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Related Concept Videos

Cascaded Op Amps01:16

Cascaded Op Amps

562
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
562

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On-demand heralded MIR single-photon source using a cascaded quantum system.

Jake Iles-Smith1,2, Mark Kamper Svendsen3,4, Angel Rubio3,5,6

  • 1School of Mathematical and Physical Sciences, The University of Sheffield, Sheffield S10 2TN, UK.

Science Advances
|March 12, 2025
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We present a novel method for generating single mid-infrared (MIR) photons using quantum emitters and cavity quantum electrodynamics (QED). This technique offers a new pathway for creating heralded single photons in a previously inaccessible spectral region.

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Last Updated: May 5, 2026

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Area of Science:

  • Quantum optics
  • Solid-state physics
  • Mid-infrared photonics

Background:

  • Generating single photons in the mid-infrared (MIR) is challenging.
  • Existing methods lack efficiency and determinism in this spectral range.

Purpose of the Study:

  • To propose a novel mechanism for generating single photons in the MIR.
  • To enable quasi-deterministic heralded single photon generation in the MIR spectrum.

Main Methods:

  • Utilizing cavity quantum electrodynamics (QED) to enhance specific transitions.
  • Employing a quantum emitter coupled to a phonon mode and an antenna.
  • Combining macroscopic QED calculations with open quantum system theory.

Main Results:

  • Demonstrating deterministic preparation of a single Fock state of a polar phonon mode.
  • Showing that optimal photon generation occurs at modest light-matter coupling strengths.
  • Proposing a cascaded system for quasi-deterministic heralded single photon emission.

Conclusions:

  • The proposed scheme provides a viable route for generating single MIR photons.
  • This technology can be achieved with current state-of-the-art experimental capabilities.
  • The method opens up new possibilities for quantum technologies in the MIR spectrum.