Effect of phase and spatial distinguishability of photon pairs on the entanglement fidelity

Name: Effect of phase and spatial distinguishability of photon pairs on the entanglement fidelity
Author: Kuniyil, Hashir Puthiyapurayil, Durak, Kadir

İsim	Effect of phase and spatial distinguishability of photon pairs on the entanglement fidelity
Yazar	Kuniyil, Hashir Puthiyapurayil, Durak, Kadir
Basım Tarihi:	2021
Basım Yeri	- SPIE
Konu	Entanglement fidelity, Quantum entanglement, Quantum information, Quantum key distribution, Spontaneous parametric down-conversion
Tür	Belge
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	978-151064526-4
Kayıt Numarası	983dc58d-4ccf-4bbd-aeea-fe89658be8a2
Lokasyon	Electrical & Electronics Engineering
Tarih	2021
Notlar	TÜBİTAK
Örnek Metin	Polarization entanglement based cryptography uses the photon pairs generated in a spontaneous parametric down-conversion process and guarantees the security through the violation of Bell's inequality. Certain experimental parameters affects the entanglement fidelity and leads to a possible information leakage. The optical path difference of photons born at different crystals contributes to reduced fidelity, due to the extra birefringence of the nonlinear crystal. Although previous studies suggested methods to erase the distinguishability of photons by introducing compensation crystals, the phase difference, which is due to the lateral ray distribution is not studied. We used two commercially available collection optics; an aspheric and an achromatic lens. With these collection optics, the effect of collection optics on the entanglement fidelity is studied. We developed a simulation of such a system and found that aspheric collection optics is more suitable to achieve high fidelity.
DOI	10.1117/12.2600933
Cilt	11844

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Effect of phase and spatial distinguishability of photon pairs on the entanglement fidelity

Yazar Kuniyil, Hashir Puthiyapurayil, Durak, Kadir

Basım Tarihi 2021

Basım Yeri - SPIE

Konu Entanglement fidelity, Quantum entanglement, Quantum information, Quantum key distribution, Spontaneous parametric down-conversion

Tür Belge

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 978-151064526-4

Kayıt Numarası 983dc58d-4ccf-4bbd-aeea-fe89658be8a2

Lokasyon Electrical & Electronics Engineering

Tarih 2021

Notlar TÜBİTAK

Örnek Metin Polarization entanglement based cryptography uses the photon pairs generated in a spontaneous parametric down-conversion process and guarantees the security through the violation of Bell's inequality. Certain experimental parameters affects the entanglement fidelity and leads to a possible information leakage. The optical path difference of photons born at different crystals contributes to reduced fidelity, due to the extra birefringence of the nonlinear crystal. Although previous studies suggested methods to erase the distinguishability of photons by introducing compensation crystals, the phase difference, which is due to the lateral ray distribution is not studied. We used two commercially available collection optics; an aspheric and an achromatic lens. With these collection optics, the effect of collection optics on the entanglement fidelity is studied. We developed a simulation of such a system and found that aspheric collection optics is more suitable to achieve high fidelity.

DOI 10.1117/12.2600933

Cilt 11844