Information Theory cs.IT

To keep data secret during computations, many servers are usually involved. Scientists have found a way to reduce their number using quantum entanglement. The new approach works even in challenging conditions and promises to make cloud services safer and cheaper.

Researchers have proved that even a tiny quantum processor can outperform massive classical computers in sorting and analyzing big data. The 'quantum sketch' algorithm was successfully used to decode genes in individual cells and to gauge the sentiment of movie reviews. All of this was accomplished

Scientists have created a three-dimensional structure that, like a Russian doll, shields quantum information from thermal noise layer by layer. The qubit stays stable for a very long time, paving the way for quantum computers that operate without extreme cooling.

The work reveals the fundamental laws of entropy: the ordinary kind (like in computers) and its rarer varieties. All of them obey two rules: the whole is never more chaotic than the sum of its parts, and adding a new element changes the system more if it’s already evenly mixed. This sheds light on t