Abstract
We propose a qubit consisting of a superconducting ring with two zero junctions and one ferromagnetic π junction. In the system, degenerate states appear in the phase space without an external magnetic field because of a competition between the zero and π states. Quantum tunneling between the degenerate states leads to a formation of bonding and antibonding states which are used as a bit. For manipulating the states, only a small magnetic field around zero is required. This feature leads to a large-scale integration and a construction of the smaller-sized qubit which is robust to the decoherence by external noises.
Original language | English |
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Article number | 132501 |
Journal | Applied Physics Letters |
Volume | 88 |
Issue number | 13 |
DOIs | |
Publication status | Published - 2006 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)