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Single-photon transistor in circuit quantum electrodynamics.

Lukas Neumeier1, Martin Leib, Michael J Hartmann

  • 1Technische Universität München, Physik Department, James Franck Straße, 85748 Garching, Germany. lukas-neumeier@gmx.de

Physical Review Letters
|August 27, 2013
PubMed
Summary
This summary is machine-generated.

We developed a novel circuit quantum electrodynamics system for a single-photon transistor. This setup uses interacting transmon qubits to control photon flow, enabling scalable quantum signal processing with high on-off ratios.

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Area of Science:

  • Quantum optics
  • Solid-state quantum information science
  • Circuit quantum electrodynamics

Background:

  • Quantum information processing relies on precise control of quantum states.
  • Single-photon devices are crucial for scalable quantum networks and computation.
  • Circuit quantum electrodynamics (cQED) provides a robust platform for manipulating quantum states.

Purpose of the Study:

  • To introduce a novel cQED architecture for a single-photon transistor.
  • To demonstrate the feasibility of controlling photon propagation using interacting qubits.
  • To explore the scalability of such a device for quantum information applications.

Main Methods:

  • Utilizing two open transmission lines coupled via two interacting transmon qubits.
  • Implementing a cQED architecture where photon propagation in one line is modulated by photons in another.
  • Analyzing the interaction dynamics to achieve high on-off ratios.

Main Results:

  • Demonstrated a single-photon transistor functionality within a cQED framework.
  • Achieved high on-off ratios for photon propagation control with feasible experimental parameters.
  • Established the inherent scalability of the proposed design for cascaded transistor applications.

Conclusions:

  • The proposed cQED setup offers a promising route towards realizing efficient single-photon transistors.
  • The design's scalability facilitates the construction of complex quantum circuits for advanced information processing.
  • This work contributes to the development of fundamental building blocks for quantum technologies.