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Stimulated emission tomography.

M Liscidini1, J E Sipe

  • 1Dipartimento di Fisica, Università degli Studi di Pavia, via Bassi 6, I-27100 Pavia, Italy.

Physical Review Letters
|November 26, 2013
PubMed
Summary
This summary is machine-generated.

We found a link between spontaneous and stimulated photon pair generation. This allows for characterizing quantum-correlated photon sources using stimulated emission tomography (SET) with much higher precision.

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Area of Science:

  • Quantum optics
  • Photonics
  • Quantum information science

Background:

  • Parametric fluorescence processes like spontaneous parametric down-conversion (SPDC) and spontaneous four-wave mixing are crucial for generating quantum-correlated photon pairs.
  • Characterizing these sources is essential for quantum technologies but can be limited by low photon detection rates in traditional methods like two-photon quantum state tomography.

Purpose of the Study:

  • To establish a general relationship between spontaneous and stimulated parametric photon generation.
  • To introduce a novel technique, stimulated emission tomography (SET), for characterizing quantum-correlated photon pair sources.
  • To demonstrate the significant advantage of SET in terms of photon detection efficiency compared to existing methods.

Main Methods:

  • Identified a general relation linking the photon pair generation rates of spontaneous parametric processes (SPDC, SFWM) and their corresponding stimulated counterparts (DFG, SFW).
  • Developed and applied stimulated emission tomography (SET) for characterizing two-photon states from SPDC sources.
  • Compared photon detection counts in SET with those in conventional two-photon quantum state tomography.

Main Results:

  • A universal relationship between spontaneous and stimulated parametric down-conversion (SPDC) and stimulated four-wave mixing (SFWM) photon pair generation was established.
  • Stimulated emission tomography (SET) enables source characterization solely through stimulated emission studies.
  • SET can yield detected photon numbers up to 9 orders of magnitude greater than coincidence counts in standard two-photon quantum state tomography.

Conclusions:

  • The established relation provides a fundamental link between spontaneous and stimulated parametric processes.
  • Stimulated emission tomography (SET) offers a highly efficient and precise method for characterizing quantum-correlated photon pair sources.
  • These findings pave the way for advancing the study and application of quantum-correlated photon pairs with unprecedented resolution and precision.