Optimization of collection optics for maximum fidelity in entangled photon sources

Name: Optimization of collection optics for maximum fidelity in entangled photon sources
Author: Durak, Kadir

İsim	Optimization of collection optics for maximum fidelity in entangled photon sources
Yazar	Durak, Kadir
Basım Tarihi:	2020
Basım Yeri	- TÜBİTAK
Konu	Entanglement fidelity, Optics, Photon pair sources, Quantum optics
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1300-0101
Kayıt Numarası	69470986-b2e6-4640-abd5-4d144b9a998b
Lokasyon	Electrical & Electronics Engineering
Tarih	2020
Notlar	TÜBİTAK
Örnek Metin	In this report, decoherence sources for entangled photons created by spontaneous parametric down-conversion phenomenon are studied. The phase and spatial distinguishability of photon pairs from orthogonal crystals reduce the maximum achievable entanglement fidelity. Carefully chosen compensation crystals are used to erase the phase and spatial traces of down-conversion origins. Emission angle of photon pairs also leads to optical path difference and results in phase distinguishability. A realistic scenario is numerically modelled, where the photon pairs with nonzero emission angle gather a phase difference. These pairs can still be collected and manipulated for practical use but the collection optics adds upon the phase difference. Two commercially available optics for collection; aspheric and achromatic lenses are compared. The numerical simulation results are compared with the experimental results to validate the built model for predicting the maximum achievable entanglement fidelity. The results indicate that the fidelity can be accurately estimated with the presented model by inserting the experimental parameters to it. The study is expected to be very useful for preparation and optimization of entangled photon pair sources in critical phase-matching configuration.
DOI	10.3906/fiz-2007-15
Cilt	44

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Optimization of collection optics for maximum fidelity in entangled photon sources

Yazar Durak, Kadir

Basım Tarihi 2020

Basım Yeri - TÜBİTAK

Konu Entanglement fidelity, Optics, Photon pair sources, Quantum optics

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1300-0101

Kayıt Numarası 69470986-b2e6-4640-abd5-4d144b9a998b

Lokasyon Electrical & Electronics Engineering

Tarih 2020

Notlar TÜBİTAK

Örnek Metin In this report, decoherence sources for entangled photons created by spontaneous parametric down-conversion phenomenon are studied. The phase and spatial distinguishability of photon pairs from orthogonal crystals reduce the maximum achievable entanglement fidelity. Carefully chosen compensation crystals are used to erase the phase and spatial traces of down-conversion origins. Emission angle of photon pairs also leads to optical path difference and results in phase distinguishability. A realistic scenario is numerically modelled, where the photon pairs with nonzero emission angle gather a phase difference. These pairs can still be collected and manipulated for practical use but the collection optics adds upon the phase difference. Two commercially available optics for collection; aspheric and achromatic lenses are compared. The numerical simulation results are compared with the experimental results to validate the built model for predicting the maximum achievable entanglement fidelity. The results indicate that the fidelity can be accurately estimated with the presented model by inserting the experimental parameters to it. The study is expected to be very useful for preparation and optimization of entangled photon pair sources in critical phase-matching configuration.

DOI 10.3906/fiz-2007-15

Cilt 44