3 papers
quant-ph2025
Quantum Incompatibility in Parallel vs Antiparallel Spins
Ram Krishna Patra, Kunika Agarwal, Biswajit Paul +3
We explore the joint measurability of incompatible qubit observables on ensembles of parallel and antiparallel spin-1/2 pairs. In parallel configuration, both spins are prepared in…
quant-ph2024
Nonlocality-Assisted Enhancement of Error-Free Communication in Noisy Classical Channels
Kunika Agarwal, Sahil Gopalkrishna Naik, Ananya Chakraborty +5
The zero-error capacity of a noisy classical channel quantifies its ability to transmit information with absolute certainty, i.e., without any error. Unlike Shannon's standard chan…
quant-ph2023
Tight upper bound of genuine four party Svetlichny type nonlocality with and without local filtering
Sk Sahadat Hossain, Biswajit Paul, Indrani Chattopadhyay +1
Identifying the nonlocality of a multiparty quantum state is an important task in quantum mechanics. Seevinck and Svetlichny [Phys. Rev. Lett. 89, 060401 (2002)], and independently…