Possible observation of energy level quantization in an intrinsic Josephson junction

Abstract

Energy level quantization (ELQ) is studied to clarify the macroscopic quantum dynamics of the d-wave Josephson junction (JJ). The influences of the nodal quasiparticles of d-wave superconductivity on the damping effect are numerically evaluated on the basis of a phenomenological model. The calculation, based on realistic parameters for a Bi2Sr2CaCu2O8+d (Bi2212) intrinsic JJ, shows that the observation of ELQ is possible when the sweep rate of the bias current exceeds 10 A/sec. High-sweep- rate measurements (121A/sec) performed on a Bi2212 intrinsic JJ result in the appearance of multiple peaks in the switching current distribution suggesting the realization of ELQ in the d-wave JJ.

5 pages, 3 figures

References in corpus (5)

• Quantum state engineering with Josephson-junction devices
• Macroscopic quantum tunneling in a d-wave high-Tc superconductor
• Enhanced Macroscopic Quantum Tunneling in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Intrinsic Josephson Junction Stacks
• Macroscopic Quantum Tunneling and Quasiparticle Dissipation in d-wave Superconductor Josephson Junctions
• Decoherence due to nodal quasiparticles in d-wave qubits

Cited by in corpus (4)

• Switching Dynamics of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Intrinsic Josephson junctions: Macroscopic Quantum Tunneling and Self-Heating Effect
• Energy-level quantization in YBa2Cu3O7-x phase-slip nanowires
• Theory of two-dimensional macroscopic quantum tunneling in YBa${}_2$ Cu${}_3$ O${}_{7-\delta }$ Josephson junctions coupled to an LC circuit
• Two-dimensional macroscopic quantum dynamics in YBCO Josephson junctions