50 citations · 223 across the 29 of their papers we have counts for
30 papers
Optimal Interaction Free Localization with Multipath Interferometers
Anubhav Chaturvedi, Jorge Escandón-Monardes, Esteban S. Gómez +2
Interaction-free measurement (IFM) certifies the presence of an absorbing object without a photon ever being absorbed by it. When several candidate locations are available, existin…
No Finite NPA Level Characterizes the Complete Quantum Set in the Simplest Bell Scenario
Anubhav Chaturvedi
The Navascués--Pironio--Acín (NPA) hierarchy gives the standard semidefinite outer approximations to quantum behaviors. Whether \emph{any} finite level can already equal the quantu…
Semi-Device-Independent Quantum Key Distribution from Operational Assumptions
Anubhav Chaturvedi, Giuseppe Viola, Ekta Panwar +2
Semi-device-independent quantum key distribution leaves the measurement devices uncharacterized while placing a trusted assumption on Alice's source. We formulate this source assum…
Quantum work beyond classical (commuting) limits
Sumit Rout, Aravinth Balaji Ravichandran, Paweł Horodecki +1
Free energy fixes the maximum work of a thermodynamic process once the state and Hamiltonian are specified. A work-extraction task asks a different question: how much average work…
Communication-constrained nonlocal correlations
Lucas Pollyceno, Denis Freudenheim, José Nogueira +3
Identifying the physical grounds distinguishing quantum theory from broader probabilistic frameworks remains an open challenge. Communication-based proposals -- most notably the pr…
Entanglement assisted communication complexity measured by distinguishability
Satyaki Manna, Ankush Pandit, Anubhav Chaturvedi +1
We investigate the quantum advantage that can arise in typical two-party communication scenarios, where the sender and the receiver are allowed to share prior correlations. Focusin…
High-dimensional detection-loophole-free measurement-device-independent quantum random number generator
Joakim Argillander, Daniel Spegel-Lexne, Martin Clason +4
Certifying random number generators is challenging, especially in security-critical fields like cryptography. Here, we demonstrate a measurement-device-independent quantum random n…
Maximally epistemic models cannot explain gambling with two qubits
Sagnik Ray, Anubhav Chaturvedi, Debashis Saha
We investigate the minimal proof for ruling out maximally epistemic interpretations of quantum theory, in which the indistinguishable nature of two quantum states is fully expl…
Picking NPA constraints from a randomly sampled quantum moment matrix
G. Viola, A. Chaturvedi, P. Mironowicz
We describe a simple and flexible method for implementing semi-definite programming relaxations for bounding the set of quantum correlations. The method relies on obtaining equalit…
Facets of Non-locality and Advantage in Entanglement-Assisted Classical Communication Tasks
Sumit Rout, Anubhav Chaturvedi, Some Sankar Bhattacharya +1
We reveal key connections between non-locality and advantage in correlation-assisted classical communication. First, using the wire-cutting technique, we provide a Bell inequality…
Certifying semi-device-independent security via wave-particle duality experiments
Chithra Raj, Tushita Prasad, Anubhav Chaturvedi +8
Wave-particle duality is known to be equivalent to an entropic uncertainty relation based on the min- and max-entropies, which have a clear operational meaning in quantum cryptogra…
Limits of Classical correlations and Quantum advantages under (Anti-)Distinguishability constraints in Multipartite Communication
Ankush Pandit, Soumyabrata Hazra, Satyaki Manna +2
We consider communication scenarios with multiple senders and a single receiver. Focusing on communication tasks where the distinguishability or antidistinguishability of the sende…
Extending quantum correlations to arbitrary distances via parallel repetition of routed Bell tests
Anubhav Chaturvedi, Marcin Pawłowski, Máté Farkas
Applications such as Device-Independent Quantum Key Distribution (DIQKD) require loophole-free certification of long-distance quantum correlations. However, these distances remain…
Efficient Computation of Generalized Noncontextual Polytopes and Quantum violation of their Facet Inequalities
Soumyabrata Hazra, Debashis Saha, Anubhav Chaturvedi +2
Finding a set of empirical criteria fulfilled by any theory satisfying the generalized notion of noncontextuality is a challenging task of both operational and foundational importa…
Security of device-independent quantum key distribution via monogamy relations from multipartite information causality
Lucas Pollyceno, Anubhav Chaturvedi, Chithra Raj +2
Beyond the foundational significance, the problem of bounding nonlocal correlations by reasonable physical principles has meaningful practical consequences, particularly for device…
Self-testing tilted strategies for maximal loophole-free nonlocality
Nicolas Gigena, Ekta Panwar, Giovanni Scala +3
The degree of experimentally attainable nonlocality, as gauged by the loophole-free or effective violation of Bell inequalities, remains severely limited due to inefficient detecto…
Unbounded quantum advantage in communication complexity measured by distinguishability
Satyaki Manna, Anubhav Chaturvedi, Debashis Saha
Communication complexity is a fundamental aspect of information science, concerned with the amount of communication required to solve a problem distributed among multiple parties.…
Extending loophole-free nonlocal correlations to arbitrarily large distances
Anubhav Chaturvedi, Giuseppe Viola, Marcin Pawłowski
One of the most striking features of quantum theory is that it allows distant observers to share correlations that resist local hidden variable (classical) explanations, a phenomen…
Exponentially decreasing critical detection efficiency for any Bell inequality
Nikolai Miklin, Anubhav Chaturvedi, Mohamed Bourennane +2
We address the problem of closing the detection efficiency loophole in Bell experiments, which is crucial for real-world applications. Every Bell inequality has a critical detectio…
Quantum description of reality is epistemically incomplete
Anubhav Chaturvedi, Marcin Pawłowski, Debashis Saha
We ask whether the operational quantum description is complete at the level of preparations: can the empirically accessible properties of a finite preparation set be reproduced exa…
Mutually Unbiased Balanced Functions & Generalized Random Access Codes
Vaisakh M, Ram krishna Patra, Mukta Janpandit +3
Quantum resources and protocols are known to outperform their classical counterparts in variety of communication and information processing tasks. Random Access Codes (RACs) are on…
Characterising and bounding the set of quantum behaviours in contextuality scenarios
Anubhav Chaturvedi, Máté Farkas, Victoria J Wright
The predictions of quantum theory resist generalised noncontextual explanations. In addition to the foundational relevance of this fact, the particular extent to which quantum theo…
Quantum prescriptions are more ontologically distinct than they are operationally distinguishable
Anubhav Chaturvedi, Debashis Saha
Based on an intuitive generalization of the Leibniz principle of `the identity of indiscernibles', we introduce a novel ontological notion of classicality, called bounded ontologic…
Preparation contextuality as an essential feature underlying quantum communication advantage
Debashis Saha, Anubhav Chaturvedi
The study of ontology (hidden variables) provides for a vital ground on which significant non-classical features of quantum theory are revealed. One such non-classical ontic-featur…