Experimental verification of energy correlations in entangled photon pairs

Soubusta, Jan; Peřina, Jan; Hendrych, Martin; Haderka, Ondřej; Trojek, Pavel; Dušek, Miloslav

doi:10.1016/j.physleta.2003.10.042

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…It is the first proof-of-principle test of a general quantum method of coherent noise eater for qubits which can protect qubits against coherent noise by a partial nondestructive and coherent selection of given number of photons. A weak temporal and spatial coherence of signal and noise can be enhanced by fully classical spectral filtering, as have been many times demonstrated [31,32,33]. It would be an interesting extension of this experiment to combine it with an induction of coherence between the qubit and noise photons.…”

Section: Discussionmentioning

confidence: 63%

Quantum noise eater for a single photonic qubit

et al. 2013

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We propose a quantum noise eater for a single qubit and experimentally verify its performance for recovery of a superposition carried by a dual-rail photonic qubit. We consider a case when only one of the rails (e.g. one of interferometric arms) is vulnerable to noise. A coherent but randomly arriving photon penetrating into this single rail causes a change of its state, which results in an error in a subsequent quantum information processing. We theoretically prove and experimentally demonstrate a conditional full recovery of the superposition by this quantum noise eater. Contents

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Section: Discussionmentioning

confidence: 63%

Quantum noise eater for a single photonic qubit

et al. 2013

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“…[29][30][31] It would be an interesting extension of this experiment to combine it with an induction of coherence between the qubit and noise photons. An experimental proof of a more realistic scenario involving also noise with two-photon contributions would be also interesting.…”

Section: Resultsmentioning

confidence: 99%

Recovery of qubit coherence by noise-eater technique

et al. 2014

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We propose a quantum noise eater for a single qubit and experimentally verify its performance for recovery of a superposition carried by a dual-rail photonic qubit. We consider a case when only one of the rails (e.g., one of interferometric arms) is vulnerable to noise. A coherent but randomly arriving photon penetrating into this single rail causes a change of its state, which results in an error in a subsequent quantum information processing. We theoretically prove and experimentally demonstrate a conditional full recovery of the superposition by this quantum noise eater.

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Hong-Ou-Mandel interferometer with cavities: Theory

et al. 2006

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We study the number of coincidences in a Hong-Ou-Mandel interferometer exit whose arms have been supplemented with the addition of one or two optical cavities. The fourth-order correlation function at the beam-splitter exit is calculated. In the regime where the cavity length are larger than the one-photon coherence length, photon coalescence and anti-coalescence interference is observed. Feynman's path diagrams for the indistinguishable processes that lead to quantum interference are presented. As application for the Hong-Ou-Mandel interferometer with two cavities, it is discussed the construction of an optical XOR gate.

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Experimental verification of energy correlations in entangled photon pairs

Cited by 5 publications

References 31 publications

Quantum noise eater for a single photonic qubit

Quantum noise eater for a single photonic qubit

Recovery of qubit coherence by noise-eater technique

Hong-Ou-Mandel interferometer with cavities: Theory

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