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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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A Josephson radiation comb generator.

P Solinas1, S Gasparinetti2, D Golubev3

  • 1SPIN-CNR, Via Dodecaneso 33, 16146 Genova, Italy.

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|July 21, 2015
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Summary
This summary is machine-generated.

We introduce a Josephson Radiation Comb Generator (JRCG) using superconducting quantum interference devices (SQUIDs) to create precise, evenly spaced voltage pulses. This solid-state device generates hundreds of harmonics, enabling applications in metrology and sub-millimeter wave generation.

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Area of Science:

  • Solid-state physics
  • Quantum electronics
  • Superconductivity

Background:

  • Josephson junctions exhibit unique quantum phenomena.
  • Superconducting Quantum Interference Devices (SQUIDs) are sensitive magnetic flux detectors.
  • Harmonic generation is crucial for frequency standards and signal processing.

Purpose of the Study:

  • To propose and describe a novel Josephson Radiation Comb Generator (JRCG).
  • To demonstrate the generation of a frequency comb using SQUIDs.
  • To explore potential applications in metrology and sub-millimeter wave technology.

Main Methods:

  • Implementation of a dc SQUID driven by an external magnetic field.
  • Utilizing the critical current interference pattern and phase jumps in the SQUID.
  • Generating a sequence of voltage pulses under periodic magnetic flux drive.

Main Results:

  • Generation of sharp, evenly spaced voltage pulses, forming a frequency comb.
  • Capability to produce up to several hundreds of harmonics of the driving frequency.
  • Demonstrated power output of 0.5 nW at 200 GHz using 50 high-critical-temperature SQUIDs at 1 GHz.

Conclusions:

  • The JRCG offers a fully solid-state, on-chip integrable solution for radiation comb generation.
  • This technology has significant potential for advancements in metrology.
  • The JRCG can enable new applications in sub-millimeter wave generation and signal processing.