Temporal shaping of entangled photons

Details Temporal shaping of entangled photons Temporal shaping of entangled photons

2004-11-19

arxiv.org/abs/quant-ph/0411146v2

Phys. Rev. Lett. 94, 073601 (2005)

Physics

Quantum Physics

5 pages, 3 figures, Accepted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.94.073601

We experimentally demonstrate shaping of the two-photon wavefunction of entangled photon-pairs, utilizing coherent pulse-shaping techniques. By performing spectral-phase manipulations we tailor the two-photon wavefunction exactly like a coherent ultrashort pulse. To observe the shaping we perform sum-frequency generation (SFG) with an ultrahigh flux of entangled photons. At the appropriate conditions, SFG performs as a coincidence detector with an ultrashort response time (~100 fs), enabling a direct observation of the two-photon wavefunction. This property also enables us to demonstrate background-free, high-visibility two-photon interference oscillations.

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