Crystalline superconductor-semiconductor Josephson junctions for compact superconducting qubits

  1. Jesse Balgley,
  2. Jinho Park,
  3. Xuanjing Chu,
  4. Ethan G. Arnault,
  5. Martin V. Gustafsson,
  6. Leonardo Ranzani,
  7. Madisen Holbrook,
  8. Kenji Watanabe,
  9. Takashi Taniguchi,
  10. Vasili Perebeinos,
  11. James Hone,
  12. and Kin Chung Fong
The narrow bandgap of semiconductors allows for thick, uniform Josephson junction barriers, potentially enabling reproducible, stable, and compact superconducting qubits. We study vertically

Wideband Josephson Parametric Amplifier with Integrated Transmission Line Transformer

  1. Leonardo Ranzani,
  2. Guilhem Ribeill,
  3. Brian Hassick,
  4. and Kin Chung Fong
We describe a wide-band Josephson Parametric Amplifier (JPA) that is impedance-matched using an integrated compact superconducting transmission line transformer. The impedance transformer

Trade off-Free Entanglement Stabilization in a Superconducting Qutrit-Qubit System

  1. Tristan Brown,
  2. Emery Doucet,
  3. Diego Ristè,
  4. Guilhem Ribeill,
  5. Katarina Cicak,
  6. Joe Aumentado,
  7. Ray Simmonds,
  8. Luke Govia,
  9. Archana Kamal,
  10. and Leonardo Ranzani
Quantum reservoir engineering is a powerful framework for autonomous quantum state preparation and error correction. However, traditional approaches to reservoir engineering are hindered

Kinetic Inductance Traveling Wave Amplifiers For Multiplexed Qubit Readout

  1. Leonardo Ranzani,
  2. Mustafa Bal,
  3. Kin Chung Fong,
  4. Guilhem Ribeill,
  5. Xian Wu,
  6. Junling Long,
  7. Hsiang-Sheng Ku,
  8. Robert P. Erickson,
  9. David Pappas,
  10. and Thomas A. Ohki
We describe a kinetic inductance traveling-wave (KIT) amplifier suitable for superconducting quantum information measurements and characterize its wideband scattering and noise properties.