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2020

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cc-by (c) Pérez-Salinas, Adrián et al., 2020
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/183860

Measuring the tangle of three-qubit states

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https://doi.org/10.3390/E22040436

Abstract

We present a quantum circuit that transforms an unknown three-qubit state into its canonical form, up to relative phases, given many copies of the original state. The circuit is made of three single-qubit parametrized quantum gates, and the optimal values for the parameters are learned in a variational fashion. Once this transformation is achieved, direct measurement of outcome probabilities in the computational basis provides an estimate of the tangle, which quantifies genuine tripartite entanglement. We perform simulations on a set of random states under different noise conditions to asses the validity of the method.

Subject

Algorismes, Física, Algorismes computacionals

Subject (English)

Algorithms, Physics, Computer algorithms

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

Citation

PÉREZ-SALINAS, Adrián, et al. Measuring the tangle of three-qubit states. Entropy. 2020. Vol. 22, num. 4, pags. 436-445. ISSN 1099-4300. [consulted: 14 of August of 2026]. Available at: https://hdl.handle.net/2445/183860

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