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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Time-ordering effects in the generation of entangled photons using nonlinear optical processes
1McLennan Physical Laboratories, University of Toronto, 60 St. George Street, Toronto, Ontario M5S1A7, Canada.
Physical Review Letters
|March 21, 2015
Summary
Time-ordering effects significantly alter photon generation in spontaneous parametric down-conversion (SPDC) and four-wave mixing (SFWM). These modifications are most pronounced when photons interact with the pump beam for extended durations within nonlinear materials.
Area of Science:
- Quantum optics
- Nonlinear optics
- Photonics
Background:
- Spontaneous parametric down-conversion (SPDC) and four-wave mixing (SFWM) are key quantum light sources.
- Understanding photon generation processes is crucial for quantum technologies.
- Joint spectral amplitude (JSA) characterizes photon correlations.
Purpose of the Study:
- Investigate the impact of time-ordering on SPDC and SFWM.
- Develop a predictive model for time-ordering effects on JSA.
- Identify optimal conditions for observing JSA modifications.
Main Methods:
- Theoretical analysis of photon generation dynamics.
- Modeling of time-ordering effects in nonlinear optical processes.
- Examination of the joint spectral amplitude (JSA) under varying conditions.
Main Results:
- Time-ordering effects significantly modify the JSA in SPDC and SFWM.
- These effects are prominent when generated photons overlap with the pump beam in the nonlinear medium.
- Sources producing spectrally separable photons are ideal for observing JSA modifications.
Conclusions:
- Time-ordering is a critical factor influencing photon properties in SPDC and SFWM.
- The duration of photon interaction with the pump beam dictates the significance of time-ordering.
- Exploiting spectrally separable photon sources enhances the study of time-ordering phenomena.
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