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
135 papers
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…
Analytical classification of Majorana zero-mode spatial profiles in extended Kitaev chains: probability maxima can shift inward
Vijay Pathak, Vaishnav Mallya, Sujit Sarkar
Topological phases in one-dimensional superconducting systems are commonly characterized by symmetry-protected invariants. These invariants determine the number of Majorana zero-en…
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…
Unconventional quantum criticality in a non-Hermitian extended Kitaev chain
S Rahul, Nilanjan Roy, Ranjith R Kumar +2
We investigate the nature of quantum criticality and topological phase transitions near the critical lines obtained for the extended Kitaev chain with next nearest neighbor hopping…
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…
Topological phase transition between non-high symmetry critical phases and curvature function renormalization group
Ranjith R Kumar, Y R Kartik, Sujit Sarkar
The interplay between topology and criticality has been a recent interest of study in condensed matter physics. A unique topological transition between certain critical phases has…
Supergranular Fractal Dimension and Solar Rotation
Sowmya G. M., Rajani G., U. Paniveni +1
We present findings from an analysis of the fractal dimension of solar supergranulation as a function of latitude, supergranular cell size and solar rotation, employing spectroheli…
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…
Solar supergranular fractal dimension dependence on the Solar cycle phase
G. Rajani, G. M. Sowmya, U. Paniveni +1
We study the complexity of the supergranular network through fractal dimension by using Ca II K digitized data archive obtained from Kodaikanal solar observatory. The data consists…
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…
Signatures of topological phase transition on a quantum critical line
Ranjith R Kumar, Nilanjan Roy, Y R Kartik +2
Recently topological states of matter have witnessed a new physical phenomenon where both edge modes and gapless bulk coexist at topological quantum criticality. The presence and a…