Superconducting tetrahedral quantum bits.
We propose a design for a qubit with four superconducting islands in the topology of a symmetric tetrahedron, uniformly frustrated with one-half flux quantum per loop and one-half Cooper pair per island. This structure emulates a noise-resistant spin-1/2 system in a vanishing magnetic field. The flux frustration boosts quantum fluctuations and relieves the constraints on junction fabrication. Variability of manipulation and optimized readout are additional benefits of this design.
Feigel'man
M V
MV
Landau Institute for Theoretical Physics, 117940 Moscow, Russia.
Ioffe
L B
LB
Geshkenbein
V B
VB
Dayal
P
P
Blatter
G
G