Programmable purification of type-I polarization-entanglement
Simone Cialdi, Davide Brivio, Matteo G A Paris
TL;DR
This paper presents a programmable method to purify polarization entanglement affected by spatial and spectral decoherence in type-I parametric downconversion, enhancing entanglement quality through a spatial light modulator.
Contribution
It introduces a novel, programmable purification scheme using a spatial light modulator to compensate decoherence in polarization-entangled photon generation.
Findings
Effective purification of polarization entanglement demonstrated.
Programmable phase-shifting improves entanglement fidelity.
Technique adaptable to various quantum communication setups.
Abstract
We suggest and demonstrate a scheme to compensate spatial and spectral decoherence effects in the generation of polarization entangled states by type-I parametric downconversion. In our device a programmable spatial light modulator imposes a polarization dependent phase-shift on different spatial sections of the overall downconversion output and this effect is exploited to realize an effective purification technique for polarization entanglement.
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