Algorithmic cooling

US6873154B2 · kind B2 · utility

Inventors

• Tal Mor · Coral Springs, US
• Vwani Roychowdhury · Los Angeles, US
• Seth Lloyd · Wellesley, US
• José-Manuel FERNANDEZ · Mount Royal, CA
• Yossi Weinstein · Haifa, IL

Key dates

• Filing date: Jun 16, 2003
• Grant date: Mar 29, 2005
• Expiry date: Jun 16, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/4608
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for decreasing entropy of a quantum system, for example nuclear spins. The quantum system comprising at least two subsystems, a first subsystem of elements with a first relaxation time (hereinafter—computation elements) and a second subsystem of elements with a second relaxation time (hereinafter—reset elements), the second relaxation time being shorter than the first relaxation time. The method comprises adiabatically decreasing the entropy of the computation elements in the system (by entropy compression, entropy transfer, or both) and increasing the entropy of at least some reset elements, so that the entropy of the subgroup of reset elements is overall increased; and waiting for the total entropy of the subgroup of reset elements to decrease, wherein the above two steps are carried out at least once.