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Spatial and temporal distribution of phase slips in Josephson junction chains
Adem Ergül1,2, Thomas Weißl3, Jan Johansson4
1Nanostructure Physics, Royal Institute of Technology, SE-106 91, Stockholm, Sweden. adem@kth.se.
Scientific Reports
|September 15, 2017
Summary
We developed a Josephson junction circuit using multiple Superconducting Quantum Interference Devices (SQUIDs). Our simulations and experiments show good agreement in understanding phase-slip centers in superconducting chains.
Area of Science:
- Condensed Matter Physics
- Quantum Computing
Background:
- The Josephson effect describes supercurrent tunneling between superconductors.
- Josephson junction devices are crucial for quantum metrology and superconducting qubits.
Purpose of the Study:
- Develop a Josephson junction circuit by serially connecting multiple Superconducting Quantum Interference Devices (SQUIDs).
- Investigate the behavior of a phase-slip center within this Josephson junction chain.
Main Methods:
- Experimental measurements of DC transport properties.
- Numerical simulations using a classical model with damping and impedance.
- Analysis of phase-slip events and voltage pulses.
Main Results:
- Good agreement found between simulated and experimental current-voltage characteristics.
- Detailed examination of spatial and temporal phase-slip distributions.
- Observation of traveling voltage pulses reflecting at chain edges.
Conclusions:
- The developed Josephson junction chain effectively models phase-slip phenomena.
- Simulations provide insights into the dynamics of superconducting circuits.
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