2.1k citations · 2.5k across the 43 of their papers we have counts for
43 papers
Sequential information theoretic protocols in continuous variable systems
Sudipta Das, Ayan Patra, Rivu Gupta +2
In order to enable the sequential implementation of quantum information theoretic protocols in the continuous variable framework, we propose two schemes for resource reusability, r…
Nonclassical resource for continuous variable telecloning with non-Gaussian advantage
Sudipta Das, Rivu Gupta, Himadri Shekhar Dhar +1
The telecloning protocol distributes quantum states from a single sender to multiple receivers via a shared entangled state by exploiting the notions of teleportation and approxima…
Tradeoff between noise and banding in a quantum adder with qudits
Gaurang Agrawal, Tanoy Kanti Konar, Leela Ganesh Chandra Lakkaraju +1
Quantum addition based on the quantum Fourier transform can be an integral part of a quantum circuit and proved to be more efficient than the existing classical ripple carry adder.…
Quantum-enhanced sensing with variable-range interactions
Monika Mothsara, Leela Ganesh Chandra Lakkaraju, Srijon Ghosh +1
The typical bound on parameter estimation, known as the standard quantum limit (SQL), can be surpassed by exploiting quantum resources such as entanglement. To estimate the magneti…
Gender Equity in Physics in India: Interventions, Outcomes, and Roadmap
Srubabati Goswami, Aru Beri, Bindu Bambah +8
The gender imbalance in physics higher education and advanced professions is a global problem, and India is not an exception. Although the issue has been acknowledged widely, discr…
Mimicking quantum correlation of a long-range Hamiltonian by finite-range interactions
Leela Ganesh Chandra Lakkaraju, Srijon Ghosh, Debasis Sadhukan +1
The quantum long-range extended Ising model possesses several striking features that cannot be observed in the corresponding short-range model. We report that the pattern obtained…
Limits of network nonlocality probed by time-like separated observers
Pritam Halder, Ratul Banerjee, Shiladitya Mal +1
In an entanglement swapping scenario, if two sources sharing entangled states between three parties are independent, local correlations lead to a different kind of inequalities tha…
Measurement-based Multipartite Entanglement Inflation
Pritam Halder, Shiladitya Mal, Aditi Sen De
Generating entanglement between more parties is one of the central tasks and challenges in the backdrop of building quantum technologies. Here we propose a measurement-based protoc…
Designing Robust Quantum Refrigerators in Disordered Spin Models
Tanoy Kanti Konar, Srijon Ghosh, Amit Kumar Pal +1
We explore a small quantum refrigerator in which the working substance is made of paradigmatic nearest-neighbor quantum spin models, the XYZ and the XY model with Dzyaloshinskii-Mo…
Detection of unbroken phase of non-Hermitian system via Hermitian factorization surface
Leela Ganesh Chandra Lakkaraju, Aditi Sen De
In the traditional quantum theory, one-dimensional quantum spin models possess a factorization surface where the ground states are fully separable having vanishing bipartite as wel…
Efficient nonlinear witnessing of non-absolutely separable states with lossy detectors
Ayan Patra, Shiladitya Mal, Aditi Sen De
Entangled states are undoubtedly an integral part of various quantum information processing tasks. On the other hand, absolutely separable states which cannot be made entangled und…
Dimensional enhancements in a quantum battery with imperfections
Srijon Ghosh, Aditi Sen De
Power storage devices are shown to increase their efficiency if they are designed by using quantum systems. We show that the average power output of a quantum battery based on a qu…
Noisy quantum input loophole in measurement-device-independent entanglement witnesses
Kornikar Sen, Chirag Srivastava, Shiladitya Mal +2
Entanglement witnesses form an effective method to locally detect entanglement in the laboratory without having the prior knowledge of the full density matrix. However, separable s…
Performance of Dense Coding and Teleportation for Random States --Augmentation via Pre-processing
Rivu Gupta, Shashank Gupta, Shiladitya Mal +1
In order to understand the resourcefulness of a natural quantum system in quantum communication tasks, we study the dense coding capacity (DCC) and teleportation fidelity (TF) of H…
Hierarchies of localizable entanglement due to spatial distribution of local noise
Ratul Banerjee, Amit Kumar Pal, Aditi Sen De
Complete characterization of a noisy multipartite quantum state in terms of entanglement requires full knowledge of how the entanglement content in the state is affected by the spa…
Spreading Nonlocality in Quantum Network
Ratul Banerjee, Srijon Ghosh, Shiladitya Mal +1
Starting from several copies of bipartite noisy entangled states, we design a global and optimal local measurement-based protocol in one- and two-dimensional lattices by which any…
Sequential measurement-device-independent entanglement detection by multiple observers
Chirag Srivastava, Shiladitya Mal, Aditi Sen De +1
Violation of a Bell inequality certifies that the underlying state must be entangled in a device-independent way, although there may exist some entangled states which do not violat…
Characterizing the boundary of the set of absolutely separable states and their generation via noisy environments
Saronath Halder, Shiladitya Mal, Aditi Sen De
We characterize the boundary of the convex compact set of absolutely separable states, referred as {\bf AS}, that cannot be transformed to entangled states by global unitary operat…
Population inversion and entanglement in single and double glassy Jaynes-Cummings models
Ahana Ghoshal, Sreetama Das, Aditi Sen De +1
We find that a suppression of the collapse and revival of population inversion occurs in response to insertion of Gaussian quenched disorder in atom-cavity interaction strength in…
Robustness of interferometric complementarity under Decoherence
Gautam Sharma, Mohd Asad Siddiqui, Shiladitya Mal +2
Interferometric complementarity is known to be one of the most nonclassical manifestations of the quantum formalism. It is commonly known as wave-particle duality and has been stud…
Response of macroscopic and microscopic dynamical quantifiers to the quantum critical region
Stav Haldar, Saptarshi Roy, Titas Chanda +1
At finite temperatures, the quantum critical region (QCR) emerges as a consequence of the interplay between thermal and quantum fluctuations. We seek for suitable physical quantiti…
Signaling versus distinguishing different superpositions of same pure quantum state
Chirag Srivastava, Sreetama Das, Aditi Sen De +1
Different ensembles of quantum states can have the same average nonpure state. Distinguishing between such constructions, via different mixing procedures of the same nonpure quantu…
One-shot conclusive multiport quantum dense coding capacities
Chirag Srivastava, Anindita Bera, Aditi Sen De +1
We introduce a probabilistic version of the one-shot quantum dense coding protocol in both two- and multiport scenarios, and refer to it as conclusive quantum dense coding. Specifi…
Interference-induced localization in quantum random walk on clean cyclic graph
Jayanth Jayakumar, Sreetama Das, Aditi Sen De +1
We quantitatively differentiate between the spreads of discrete-time quantum and classical random walks on a cyclic graph. Due to the closed nature of any cyclic graph, there is ad…