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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Microwave photon Fock state generation by stimulated Raman adiabatic passage.

Shavindra P Premaratne1,2, F C Wellstood1,3, B S Palmer1,2

  • 1Department of Physics, University of Maryland, College Park, Maryland 20742, USA.

Nature Communications
|January 28, 2017
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Summary
This summary is machine-generated.

Researchers generated microwave photon Fock states in superconducting circuits using stimulated Raman adiabatic passage. This technique enables deterministic creation of non-classical states for quantum information processing and entanglement studies.

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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Superconducting Circuits

Background:

  • Deterministic generation of non-classical states is crucial for quantum information processing.
  • Preparing Fock states in resonators is challenging due to harmonicity.

Purpose of the Study:

  • To deterministically generate microwave photon Fock states in a superconducting circuit.
  • To demonstrate the generation of arbitrary superpositions of Fock states.

Main Methods:

  • Utilized stimulated Raman adiabatic passage in a superconducting circuit quantum electrodynamics system.
  • Employed a two-photon process to overcome forbidden transitions.
  • Operated a transmon qubit in a 3D microwave cavity at 20 mK.

Main Results:

  • Successfully generated the first, second, and third microwave photon Fock states.
  • Demonstrated the capability to create arbitrary superpositions of Fock states.
  • Achieved fidelities of 89%, 68%, and 43% for the first three Fock states, respectively.

Conclusions:

  • Stimulated Raman adiabatic passage is an effective method for generating Fock states in superconducting circuits.
  • This all-microwave technique offers a pathway for advanced quantum state preparation.
  • The results advance the development of quantum information processing technologies.