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quant-ph2025
Detecting and quantifying non-Markovianity via quantum direct cause
Shrikant Utagi, Prateek Chawla
We study the efficacy of the two recently introduced witnesses of non-Markovianity, namely that based on temporal correlations in pseudo-density matrix and temporal steering correl…
quant-ph2025
Quantum walks under superposition of causal order
Prateek Chawla, Shrikant Utagi, C. M. Chandrashekar
We set the criteria under which superposition of causal order can be incorporated in to quantum walks. In particular, we show that only periodic quantum walks or those with at leas…