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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Superconducting qubits coupled to torsional resonators.

Myung-Joong Hwang1, Jae-Hyuk Choi, Mahn-Soo Choi

  • 1Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|March 16, 2011
PubMed
Summary

We demonstrate strong, tunable coupling between a superconducting phase qubit and a nanomechanical torsional resonator. This enables analysis of quantum correlations within the resonator due to its interaction with the qubit.

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Area of Science:

  • Quantum physics
  • Superconducting circuits
  • Nanomechanics

Background:

  • Superconducting qubits are crucial for quantum computing.
  • Controlling qubit-resonator interactions is key for quantum technologies.
  • Nanomechanical resonators offer tunable properties for hybrid systems.

Purpose of the Study:

  • To propose a scheme for strong and tunable coupling between a superconducting phase qubit and a nanomechanical torsional resonator.
  • To investigate the quantum correlation effects in the resonator induced by this coupling.

Main Methods:

  • Directly modulating the Josephson coupling energy of the phase qubit using the torsional resonator.
  • Analyzing quantum correlations arising from the strong qubit-resonator interaction.

Main Results:

  • Achieved strong and tunable coupling between the qubit and resonator.
  • The coupling strength is significantly large.
  • Identified and analyzed quantum correlation effects in the torsional resonator.

Conclusions:

  • The proposed scheme enables robust control over qubit-resonator interactions.
  • This work opens avenues for exploring quantum phenomena in hybrid quantum systems.
  • The findings are relevant for advancements in quantum information processing and sensing.