5 papers
On the Origin of Beyond-Classical Advantage in the Parity-Permutation Problem
Jayashree Karmakar, Biswadeep Chatterjee, Rafiuddin Gazi +6
We investigate the task of identifying the parity (odd vs even) of an unknown permutation applied to particles. Classically, using fewer than distinct labels per particle l…
No Absolute Hierarchy of Quantum Complementarity
Kunika Agarwal, Sahil Gopalkrishna Naik, Ananya Chakraborty +4
Bohr's principle of complementarity, prohibiting simultaneous access to certain physical properties within a single experimental arrangement, is considered to be a defining feature…
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…
Superadditivity of Zero-Error Capacity in Noisy Classical and Perfect Quantum Channel Pairs
Ambuj, Anushko Chattopadhyay, Kunika Agarwal +2
We demonstrate superadditivity of one-shot zero-error classical capacity in an asymmetric communication setting where a noisy classical channel is used in parallel with a perfect q…
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…