Shot noise in ultrathin superconducting wires

Abstract

Quantum phase slips (QPS) may produce non-equilibrium voltage fluctuations in current-biased superconducting nanowires. Making use of the Keldysh technique and employing the phase-charge duality arguments we investigate such fluctuations within the four-point measurement scheme and demonstrate that shot noise of the voltage detected in such nanowires may essentially depend on the particular measurement setup. In long wires the shot noise power decreases with increasing frequency $\Omega$ and vanishes beyond a threshold value of $\Omega$ at $T\to 0$

arXiv comment5 pages, 2 figures

References in corpus (8)

• Quantum suppression of superconductivity in ultrathin nanowires
• Quantum Phase Slips in Superconducting Nanowires
• Superconductivity in one dimension
• Reply to the Comment on 'Quantum Phase Slips and Transport in Ultra-Thin Superconducting Wires'
• Quantum Tunneling of the Order Parameter in Superconducting Nanowires
• Quantum fluctuations in ultranarrow superconducting nanowires
• Persistent currents in quantum phase slip rings
• Quantum Phase Slip Noise

Cited by in corpus (2)

• Full counting statistics of quantum phase slips
• Lattice, Charge and Spin phase inhomogeneity in complex striped quantum matter