Negative correlations can play a positive role in disordered quantum walks

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—[Formula: see text] —the introduction of negative correlation leads to a counter-intuitive higher production of spin-lattice entanglement entropy, [Formula: see text] , than the setting with positive correlation, that is [Formula: see text] . These results show that negatively correlated disorder plays a more important role in quantum entanglement than it has been assumed in the literature.