Quantum Phase Slips in one-dimensional Josephson Junction Chains

Abstract

We have studied quantum phase-slip (QPS) phenomena in long one-dimensional Josephson junction series arrays with tunable Josephson coupling. These chains were fabricated with as many as 2888 junctions, where one sample had a tunable weak link in the middle. Measurements were made of the zero-bias resistance, $R_0$, as well as current-voltage characteristics (IVC). The finite $R_0$ is explained by QPS and shows an exponential dependence on $\sqrt{E_J/E_C}$ with a distinct change in the exponent at $R_0=R_Q=h/4e^2$. When $R_0>R_Q$ the IVC clearly shows a remnant of the Coulomb blockade, which evolves to a zero-current state with a sharp critical voltage as $E_J$ is tuned to a smaller value. The zero-current state below the critical voltage is due to coherent QPS and we show that these are enhanced at the central weak link. Above the critical voltage a negative differential resistance is observed which nearly restores the zero-current state.

References in corpus (5)

• Implementation of low-loss superinductances for quantum circuits
• Progress in Superconducting Metamaterials
• Coulomb blockade and Bloch oscillations in superconducting Ti nanowires
• Symmetries and collective excitations in large superconducting circuits
• Phase-sticking in one-dimensional Josephson Junction Chains

Cited by in corpus (25)

• The superconducting quasicharge qubit
• A tunable Josephson platform to explore many-body quantum optics in circuit-QED
• Quantum electrodynamics of a superconductor-insulator phase transition
• Insulating Josephson-junction chains as pinned Luttinger liquids
• Observation of quantum many-body effects due to zero point fluctuations in superconducting circuits
• Bloch band dynamics of a Josephson junction in an inductive environment
• One-dimensional Josephson junction arrays: Lifting the Coulomb blockade by depinning
• Superconductor-Insulator Transition in disordered Josephson junction chains
• Photon-instanton collider implemented by a superconducting circuit
• From quantum to thermal topological-sector fluctuations of strongly interacting bosons in a ring lattice
• Superconductor-insulator transition in Josephson junction chains by quantum Monte-Carlo
• Cooling arbitrary near-critical systems using hyperbolic quenches
• Tunable ohmic environment using Josephson junction chains
• Theory of coherent quantum phase-slips in Josephson junction chains with periodic spatial modulations
• Decay of plasmonic waves in Josephson junction chains
• Quantum phase transitions in non-Hermitian $\mathcal{P}\mathcal{T}$-symmetric transverse-field Ising spin chains
• Parity effect and single-electron injection for Josephson-junction chains deep in the insulating state
• Magnetic field-tuned superconductor/insulator transition in TiN nanostrips
• Collective quantum phase slips in multiple nanowire junctions
• Quantum heat waves in a one-dimensional condensate
• Universal power-law decay of electron-electron interactions due to nonlinear screening in a Josephson junction array
• Modeling and simulations of quantum phase slips in ultrathin superconducting wires
• Effect of disorder on coherent quantum phase slips in Josephson junction chains
• Nonequilibrium plasmon liquid in a Josephson junction chain
• Room-temperature superconductivity in an artificial 2D Mott-insulating square lattice and its advanced condensed phase that generates a low-loss current in the atmosphere: A possible perpetual motion machine