20 citations · 63 across the 9 of their papers we have counts for
9 papers
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…
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…
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…
On the eternal non-Markovianity of non-unital quantum channels
Shrikant Utagi, Subhashish Banerjee, R. Srikanth
The eternally non-Markovian Pauli channel is an example of a unital channel characterized by a negative decay rate for all time . Here we consider the problem of constructing…
On the non-Markovianity of quantum semi-Markov processes
Shrikant Utagi, Subhashish Banerjee, R. Srikanth
The non-Markovianity of the stochastic process called the quantum semi-Markov (QSM) process is studied using a recently proposed quantification of memory based on the deviation fro…
Singularities, mixing and non-Markovianity of Pauli dynamical maps
Shrikant Utagi, Vinod N. Rao, R. Srikanth +1
Quantum non-Markovianity of channels can be produced by mixing Markovian channels, as observed recently by various authors. We consider an analogous question of whether singulariti…
Quantum causal correlations and non-Markovianity of quantum evolution
Shrikant Utagi
A non-Markovianity measure for quantum channels is introduced based on causality measure - a monotone of causal (temporal) correlations - arising out of the pseudo-density matrix (…
Ping-pong quantum key distribution with trusted noise: non-Markovian advantage
Shrikant Utagi, R. Srikanth, Subhashish Banerjee
The ping-pong protocol adapted for quantum key distribution is studied in the trusted quantum noise scenario, wherein the legitimate parties can add noise locally. For a well-studi…
A class of quasi-eternal non-Markovian Pauli channels and their measure
Shrikant Utagi, Vinod N. Rao, R. Srikanth +1
We study a class of qubit non-Markovian general Pauli dynamical maps with multiple singularities in the generator. We discuss a few easy examples involving trigonometric or other n…