3 papers
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-ph2024
Noise-adapted Quantum Error Correction for Non-Markovian Noise
Debjyoti Biswas, Shrikant Utagi, Prabha Mandayam
We consider the problem of quantum error correction (QEC) for non-Markovian noise. Using the well known Petz recovery map, we first show that conditions for approximate QEC can be…
quant-ph2024
Protocols for counterfactual and twin-field quantum digital signature
Vinod N. Rao, Shrikant Utagi, Anirban Pathak +1
Quantum digital signature (QDS) is the quantum version of its classical counterpart, and can offer security against attacks of repudiation, signature forging and external eavesdrop…