Quantum Interference and Critical Currents of Superconduct- ive Microcircuits Without Josephson Junctions
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{'SignBlockName': 'Lawrence Goldberg', 'PO_EMAI': None, 'PO_PHON': None}
Although most superconducting circuits employed for small-scale                 applications use Josephson conjunctions as an active or switching               element, in some important instances Josephson junctions should be              replaceable by simple thin wires whose dimensions are of the size of            the temperature-dependent coherence length, E(T).  The researchers are          studying theoretically the feasibility of a microcircuit which may              behave in many respects like a SQUID (superconducting quantum                   interference device) circuit without the use of Josephson junctions.            This device may be fabricated by means of a superconducting loop whose          diameter is of the order of magnitude of the coherence length and has           connected to it on opposite sides superconducting wires for the purpose         of injecting an external control current.  Magnetic flux B is applied           perpendicular to the ring.  The flux density gives rise to a                    circulating current.  The circulating current density will be studied           as a function of magnetic flux for various injected control currents,           and these results will be extended to more complicated circuits such as         finite and infinite ladder circuits and arrays.
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