Cited by 14Quantum Computing Algorithms and ArchitectureQuantum Mechanics and ApplicationsSpectral Theory in Mathematical Physics

Evanescence in coined quantum walks

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Carteret, Hilary A, Richmond, Bruce, Temme, Nico M·2005·Journal of Physics A: Mathematical and General

Abstract

In this paper, we complete the analysis begun by two of the authors in a previous work on the discrete quantum walk on the infinite line (Carteret et al 2003 J. Phys. A: Math. Gen. 36 8775–95 ). We obtain uniformly convergent asymptotics for the 'exponential decay' regions at the leading edges of the main peaks in the Schrödinger (or wave mechanics) picture. This calculation required us to generalize the method of stationary phase and we describe this extension in some detail, including self-contained proofs of all the technical lemmas required. We also rigorously establish the exact Feynman equivalence between the path-integral and wave-mechanics representations for this system using some techniques from the theory of special functions. Taken together with the previous work, we can now prove every theorem by both routes.

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Crossref · 10.1088/0305-4470/38/40/011

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  • Positive-energy states of a relativistic particle localized beneath its Compton wavelength exist.

    “These examples demonstrate the existence of positive-energy states of a relativistic particle localized beneath its Compton wavelength [17], despite well-known claims to the contrary.”

    From Relativistic quantum walks (2006) · cites this paper as [17]

    Section 4 discusses evanescent behavior in a coined quantum walk, and the Conclusions describe an analogy with quantum optics. Searches for Compton wavelength, positive-energy relativistic states, and sub-Compton localization found no passage addressing the claimed existence of such states. (LLM, conf=0.77)

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Cites

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Research works printed but not linked: 4

  1. [5]5. Ambainis A, Bach E, Nayak A, Vishwanath A and Watrous J 2001 One-Dimensional Quantum Walks: Proc. 33rd ACM Symposium on Theory of Computation (STOC'01) (Association for Computing Machinery, New York, July 2001) pp 37-49
  2. [10]10. Carteret H A, Ismail M E H and Richmond B 2003 Three routes to the exact asymptotics of the one-dimensional quantum walk J. Phys. A: Math. Gen. 36 8775-95 (Preprint quant-ph/0303105) · arXiv
  3. [15]15. Feynman R P and Hibbs A R 1965 Quantum Mechanics and Path Integrals (New York: McGraw-Hill)
  4. [31]31. Saff E B and Varga R S 1979 The sharpness of Lorentz's theorem on incomplete polynomials Trans. Am. Math. Soc. 249 163-86

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Authors
Carteret, H. A., Richmond, B., & Temme, N. M.
Affiliations
  • Université de Montréal (CA)
  • University of Waterloo (CA)
  • Centrum Wiskunde & Informatica (NL)
Venue
Journal of Physics A: Mathematical and General
Published
2005-09-21
Volume
38
Issue
40
Pages
8641-8665
ISSN
  • 0305-4470 (ISSN-L)
  • 1361-6447
OpenAlex
W2050628998
Cited by
14
References
22
Citations by year
2025: 1 · 2023: 1 · 2012: 3
FWCI
2.47
Type
journal article
Language
en
Open access
Locations
  • Journal of Physics A Mathematical and General (publishedVersion)
  • arXiv (Cornell University) (publishedVersion)
Funders
  • Mitacs
  • University of Waterloo
  • Institut Périmètre de physique théorique
  • Natural Sciences and Engineering Research Council of Canada
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
  • Physical Sciences › Mathematics › Mathematical Physics › Spectral Theory in Mathematical Physics
Keywords
discrete-time quantum walks, asymptotic analysis, exponential decay, stationary phase method, path integral, wave mechanics, special functions

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