195 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Raman Research InstituteIN29 papers
- Indian Institute of Technology JodhpurIN27 papers
- Manipal Academy of Higher EducationIN19 papers
- Indian Institute of Science BangaloreIN13 papers
- Jaypee Institute of Information TechnologyIN13 papers
- National Institute for Theoretical PhysicsZA11 papers
- University of KwaZulu-NatalZA9 papers
- Bose InstituteIN7 papers
- Chennai Mathematical InstituteIN6 papers
- Institute of Mathematical SciencesIN6 papers
- University of WaterlooCA6 papers
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicCZ5 papers
94 papers · 1 filter
Decoherence Mitigation with Local NOT Gates in Multipartite Systems
Venkat Abhignan, Raghav Sundararaman, Shriram Pragash M +2
We study the entanglement dynamics of -qubit Bell- and GHZ-type states under an amplitude-damping channel (ADC). We quantify multipartite entanglement using the genuine mu…
Decoherence-free subspaces and Markovian revival of genuine multipartite entanglement in a dissipative system
Shubhodeep Gangopadhyay, Vinayak Jagadish, R. Srikanth
We investigate the dynamics of genuine multipartite entanglement (GME) in a system of qubits () collectively interacting with a common zero temperature bosonic bath char…
Effect of Weak Measurement Reversal on Quantum Correlations in a Correlated Amplitude Damping Channel, with a Neural Network Perspective
Venkat Abhignan, Bidyut Bikash Boruah, R. Srikanth +1
We study the evolution of quantum correlations in Bell, Werner, and maximally entangled mixed states of two qubits subjected to correlated amplitude-damping channels. Our primary f…
Quantum steganographic protocols using degenerate and entanglement-assisted quantum codes
Sanjoy Dutta, Nihar Ranjan Dash, Subhashish Banerjee +1
Steganography is the art of concealing secret information by embedding it in an apparently innocent-looking message. Quantum steganography applies the principles of quantum mechani…
Dissipation in fermionic two-body continuous-time quantum walk under the steepest entropy ascent formalism
Rohit Kishan Ray, R. Srikanth, Sonjoy Majumder
Quantum walks play a crucial role in quantum algorithms and computational problems. Many-body quantum walks can reveal and exploit quantum correlations that are unavailable for sin…
On the distinction between distinguishability of states and witness of non-Markovianity of dynamical maps
Vijay Pathak, R. Srikanth
Non-P-divisibility is the strongest divisibility-based notion of quantum non-Markovianity. The generalized trace distance (GTD) based criterion is known to be an optimal witness of…
Bounds on concatenated entanglement-assisted quantum error-correcting codes
Nihar Ranjan Dash, Sanjoy Dutta, R. Srikanth +1
Code concatenation combines two or more component codes to design larger codes with greater noise resilience. Introducing entanglement assistance to concatenated codes provides a f…
Twin-field-based multi-party quantum key agreement
Venkat Abhignan, R. Srikanth
Quantum key distribution (QKD) can secure cryptographic communication between two distant users, as guaranteed by the laws of quantum mechanics rather than computational assumption…
Quantum interpretations, causality and quantum computation
Vivek Kumar, M. P. Singh, R. Srikanth
The interpretation of quantum mechanics continues to be debated, and quantum nonlocality accentuates the puzzle. Quantum interpretations can be classified broadly into two types: r…
Contextuality, superlocality and nonclassicality of supernoncontextuality
Chellasamy Jebarathinam, R. Srikanth
Contextuality is a fundamental manifestation of nonclassicality, indicating that for certain quantum correlations, sets of jointly measurable variables cannot be pre-assigned value…
Concatenating quantum error-correcting codes with decoherence-free subspaces and vice versa
Nihar Ranjan Dash, Sanjoy Dutta, R. Srikanth +1
Quantum error-correcting codes (QECCs) and decoherence-free subspace (DFS) codes provide active and passive means, respectively, to address certain types of errors that arise durin…
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…
Asymmetric One-Sided Semi-Device-Independent Steerability of Quantum Discordant States
Chellasamy Jebarathinam, Debarshi Das, R. Srikanth
Superlocality and superunsteerability provide operational characterization of quantum correlations in certain local and unsteerable states respectively. Such quantum correlated sta…
Experimental realization of quantum non-Markovianity through the convex mixing of Pauli semigroups on an NMR quantum processor
Vaishali Gulati, Vinayak Jagadish, R. Srikanth +1
This experimental study aims to investigate the convex combinations of Pauli semigroups with arbitrary mixing parameters to determine whether the resulting dynamical map exhibits M…
Noninvertibility and non-Markovianity of quantum dynamical maps
Vinayak Jagadish, R. Srikanth, Francesco Petruccione
We identify two broad types of noninvertibilities in quantum dynamical maps, one necessarily associated with CP indivisibility and one not so. We study the production of (non-)Mark…
Quantum counterfactuality with identical particles
Vinod N. Rao, Anindita Banerjee, R. Srikanth
Quantum self-interference enables the counterfactual transmission of information, whereby the transmitted bits involve no particles traveling through the channel. In this work, we…
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…
Measure of invertible dynamical maps under convex combinations of noninvertible dynamical maps
Vinayak Jagadish, R. Srikanth, Francesco Petruccione
We study the convex combinations of the generalized Pauli dynamical maps in a Hilbert space of dimension . For certain choices of the decoherence function, the maps are…
Noninvertibility as a requirement for creating a semigroup under convex combinations of channels
Vinayak Jagadish, R. Srikanth, Francesco Petruccione
We study the conditions under which a semigroup is obtained upon convex combinations of channels. In particular, we study the set of Pauli and generalized Pauli channels. We find t…
Hide and seek with quantum resources: New and modified protocols for quantum steganography
Rohan Joshi, Akhil Gupta, Kishore Thapliyal +2
Steganography is the science of hiding and communicating a secret message by embedding it in an innocent looking text such that the eavesdropper is unaware of its existence. Previo…
The effect of quantum memory on quantum speed limit time for CP-(in)divisible channels
K. G Paulson, Subhashish Banerjee, R. Srikanth
Quantum speed limit time defines the limit on the minimum time required for a quantum system to evolve between two states. Investigation of bounds on speed limit time of quantum sy…
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…
Noiseless attack and counterfactual security of quantum key distribution
Vinod N. Rao, R. Srikanth
Counterfactual quantum key distribution (QKD) enables two parties to share a secret key using an interaction-free measurement. Here, we point out that the efficiency of counterfact…
Distinguishing environment-induced non-Markovianity from subsystem dynamics
Subhashish Banerjee, Javid Naikoo, R. Srikanth
Quantum non-Markovianity modifies the environmental decoherence of a system. This situation is enriched in complex systems owing to interactions among subsystems. We consider the p…