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Experimental Heat-Bath Cooling of Spins

Authors
  • Brassard, Gilles
  • Elias, Yuval
  • Fernandez, Jose M.
  • Gilboa, Haggai
  • Jones, Jonathan A.
  • Mor, Tal
  • Weinstein, Yossi
  • Xiao, Li
Type
Preprint
Publication Date
Nov 16, 2005
Submission Date
Nov 16, 2005
Identifiers
arXiv ID: quant-ph/0511156
Source
arXiv
License
Unknown
External links

Abstract

Algorithmic cooling is a novel technique to generate ensembles of highly polarized spins, which could significantly improve the signal strength in Nuclear Magnetic Resonance (NMR) spectroscopy. It combines reversible (entropy-preserving) manipulations and irreversible controlled interactions with the environment, using simple quantum computing techniques to increase spin polarization far beyond the Shannon entropy-conservation bound. Notably, thermalization is beneficially employed as an integral part of the cooling scheme, contrary to its ordinary destructive implications. We report the first cooling experiments bypassing Shannon's entropy-conservation bound, performed on a standard liquid-state NMR spectrometer. We believe that this experimental success could pave the way for the first near-future application of quantum computing devices.

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