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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Coherent control in a semiconductor optical amplifier operating at room temperature.

A Capua1, O Karni1, G Eisenstein1

  • 1Electrical Engineering Department, Technion, Haifa 32000, Israel.

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Room temperature semiconductor quantum processors are now feasible. Coherent control experiments directly resolve dephasing times, enabling ultra-high speed quantum computations.

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Area of Science:

  • Quantum physics
  • Semiconductor science
  • Optical phenomena

Background:

  • Quantum decoherence times in semiconductors are extremely short at room temperature, erasing quantum phase within picoseconds.
  • Despite short decoherence, a finite window exists where quantum phase is defined and can be manipulated.

Purpose of the Study:

  • To demonstrate coherent control experiments in room temperature semiconductors.
  • To directly resolve quantum dephasing times using Ramsey-analogous techniques.

Main Methods:

  • Utilizing a room temperature semiconductor optical amplifier to examine optical pulse phase and amplitude.
  • Performing Ramsey-analogous experiments for coherent control.

Main Results:

  • Demonstrated that coherent control is achievable in room temperature semiconductors.
  • Successfully resolved dephasing times by observing Rabi oscillations and coherent control phenomena.
  • Quantum coherent phenomena are accessible via optical pulse propagation analysis.

Conclusions:

  • Coherent control in room temperature semiconductors is a viable technique.
  • This research paves the way for room temperature, semiconductor-based ultra-high speed quantum processors.
  • Potential for scalable and cost-effective manufacturing of quantum devices.