Publications [#368990] of Gleb Finkelstein

Preprints

1. Larson, TFQ; Zhao, L; Arnault, EG; Wei, M-T; Seredinski, A; Li, H; Watanabe, K; Tanaguchi, T; Amet, F; Finkelstein, G, Noise-induced stabilization of dynamical states with broken time-reversal symmetry (December, 2022) [2212.13952] [In preparation]
   (last updated on 2026/01/14)

   Abstract:
   A Josephson junction subject to an external RF excitation may experience the inverse AC Josephson effect, where the phase across the junction locks to the drive. The resulting ``Shapiro steps'' of quantized voltage are currently utilized in primary voltage standards. The effect has also been a key technique in the search for topological superconductivity. Here, we study a particularly interesting regime in which the zero voltage state becomes unstable at zero DC bias, and the junction spontaneously develops the first Shapiro step with a voltage V=±ℏω/2e. The switching time between the +ℏω/2e and −ℏω/2e states ranges from milliseconds to hours. Most interestingly, we find a surprising regime with a non-monotonic temperature dependence, in which the switching time demonstrates a pronounced minimum at intermediate temperatures. Tuning of the measurement parameters is also shown to give rise to a tristable switching behavior, showcasing the potential for further experiments in stochastic physics and quantum thermodynamics.