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Updated: May 25, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Experimental implementation of the multifunctional compact two-photon state analyzer.

Eva Halenková¹, A Černoch, K Lemr

¹RCPTM, Joint Laboratory of Optics of Palacky University and Institute of Physics of Academy of Sciences of the Czech Republic, Faculty of Science, Palacky University, Olomouc, Czech Republic.

|February 7, 2012

Summary

This summary is machine-generated.

We developed a compact two-photon state analyzer for characterizing quantum states. This device measures spectral properties, indistinguishability, and polarization, enabling full quantum state tomography.

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Area of Science:

Quantum optics
Quantum information science

Background:

Characterizing two-photon quantum states is crucial for quantum information processing.
Existing methods can be complex or limited in scope.

Purpose of the Study:

To experimentally implement a compact, multifunctional two-photon state analyzer.
To provide comprehensive characterization of two-photon quantum states.

Main Methods:

Developed a device operating in two modes: two-photon interference analysis and polarization analysis.
Performed complete two-photon state tomography.
Tested the device using photon pairs from a Kwiat source.

Main Results:

The device successfully analyzed spectral properties and mutual indistinguishability of photons.
Achieved complete two-photon state tomography, estimating the density matrix.
Revealed quantum state purity and negativity from tomography data.

Conclusions:

The implemented multifunctional analyzer is effective for characterizing two-photon states.
The device offers a compact solution for detailed quantum state analysis.
Experimental validation was demonstrated with entangled photon pairs.