Quantum Superpositions of Persistent Josephson Currents

Doctoral thesis (2001)

Authors

Contributors

J.E. Mooij (promotor)
Faculty
Applied Sciences (AS) (TU Delft)
Copyright: © 2001 C. van der Wal
Quantum computation Josephson effect Macroscopic quantum coherence
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Published Date

24-09-2001

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ISBN:

90-407-2193-9

Faculty

Applied Sciences

Abstract

This thesis presents experimental research on Josephson junction devices that behave quantum mechanically. The devices are formed by micrometer-sized superconducting islands, that are interconnected by a Josephson tunnel junction: a thin insulating layer between two superconductors. With current microfabrication technology it is possible to make very clean and well-defined junctions. The research that is presented in this thesis aimed at investigating whether Josephson junction circuits can have quantum coherent dynamics with a long decoherence time.