Theoretical physicists completely determine the statistics of quantum entanglement

Measuring entanglement entropy in a quantum many-body system

Entanglement, which describes non-local correlations between quantum objects, is very difficult to measure, especially in systems of itinerant particles; here spatial entanglement is measured for ultracold bosonic atoms in optical lattices. Entanglement is one of the most intriguing features of quantum mechanics. It describes non-local correlations between quantum objects, and is at the heart of quantum information sciences. Entanglement is now …

Theoretical physicists completely determine the statistics of quantum entanglement

For the first time, theoretical physicists from the Institute of Theoretical Physics (IPhT) in Paris-Saclay have completely determined the statistics that can be generated by a system using quantum entanglement. This achievement paves the way for exhaustive test procedures for quantum devices.

Similar to humans travelling on a journey of self-discovery, quantum computers are also able to deepen their understanding of their own foundations. Researchers from Tohoku University and St. Paul's School in London have developed a new algorithm that allows quantum computers to analyze and protect quantum entanglement – a [...]

Quantum Computers Take a Leap: New Algorithms Unlock Entanglement's Secrets

Researchers have developed a novel algorithm, the variational entanglement witness (VEW), enhancing quantum computers’ understanding and safeguarding of quantum entanglement. The VEW algorithm allows precise detection of entangled states, overcoming limitations of traditional methods in distinguishing them from separable subspaces. The study introduces nonlocal measurement frameworks that preserve quantum wave functions, minimizing risks of disr…