires, which has recently developed into a topic of lively interest. The principal motivation is in connecting quantum registers without resorting to optics. A spin chain is a permanently coupled 1D system of spins. When one places a quantum state on one end of it, the state will be dynamically transmitted to the other end with some efficiency if the spins are coupled by an exchange interaction. No external modulations or measurements on the body of the chain, except perhaps at the very ends, is required for this purpose. For the simplest (uniformly coupled) chain and the simplest encoding (single qubit encoding), however, dispersion reduces the quality of transfer. We present a variety of alternatives proposed by various groups to achieve perfect quantum state transfer through spin chains. We conclude with a brief discussion of the various directions in which the topic is developing.
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The optimal control method achieved an improvement of the spin-chain transfer time with respect to Ref. [18] of up to two orders of magnitude.
“Indeed, we achieved an improvement of the transfer time with respect to Ref. [18] of up to two orders of magnitude.”
From Optimal Control at the Quantum Speed Limit (2009) · cites this paper as [18]
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- Authors
- Bose, S.
- Affiliations
- University College London (GB)
- Corresponding author
- Bose, Sougato
- ORCID
- Bose, Sougato
- Venue
- Contemporary Physics
- Publisher
- Informa UK Limited
- Published
- 2007-01
- Volume
- 48
- Issue
- 1
- Pages
- 13-30
- ISSN
- 0010-7514 (ISSN-L)
- 1366-5812
- OpenAlex
- W2000976222
- Cited by
- 484
- References
- 9
- Citations by year
- 2026: 15 · 2025: 16 · 2024: 22 · 2023: 23 · 2022: 27 · 2021: 13 · 2020: 28 · 2019: 21 · 2018: 15 · 2017: 29 · 2016: 37 · 2015: 30 · 2014: 29 · 2013: 32 · 2012: 29
- FWCI
- 32.35
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Contemporary Physics (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- 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 › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
- Keywords
- quantum state transfer, spin chains, quantum wires, exchange interaction, perfect state transfer, dispersion, qubit encoding, quantum communication, spin chain dynamics
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