Universal limitations on quantum key distribution over a network
We consider the distribution of secret keys, both in a bipartite and a multipartite (conference)
setting, via a quantum network and establish a framework to obtain bounds on the …
setting, via a quantum network and establish a framework to obtain bounds on the …
Speed limits on correlations in bipartite quantum systems
Quantum speed limit is bound on the minimum time a quantum system requires to evolve
from an initial state to final state under a given dynamical process. It sheds light on how fast …
from an initial state to final state under a given dynamical process. It sheds light on how fast …
Practical limitations on robustness and scalability of quantum Internet
A Sadhu, MA Somayajula, K Horodecki… - arXiv preprint arXiv …, 2023 - arxiv.org
As quantum theory allows for information processing and computing tasks that otherwise are
not possible with classical systems, there is a need and use of quantum Internet beyond …
not possible with classical systems, there is a need and use of quantum Internet beyond …
Fundamental limitations on the device-independent quantum conference key agreement
We provide several general upper bounds on the rate of a key secure against a quantum
adversary in the device-independent conference key agreement (DI-CKA) scenario. They …
adversary in the device-independent conference key agreement (DI-CKA) scenario. They …
Generalized Hardy's paradox
Here, we present the most general framework for n-particle Hardy's paradoxes, which
include Hardy's original one and Cereceda's extension as special cases. Remarkably, for …
include Hardy's original one and Cereceda's extension as special cases. Remarkably, for …
Increased success probability in Hardy's nonlocality: theory and demonstration
Depending on the way one measures, quantum nonlocality might manifest more visibly.
Using basis transformations and interactions on a particle pair, Hardy logically argued that …
Using basis transformations and interactions on a particle pair, Hardy logically argued that …
Testing of quantum nonlocal correlations under constrained free will and imperfect detectors
In this work, we deal with the relaxation of two central assumptions in standard locally
realistic hidden variable (LRHV) inequalities: free will in choosing measurement settings …
realistic hidden variable (LRHV) inequalities: free will in choosing measurement settings …
Inequivalent Leggett-Garg inequalities
It remains an open question how a realist view of the macroscopic world emerges from a
quantum formalism. For testing the macrorealism in the quantum domain, an interesting …
quantum formalism. For testing the macrorealism in the quantum domain, an interesting …
Quantum mechanical violation of macrorealism for large spin and its robustness against coarse-grained measurements
For multilevel spin systems, robustness of the quantum mechanical (QM) violation of
macrorealism (MR) with respect to coarse-grained measurements is investigated using three …
macrorealism (MR) with respect to coarse-grained measurements is investigated using three …
Leggett–Garg inequality, Wigner form of Leggett–Garg inequality and no-signaling-in-time condition under coarsening measurement
Y Zhang, X Tan - Quantum Information Processing, 2022 - Springer
In this paper, we investigate the Leggett–Garg inequality (LGI), the Wigner form of Leggett–
Garg inequality (WLGI) and the no-signaling-in-time (NSIT) condition under projective and …
Garg inequality (WLGI) and the no-signaling-in-time (NSIT) condition under projective and …