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Related Experiment Videos

Probing decoherence with electromagnetically induced transparency in superconductive quantum circuits.

K V R M Murali1, Z Dutton, W D Oliver

  • 1Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Physical Review Letters
|September 28, 2004
PubMed
Summary

Researchers demonstrate a superconductive analog to electromagnetically induced transparency using quantum circuits. This technique can establish macroscopic coherence and serve as a sensitive probe for decoherence in quantum systems.

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Area of Science:

  • Quantum Computing
  • Superconducting Circuits
  • Quantum Optics

Background:

  • Superconductive quantum circuits exhibit quantized energy levels analogous to atomic systems.
  • These energy levels can be coupled using microwave electromagnetic fields, similar to how atoms interact with laser light.

Purpose of the Study:

  • To present a superconductive analog to electromagnetically induced transparency (EIT).
  • To explore the application of this analog in establishing macroscopic coherence within quantum circuits.
  • To utilize this phenomenon as a sensitive probe for detecting decoherence.

Main Methods:

  • Utilized superconductive quantum circuit designs relevant to current experimental capabilities.
  • Employed microwave electromagnetic fields to couple quantized energy levels within the circuits.

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  • Analogized the system to atomic EIT for conceptual understanding and application.

    • Main Results:

    • Successfully demonstrated a superconductive analog to electromagnetically induced transparency.
    • Showcased the potential for establishing macroscopic coherence in superconducting quantum circuits.
    • Proposed the system as a sensitive method for probing decoherence.

    Conclusions:

    • The superconductive analog to EIT is achievable with present-day technology.
    • Macroscopic coherence can be established in these circuits using this phenomenon.
    • This technique offers a promising new avenue for sensitive decoherence measurements in quantum systems.