Sub-flux quantum generator

Abstract

A sub-flux quantum generator includes an N-turn ring having a plurality of connected turns about a common aperture. The width of each respective turn in the N-turn ring exceeds the London penetration depth of a superconducting material used to make the respective turn. The generator includes a switching device configured to introduce a reversible localized break in the superconductivity of at least one turn in the N-turn ring. The generator includes a magnetism device configured to generate a magnetic field within the aperture of the N-turn ring. A method for biasing a superconducting structure that encompasses all or a portion of an N-turn ring. While a supercurrent is flowing through the N-turn ring, a quantized magnetic flux is introduced into the aperture of the N-turn ring using a reversible localized break in a turn in the ring. The quantized magnetic flux is trapped in the ring by removal of the localized break. The trapped flux biases the superconducting structure.

1 . A sub-flux quantum generator comprising: 
 an N-turn ring comprising a plurality of connected turns about a common aperture, wherein a width T 50  of each respective turn in said plurality of connected turns exceeds the London penetration depth of a superconducting material used to make the respective turn;    a switching device configured to introduce a localized reversible break in a superconducting current in at least one turn in said plurality of connected turns; and    a magnetism device configured to generate a magnetic field within said common aperture.    
     
     
         2 - 42 . (canceled)