5 papers
Interference between lossy quantum evolutions activates information backflow
Sutapa Saha, Ujjwal Sen
Quantum evolutions are often non-unitary and in such cases, they are frequently regarded as lossy. Such lossiness, however, does not necessarily persist throughout the evolution, a…
Local Inaccessibility of Random Classical Information and Their Implications in the Change Point Problem
Snehasish Roy Chowdhury, Subhendu B. Ghosh, Tathagata Gupta +4
Discrimination of quantum states under local operations and classical communication (LOCC) is an intriguing question in the context of local retrieval of classical information, enc…
Minimal Help, Maximal Gain: Environmental Assistance Unlocks Encoding Strength
Snehasish Roy Chowdhury, Sutapa Saha, Subhendu B. Ghosh +2
For any quantum transmission line, with smaller output dimension than its input, the number of classical symbols that can be reliably encoded is strictly suboptimal. In other words…
The communication power of a noisy qubit
Giulio Chiribella, Saptarshi Roy, Tamal Guha +1
A fundamental limitation of quantum communication is that a single qubit can carry at most 1 bit of classical information. For an important class of quantum communication channels,…
Bipartite polygon models: entanglement classes and their nonlocal behaviour
Mayalakshmi Kolangatt, Thigazholi Muruganandan, Sahil Gopalkrishna Naik +3
Hardy's argument constitutes an elegantly logical test for identifying nonlocal features of multipartite correlations. In this paper, we investigate Hardy's nonlocal behavior withi…