Quantum Decay from Josephson π States
Noriyuki Hatakenaka
DOI 10.1103/PhysRevLett.81.3753 · Physical Review Letters
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Abstract
Quantum decay from Josephson π states, which is inherent in the Josephson system with fixed particle numbers, is investigated. Since the π states have two different decay paths, they can interfere during the decay processes by quantum tunneling due to a topological phase originating from total particle-number restriction and result in parity effect for tunneling.
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