Observing the transition from quantum to classical energy correlations\n with photon pairs

2017/11/28 by Stefan Lerch, Lerch, Stefan, André Stefanov +1
Computer Science · Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.1711.10247

openalex publication_date 2017/11/28 · openalex created_date 2022/10/03 · openalex updated_date 2026/07/28

Abstract

We experimentally demonstrate a method to control the relative amount of\nquantum and classical energy correlations between two photons from a pair\nemitted by spontaneous parametric downconversion. Decoherence in the energy\nbasis is achieved by applying random spectral phases on the photons. As a\nconsequence a diverging temporal second order correlation function is observed\nand is explained by a mixture between an energy entangled pure state and a\nfully classically correlated mixte state.\n

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