Quantum phenomona in Unconventional 1D Josephson Arrays
ORAL
Abstract
The largely unexplored regime of low transparency Josephson junction chains with low charging energy EC has attracted theoretical interest since it offers a platform to realize many-body effects in superconducting circuits [1] and quantum phase slip devices [2]. In this work we study the current-voltage characteristics (IVc) of Josephson junction with Josephson energy EJ ~ EC ~ 0.01-1K and temperature range 0.03-1K. We observed the suppression of switching current ISW and finite zero-biased-resistance R0 for different EJ/EC and EJ/T ratios due to thermally activated phase slips and macroscopic quantum phase tunneling.
We will discuss the behavior of ISW and R0 at different temperature and environmental impedance,
and propose potential experimental conditions to observe many-body physics such as localization effects [1] and Bloch oscillations [2] as analogues to condensed matter systems.
1. Nonergodic metallic and insulating phases of Josephson junction chains, M. Pino, L. Ioffe, B. Altshuler, DOI: 10.1073/pnas.1520033113
2. Bloch oscillations in small Josephson junctions, K. Likharev, A. Zorin, DOI: 10.1109/TMAG.1985.1063671
We will discuss the behavior of ISW and R0 at different temperature and environmental impedance,
and propose potential experimental conditions to observe many-body physics such as localization effects [1] and Bloch oscillations [2] as analogues to condensed matter systems.
1. Nonergodic metallic and insulating phases of Josephson junction chains, M. Pino, L. Ioffe, B. Altshuler, DOI: 10.1073/pnas.1520033113
2. Bloch oscillations in small Josephson junctions, K. Likharev, A. Zorin, DOI: 10.1109/TMAG.1985.1063671
*We acknowledge the funding from NSF with award number 1708954
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Presenters
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Wen-Sen Lu
- Rutgers University, New Brunswick