Phys. Rev. Lett. 103, 217003 (2009) [4 pages]Local Current Injection into Mesoscopic Superconductors for the Manipulation of Quantum StatesReceived 12 February 2009; revised 4 May 2009; published 19 November 2009 We perform strategic current injection in a small mesoscopic superconductor and control the (non)equilibrium quantum states in an applied homogeneous magnetic field. In doing so, we realize a current-driven splitting of multiquanta vortices, current-induced transitions between states with different angular momenta, and current-controlled switching between otherwise degenerate quantum states. These fundamental phenomena form the basis for the electronic and logic applications discussed, and are confirmed in both theoretical simulations and multiple-small-tunnel-junction transport measurements. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.217003
DOI:
10.1103/PhysRevLett.103.217003
PACS:
74.78.Na, 74.25.Fy, 74.25.Op, 85.25.−j
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