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Updated: Jun 22, 2026
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Implementation of quantum state tomography for time-bin entangled photon pairs
Hiroki Takesue1, Yuita Noguchi
1NTT Basic Research Laboratories, NTT Corporation, Atsugi, Japan. htakesue@will.brl.ntt.co.jp
Optics Express
|June 25, 2009
Summary
This study introduces quantum state tomography (QST) for time-bin entangled photon pairs, crucial for fiber optic quantum communication. Experiments demonstrate successful QST implementation, paving the way for higher quality quantum networks.
Area of Science:
- Quantum Information Science
- Quantum Optics
- Quantum Communication
Background:
- Quantum state tomography (QST) is vital for assessing entangled photon pairs.
- QST is established for polarization entanglement but not for time-bin entanglement.
- Time-bin entanglement is advantageous for quantum communication over optical fibers.
Purpose of the Study:
- To adapt and implement quantum state tomography (QST) for time-bin entangled photon pairs.
- To demonstrate the feasibility of QST for time-bin entanglement in a practical setting.
Main Methods:
- Utilized a 1-bit delayed interferometer to perform QST.
- Generated time-bin entangled photon pairs via spontaneous four-wave mixing in a dispersion-shifted fiber.
Main Results:
- Successfully implemented QST for time-bin entangled photon pairs.
- Experimental results validated the developed QST method.
Conclusions:
- Quantum state tomography is now applicable to time-bin entanglement.
- This advancement supports the development of high-fidelity quantum communication systems using fiber optics.
