1.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- S.N. Bose National Centre for Basic SciencesIN60 papers
- Saha Institute of Nuclear PhysicsIN55 papers
- Indian Statistical Institute, Bangalore CentreIN51 papers
- Jadavpur UniversityIN41 papers
- University of CalcuttaIN39 papers
- Indian Institute of Science BangaloreIN35 papers
- Institute of Mathematical SciencesIN34 papers
- Indian Institute of Technology MadrasIN28 papers
- Bose InstituteIN27 papers
- Centre National de la Recherche ScientifiqueFR26 papers
- Indian Statistical Institute, Delhi CentreIN20 papers
- Tata Institute of Fundamental ResearchIN20 papers
92 papers · 1 filter
Tube algebra of group-type subfactors
Dietmar Bisch, Paramita Das, Shamindra Kumar Ghosh +1
We describe the tube algebra and its representations in the cases of diagonal and Bisch-Haagerup subfactors possibly with a scalar 3-cocycle obstruction. We show that these categor…
Sparsity Measure of a Network Graph: Gini Index
Swati Goswami, C. A. Murthy, Asit K. Das
This article examines the application of a popular measure of sparsity, Gini Index, on network graphs. A wide variety of network graphs happen to be sparse. But the index with whic…
On Fault-Tolerant Design of Exclusive-OR Gates in QCA
Dharmendra Kumar, Debasis Mitra, Bhargab B. Bhattacharya
Design paradigms of logic circuits with Quantum-dot Cellular Automata (QCA) have been extensively studied in the recent past. Unfortunately, due to the lack of mature fabrication s…
Solutions of the Bogoliubov-de Gennes equation with position dependent Fermi--velocity and gap profiles
M. Presilla, O. Panella, P. Roy
It is shown that bound state solutions of the one dimensional Bogoliubov-de Gennes (BdG) equation may exist when the Fermi velocity becomes dependent on the space coordinate. The e…
On the Bohr inequality
Yusuf Abu Muhanna, Rosihan M. Ali, Saminathan Ponnusamy
The Bohr inequality, first introduced by Harald Bohr in 1914, deals with finding the largest radius , , such that holds whenever $|\su…
Logarithmic coherence: Operational interpretation of -norm coherence
Swapan Rana, Preeti Parashar, Andreas Winter +1
We show that the distillable coherence---which is equal to the relative entropy of coherence---is, up to a constant factor, always bounded by the -norm measure of coherence…
On perfect clustering of high dimension, low sample size data
Soham Sarkar, Anil K. Ghosh
Popular clustering algorithms based on usual distance functions (e.g., Euclidean distance) often suffer in high dimension, low sample size (HDLSS) situations, where concentration o…
Secure Cloud Storage Protocols with Data Dynamics Using Secure Network Coding Techniques
Binanda Sengupta, Akanksha Dixit, Sushmita Ruj
In the age of cloud computing, cloud users with limited storage can outsource their data to remote servers. These servers, in lieu of monetary benefits, offer retrievability of the…
Absolute Non-Violation of a Three-Setting Steering Inequality by Two-Qubit States
Some Sankar Bhattacharya, Amit Mukherjee, Arup Roy +5
Steerability is a characteristic nonlocal trait of quantum states lying in between entanglement and Bell nonlocality. A given quantum state is considered to be steerable if it viol…
The Statistical Face of a Region under Monsoon Rainfall in Eastern India
Kaushik Jana, Debasis Sengupta, Subrata Kundu +2
A region under rainfall is a contiguous spatial area receiving positive precipitation at a particular time. The probabilistic behavior of such a region is an issue of interest in m…
A Dedekind Domain with Nontrivial Class Group
Vaibhav Pandey, Sagar Shrivastava, B. Sury
Analytic properties of function spaces over the real and the complex fields are different in some ways. This reflects in algebraic properties which are different at times and simil…
Extremes of Multi-type Branching Random Walks: Heaviest Tail Wins
Ayan Bhattacharya, Krishanu Maulik, Zbigniew Palmowski +1
We consider a branching random walk on a multi()-type, supercritical Galton-Watson tree which satisfies Kesten-Stigum condition. We assume that the displacements associated with…
Chimera states in uncoupled neurons induced by a multilayer structure
Soumen Majhi, Matjaz Perc, Dibakar Ghosh
Spatial coexistence of coherent and incoherent dynamics in network of coupled oscillators is called a chimera state. We study such chimera states in a network of neurons without an…
Faster Approximation for Maximum Independent Set on Unit Disk Graph
Subhas C. Nandy, Supantha Pandit, Sasanka Roy
Maximum independent set from a given set of unit disks intersecting a horizontal line can be solved in time and space. As a corollary, we design a factor 2 ap…
Existence of unimodular elements in a projective module
Manoj K. Keshari, Md. Ali Zinna
Let be an affine algebra over an algebraically closed field of characteristic with dim. Let be a projective -module of rank with determi…
Oriented Bipartite Graphs and the Goldbach Graph
Sandip Das, Prantar Ghosh, Shamik Ghosh +1
In this paper, we study oriented bipartite graphs. In particular, we introduce "bitransitive" graphs. Several characterizations of bitransitive bitournaments are obtained. We show…
A large sample test for the length of memory of stationary symmetric stable random fields via nonsingular -actions
Ayan Bhattacharya, Parthanil Roy
Based on the ratio of two block maxima, we propose a large sample test for the length of memory of a stationary symmetric -stable discrete parameter random field. We show that t…
Toeplitz and Asymptotic Toeplitz operators on
Amit Maji, Jaydeb Sarkar, Srijan Sarkar
We initiate a study of asymptotic Toeplitz operators on the Hardy space (over the unit polydisc in ). We also study the Toeplitz op…
Bell-CHSH Violation Under Global Unitary Operations: Necessary and Sufficient conditions
Nirman Ganguly, Amit Mukherjee, Arup Roy +3
The relation between Bell-CHSH violation and factorization of Hilbert space is considered here. That is, a state which is local in the sense of the Bell-CHSH inequality under a cer…
A New Family of Divergences Originating from Model Adequacy Tests and Application to Robust Statistical Inference
Abhik Ghosh, Ayanendranath Basu
Minimum divergence methods are popular tools in a variety of statistical applications. We consider tubular model adequacy tests, and demonstrate that the new divergences that are g…
Distributed Computation of Mixing Time
Anisur Rahaman Molla, Gopal Pandurangan
The mixing time of a graph is an important metric, which is not only useful in analyzing connectivity and expansion properties of the network, but also serves as a key parameter in…
Nonparametric Dynamic State Space Modeling of Observed Circular Time Series with Circular Latent States: A Bayesian Perspective
Satyaki Mazumder, Sourabh Bhattacharya
Circular time series has received relatively little attention in statistics and modeling complex circular time series using the state space approach is non-existent in the literatu…
Revisiting optimal eavesdropping in quantum cryptography: Optimal interaction is unique up to rotation of the underlying basis
Atanu Acharyya, Goutam Paul
A general framework of optimal eavesdropping on BB84 protocol was provided by Fuchs et al. [Phys. Rev. A, 1997]. An upper bound on mutual information was derived, which could be ac…
Phase controlled metal-insulator transition in multi-leg quasiperiodic optical lattices
Santanu K. Maiti, Shreekantha Sil, Arunava Chakrabarti
A tight-binding model of a multi-leg ladder network with a continuous quasiperiodic modulation in both the site potential and the inter-arm hopping integral is considered. The mode…