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Updated: Jun 29, 2025
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Two-dimensional control of a biphoton joint spectrum
Optics Express
|April 4, 2024
Summary
Researchers achieved two-dimensional control over photon pair joint spectral amplitude by simultaneously engineering phase-matching and pump spectrum. This enables versatile quantum state generation for advanced quantum applications.
Area of Science:
- Quantum Optics
- Quantum Information Science
Background:
- Joint spectral amplitude control is crucial for quantum applications, affecting photon indistinguishability and enabling complex quantum functions.
- Previous methods relied on engineering a single degree of freedom, limiting control over spectral quantum correlations.
Purpose of the Study:
- To present a novel approach for two-dimensional control of joint spectral amplitude in photon pairs.
- To generate a variety of spectrally encoded quantum states using this enhanced control.
Main Methods:
- Simultaneously controlling two degrees of freedom: the phase-matching function and the pump spectrum.
- Utilizing custom poling of nonlinear crystals and shaping of pump pulses.
Main Results:
- Achieved two-dimensional control over the joint spectral amplitude.
- Generated diverse quantum states, including frequency uncorrelated states, frequency-bin Bell states, and biphoton qudit states.
- Demonstrated control via photon bunching and anti-bunching, linked to phase-matching function symmetry.
Conclusions:
- The combined approach offers unprecedented control over joint spectral amplitude.
- This method significantly expands the toolkit for generating tailored quantum states for quantum information processing and metrology.
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