We consider a one-dimensional superconducting wire where the total number of electrons can be controlled in the Coulomb blockade regime. We predict that a pi-soliton (kink) will spontaneously form in the system when the number of electron is odd, because this configuration has a lower energy. If the wire with an odd number of electrons is closed in a ring, the phase difference on the two sides of the soliton will generate a supercurrent detectable by SQUID. The two degenerate states with the current flowing clockwise or counterclockwise can be utilized as a qbit.
|Original language||English (US)|
|Journal||Journal De Physique. IV : JP|
|State||Published - Nov 1 2002|
|Event||International Workshop on Electronic Crystals - ECRYS 2002 - Saint Flour, France|
Duration: Sep 2 2002 → Sep 7 2002
ASJC Scopus subject areas
- Physics and Astronomy(all)