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cond-mat.mes-hall2002
Josephson-phase qubit without tunneling
M. H. S. Amin, A. Yu. Smirnov, Alec Maassen van den Brink
We show that a complete set of one-bit gates can be realized by coupling the two logical states of a phase qubit to a third level (at higher energy) using microwave pulses. Thus, o…
cond-mat.mes-hall2002
Comment on `Aharonov--Casher-Effect Suppression of Macroscopic Tunneling of Magnetic Flux'
Alec Maassen van den Brink
A recent Letter [1] has proposed a device, consisting of an rf SQUID with the junction replaced by a double one, i.e. a Bloch transistor. For symmetric Josephson couplings, and for…