Negative correlations can play a positive role in disordered quantum walks
Abstract We investigate the emerging properties of quantum walks with temporal disorder engineered from a binary Markov chain with tailored correlation, C, and disorder strength, r. We show that when the disorder is weak— $$r \ll 1$$ r ≪ 1 —the introduction of negative correlation leads to a counter...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Nature Portfolio
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/5b8e08b0c85246389368720a16884b0c |
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| Sumario: | Abstract We investigate the emerging properties of quantum walks with temporal disorder engineered from a binary Markov chain with tailored correlation, C, and disorder strength, r. We show that when the disorder is weak— $$r \ll 1$$ r ≪ 1 —the introduction of negative correlation leads to a counter-intuitive higher production of spin-lattice entanglement entropy, $$S_e$$ S e , than the setting with positive correlation, that is $$S_e(-|C|)>S_e(|C|)$$ S e ( - | C | ) > S e ( | C | ) . These results show that negatively correlated disorder plays a more important role in quantum entanglement than it has been assumed in the literature. |
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