6533b7d1fe1ef96bd125c4d9

RESEARCH PRODUCT

Running-phase state in a Josephson washboard potential

Gheorghe Sorin Paraoanu

subject

Josephson effectPhysicsSuperconductivityCondensed matter physicsWave packetCondensed Matter - SuperconductivityFOS: Physical sciencesCondensed Matter PhysicsCondensed Matter::Mesoscopic Systems and Quantum Hall EffectElectronic Optical and Magnetic MaterialsPi Josephson junctionSuperconductivity (cond-mat.supr-con)Quantum mechanicsQubitCondensed Matter::SuperconductivitySuperconducting tunnel junctionQuantum tunnellingQuantum computer

description

We investigate the dynamics of the phase variable of an ideal underdamped Josephson junction in switching current experiments. These experiments have provided the first evidence for macroscopic quantum tunneling in large Josephson junctions and are currently used for state read-out of superconducting qubits. We calculate the shape of the resulting macroscopic wavepacket and find that the propagation of the wavepacket long enough after a switching event leads to an average voltage increasing linearly with time.

yearjournalcountryeditionlanguage
2005-01-12
10.1103/physrevb.72.134528http://arxiv.org/abs/cond-mat/0501280