Superconducting Tetrahedral Quantum Bits
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2004
- DOI:
- arXiv:
- arXiv:cond-mat/0407663
- Bibcode:
- 2004PhRvL..92i8301F
- Keywords:
-
- 85.25.Hv;
- 85.25.Cp;
- Superconducting logic elements and memory devices;
- microelectronic circuits;
- Josephson devices;
- Superconductivity;
- Mesoscopic Systems and Quantum Hall Effect
- E-Print:
- 16 pages, 7 figures