Maintaining coherence in quantum computers
Open accessAbstract
The effects of the inevitable coupling to external degrees of freedom of a quantum computer are examined. It is found that for quantum calculations (in which the maintenance of coherence over a large number of states is important), not only must the coupling be small, but the time taken in the quantum calculation must be less than the thermal time scale \ensuremath{\Elzxh}/${\mathit{k}}_{\mathit{B}}$T. For longer times the condition on the strength of the coupling to the external world becomes much more stringent.
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Noise, decoherence, and manufacturing problems make constructing large-scale quantum computers difficult.
“Noise, decoherence, and manufacturing problems make constructing large-scale quantum computers difficult 9-13 .”
From Experimental realization of a quantum algorithm (1998) · cites this paper as [9]
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Research works printed but not linked: 3
- [1][1] Peter W. Shor Algorithms for Quantum Computation: Discrete log and Factoring AT&T Bell Labs preprint May 1994 -
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- Authors
- Unruh, W. G.
- Affiliations
- Canadian Institute for Advanced Research (CA)
- Corresponding author
- Unruh, W. G.
- ORCID
- Unruh, W. G.
- Venue
- Physical Review A
- Publisher
- American Physical Society (APS)
- Published
- 1995-02-01
- Volume
- 51
- Issue
- 2
- Pages
- 992-997
- ISSN
- 0556-2791 (ISSN-L)
- 1050-2947
- 1094-1622
- OpenAlex
- W1967045838
- Cited by
- 594
- References
- 7
- Citations by year
- 2026: 10 · 2025: 19 · 2024: 22 · 2023: 28 · 2022: 19 · 2021: 11 · 2020: 13 · 2019: 12 · 2018: 20 · 2017: 10 · 2016: 16 · 2015: 10 · 2014: 9 · 2013: 11 · 2012: 13
- FWCI
- 53.43
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review A (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- arXiv (Cornell University)
- Funders
- Santa Fe Institute
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
- Keywords
- quantum coherence, quantum computing hardware, decoherence, environmental coupling, coupling strength
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