58 citations · 227 across the 17 of their papers we have counts for
17 papers
Quantum Advantage over Wirings of Nonsignaling Boxes in Multipartite Networks
Peter Bierhorst, Arkaprabha Ghosal, Soumyadip Patra
Quantum-entangled measurements are known to enable multi-party behaviors that are impossible with unentangled measurements on nonlocal resources, even those that are super-quantum…
Quantitative and Optimal Device-Independent Lower Bounds on Detection Efficiency
Arkaprabha Ghosal, Soumyadip Patra, Peter Bierhorst
This paper examines a quantitative and optimal lower bound on the detector efficiency in a (2,2,2) Bell experiment within a fully device-independent framework, whereby the detector…
Repeater-Based Quantum Communication Protocol: Maximizing Teleportation Fidelity with Minimal Entanglement
Arkaprabha Ghosal, Jatin Ghai, Tanmay Saha +2
Transmitting unknown quantum states to distant locations is crucial for distributed quantum information protocols. The seminal quantum teleportation scheme achieves this feat while…
Convex Optimization Approaches to Optimal Teleportation Fidelity in Linear Three-Party Networks
Arkaprabha Ghosal, Jatin Ghai, Tanmay Saha +2
We study the maximum achievable quantum teleportation fidelity between two distant parties, Alice and Charlie, where each of them share a bipartite quantum state only with a common…
Distribution of quantum gravity induced entanglement in many-body systems
Pratik Ghosal, Arkaprabha Ghosal, Somshubhro Bandyopadhyay
Recently, it was shown that if two distant test masses, each in a spatially superposed quantum state, become entangled due to their mutual gravitational interaction, then this enta…
Quantum superposition of causal structures as a universal resource for local implementation of nonlocal quantum operations
Pratik Ghosal, Arkaprabha Ghosal, Debarshi Das +1
Spatial separation restricts the set of locally implementable quantum operations on distributed multipartite quantum systems. We propose that indefinite causal structure arising du…
Locally unidentifiable subset of quantum states and its resourcefulness in secret password distribution
Pratik Ghosal, Arkaprabha Ghosal, Subhendu B. Ghosh +1
We introduce a hitherto unexplored form of quantum nonlocality, termed local subset unidentifiability, that arises from the limitation of spatially separated parties to perfectly i…
Creating quantum correlations in generalized entanglement swapping
Pratapaditya Bej, Arkaprabha Ghosal, Arup Roy +2
We study how different types of quantum correlations can be established as the consequence of a generalized entanglement swapping protocol where starting from two Bell pairs (1, 2)…
Characterizing qubit channels in the context of quantum teleportation
Arkaprabha Ghosal, Debarshi Das, Subhashish Banerjee
We consider a scenario where a party, say, Alice prepares a pure two-qubit (either maximally entangled or non-maximally entangled) state and sends one half of this state to another…
Ability of unbounded pairs of observers to achieve quantum advantage in random access codes with a single pair of qubits
Debarshi Das, Arkaprabha Ghosal, Ananda G. Maity +2
Complications in preparing and preserving quantum correlations stimulate recycling of a single quantum resource in information processing and communication tasks multiple times. He…
Information-disturbance trade-off in generalized entanglement swapping
Pratapaditya Bej, Arkaprabha Ghosal, Debarshi Das +2
We study information-disturbance trade-off in generalized entanglement swapping protocols wherein starting from Bell pairs and , one performs a…
Rating the performance of noisy teleportation using fluctuations in fidelity
Saptarshi Roy, Arkaprabha Ghosal
Quantum teleportation is one of the most pioneering features of the quantum world. Typically, the quality of a teleportation protocol is solely judged by its average fidelity. In t…
Optimal two-qubit states for quantum teleportation vis-à-vis state properties
Arkaprabha Ghosal, Debarshi Das, Saptarshi Roy +1
Quantum teleportation with a two-qubit state can be suitably characterized in terms of maximal fidelity and fidelity deviation, where the former is the maximal value of the average…
Detection of genuine tripartite entanglement by multiple sequential observers
Ananda G. Maity, Debarshi Das, Arkaprabha Ghosal +2
Due to the difficulties present in experimentally preparing genuine tripartite entanglement, it is important to explore the possibility of multiple usage of a single genuine entang…
Fidelity deviation in quantum teleportation with a two-qubit state
Arkaprabha Ghosal, Debarshi Das, Saptarshi Roy +1
Quantum teleportation with an arbitrary two-qubit state can be appropriately characterized in terms of maximal fidelity and fidelity deviation. The former quantifies optimality of…
Facets of bipartite nonlocality sharing by multiple observers via sequential measurements
Debarshi Das, Arkaprabha Ghosal, Souradeep Sasmal +2
Recently, it has been shown that at most two observers (Bobs) can sequentially demonstrate bipartite nonlocality with a spatially separated single observer (Alice) invoking a scena…
Study of Quantum Walk over a Square Lattice
Arkaprabha Ghosal, Prasenjit Deb
Quantum random walk finds application in efficient quantum algorithms as well as in quantum network theory. Here we study the mixing time of a discrete quantum walk over a square l…