Two-qubit-entanglement in matter created by entangled-photon pairs: A perturbative analysis

Harbola, U and Candelori, L and Klein, JR and Chernyak, VY and Mukamel, S (2024) Two-qubit-entanglement in matter created by entangled-photon pairs: A perturbative analysis. In: AVS Quantum Science, 6 (3).

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Abstract

We study entanglement created between two isolated qubits by interaction with entangled-photon pairs obtained by parametric down-conversion of a laser pump field. The induced entanglement is quantified using the mixed state Concurrence proposed by Wootters et al. Phys. Rev. Lett. 78, 5022 (1997). A universal value of qubit-entanglement, which is independent on the photon-pair wavefunction is identified to leading order in the qubit-field interaction and the pump field amplitude. The qubit entanglement decreases at higher laser pump intensities due to interference between the entangled photon pairs, which creates excitations in the qubit system. Maximal Concurrence is produced by only generating coherences between the ground and the highest excited qubit states. © 2024 Author(s).

Item Type:	Journal Article
Publication:	AVS Quantum Science
Publisher:	American Institute of Physics
Additional Information:	The copyright for this article belongs to the publisher.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	24 Oct 2024 09:05
Last Modified:	25 Oct 2024 05:21
URI:	http://eprints.iisc.ac.in/id/eprint/86484

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