Superconducting Tetrahedral Quantum Bits
M. V. Feigel’man, L. B. Ioffe, V. B. Geshkenbein, P. Dayal, G. Blatter
DOI 10.1103/PhysRevLett.92.098301 · Physical Review Letters
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Abstract
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.
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