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N48: Unconventional Superconducting Qubits

Wed. March 6, 11:30 a.m. – 2:18 p.m. CST

200E

Sponsoring Units: DQI,DCMPChair: Joshua CombesSession Tags:
  • Focus

Wed. March 6, 12:42 p.m. – 12:54 p.m. CST

200E

Symmetry plays an important role in various physical systems, giving rise to parity, selection rules, and interference effects. Notably, single-Cooper-pair tunneling across a symmetric Josephson rhombus biased at its frustration point is forbidden, allowing the exploration of multi-Cooper-pair tunneling processes. Here, we report the implementation of an inductively shunted double-Cooper-pair junction in the heavy regime, with circuit parameters tailored to enhance the novel effect. Specifically, we discuss fabrication optimization, control and readout strategy, and decoherence mechanisms of the circuit, establishing the framework for building other types of superconducting circuits with similar topologies. The circuit can also be broadly adapted for potential applications in nano-fabrication testing, quantum metrology, and quantum sensing.

Presented By

  • Hyunseong Kim (University of California, Berkeley)

Authors

  • Hyunseong Kim (University of California, Berkeley)
  • Long B Nguyen (Lawrence Berkeley National Laboratory)
  • Dat Thanh Le (The University of Queensland)
  • Christian Juenger (University of California, Berkeley)
  • Trevor Chistolini (University of California, Berkeley)
  • Bingcheng Qing (University of California, Berkeley)
  • Clarke Smith (Ecole Normale Supérieure)
  • Sai Pavan Chitta (Northwestern University)
  • Tom Stace (The University of Queensland)
  • Jens Koch (Northwestern University)
  • David I Santiago (Lawrence Berkeley National Laboratory)
  • Irfan Siddiqi (University of California, Berkeley)