Ratchet effect in dc SQUIDs

Abstract

We analyzed voltage rectification for dc SQUIDs biased with ac current with zero mean value. We demonstrate that the reflection symmetry in the 2-dimensional SQUID potential is broken by an applied flux and with appropriate asymmetries in the dc SQUID. Depending on the type of asymmetry, we obtain a rocking or a simultaneously rocking and flashing ratchet, the latter showing multiple sign reversals in the mean voltage with increasing amplitude of the ac current. Our experimental results are in agreement with numerical solutions of the Langevin equations for the asymmetric dc SQUID.

10 pages including 5 Postscript figures

References in corpus (3)

• Voltage rectification by a SQUID ratchet
• Ratchet potential for fluxons in Josephson-Junction arrays
• Depinning of kinks in a Josephson-junction ratchet array

Cited by in corpus (39)

• Brownian motors: noisy transport far from equilibrium
• Artificial Brownian motors: Controlling transport on the nanoscale
• Diode effect in Josephson junctions with a single magnetic atom
• Dissipation-induced symmetry breaking in a driven optical lattice
• Collective Interaction-Driven Ratchet for Transporting Flux Quanta
• Josephson vortex in a ratchet potential: Theory
• Experimental ratchet effect in superconducting films with periodic arrays of asymmetric potentials
• Broken symmetries and directed collective energy transport
• Rectifying fluctuations in an optical lattice
• Quantum dynamics in strong fluctuating fields
• Resonant activation in a nonadiabatically driven optical lattice
• Rectification and Phase Locking for Particles on Two Dimensional Periodic Substrates
• 3-junction SQUID rocking ratchet
• Diffusion anomalies in ac driven Brownian ratchets
• Fractal structures of normal and anomalous diffusion in nonlinear nonhyperbolic dynamical systems
• Rectification by imprinted phase in a Josephson junction
• Resistive state of SFS Josephson junctions in the presence of moving domain walls
• Quantum Brownian motion in ratchet potentials
• Josephson junction ratchet: effects of finite capacitances
• Josephson diode effect in monolithic dc-SQUIDs based on 3D Dayem nanobridges
• Efficiency of the SQUID Ratchet Driven by External Current
• Ratchet Effect in the Quantum Kicked Rotor and its Destruction by Dynamical Localization
• Experimental realization of a relativistic fluxon ratchet
• Josephson phase diffusion in the SQUID ratchet
• Deterministic Josephson Vortex Ratchet with a load
• Deterministic ratchet from stationary light fields
• Cold atom realizations of Brownian motors
• Thermal ratchet effects in ferrofluids
• Noise rectification by a superconducting loop with two weak links
• Nonlinear dynamics, rectification, and phase locking for particles on symmetrical two-dimensional periodic substrates with dc and circular ac drives
• Soliton Ratchets Induced by Excitation of Internal Modes
• Tunable $\phi$ Josephson Junction ratchet
• Observation of large $h/2e$ and $h/4e$ oscillations in a proximity dc superconducting quantum interference device
• YBa${}_2$Cu${}_3$O${}_7$ Josephson diode operating as a high-efficiency ratchet
• Voltage-current and voltage-flux characteristics of asymmetric high TC DC SQUIDs
• AC field induced quantum rectification effect in tunnel junctions
• Controlling mobility via rapidly oscillating time-periodic stimulus
• Model $I$--$V$ curves and figures of merit of underdamped deterministic Josephson ratchets
• Diffusion and transport in locally disordered driven lattices