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Optics Letters

Optics Letters


  • Vol. 15, Iss. 16 — Aug. 15, 1990
  • pp: 912–914

Reversibility and energetics in optical computing

H. John Caulfield, Joseph Shamir, Jacques E. Ludman, and Pal Greguss  »View Author Affiliations

Optics Letters, Vol. 15, Issue 16, pp. 912-914 (1990)

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Computer operations that conserve energy do not, from an information viewpoint, increase entropy and therefore have no minimum energy cost associated with them. An information-conserving operation must be reversible in principle; reversible optical gates inevitably incur losses. The energy per calculation may have many meanings, as we show. The energy expended by a single photon in a conservative optical operation is negligible, much less than kT.

© 1990 Optical Society of America

Original Manuscript: October 10, 1989
Manuscript Accepted: May 14, 1990
Published: August 15, 1990

H. John Caulfield, Jacques E. Ludman, Pal Greguss, and Joseph Shamir, "Reversibility and energetics in optical computing," Opt. Lett. 15, 912-914 (1990)

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