Quantum correlations, foundations & formalism is a research area in quantum information theory and quantum foundations that studies nonclassical statistical correlations between quantum systems and the mathematical structures underpinning them. It encompasses entanglement, Bell nonlocality, steering, and contextuality, and analyzes their characterization via correlation sets, operator algebras, tensor product structures, resource theories, and generalized probabilistic frameworks. The field investigates axiomatic reconstructions of quantum theory, relationships between different nonclassical correlations, and constraints imposed by causality, information principles, and symmetry. It also explores operational and device-independent formulations, linking foundational questions to cryptography, communication complexity, and many-body physics.
Quantum memories, systems that store and retrieve information leveraging quantum mechanical effects, can outperform classical storage systems on some existing tasks. Yet these promising memories could also complete operations ...
Quantum mechanics, unlike classical physics, allows objects to exist in more than one state at the same time. This idea is often illustrated by Schrödinger's cat, imagined as being both alive and dead until it is observed. ...
General Physics
Jun 8, 2026
0
232
Building useful quantum technologies—from sensors to computers—requires generating highly complex entangled states, in which the properties of particles are deeply intertwined. Producing such states has traditionally required ...
Quantum Physics
Jun 8, 2026
0
20
By definition, elementary particles can't be broken into smaller pieces. But in a new theoretical study published in Physical Review Letters, Johannes Skaar and colleagues have revealed what would happen if you tried anyway ...
Quantum entanglement is a state in which particles are entwined with each other. In this entwined state, the properties of one particle influence the other, even when they aren't physically close to each other. This phenomenon ...
Optics & Photonics
Jun 1, 2026
0
56
Nonlinear interactions between light and matter are at the heart of some of the most powerful tools in modern optics, but pushing these processes to their limits has long been hampered by a fundamental constraint: the stronger ...
Creating perfect randomness is surprisingly difficult. Even modern random number generators never generate completely ideal random numbers: small systematic errors can result in some numbers appearing slightly more frequently ...
Quantum Physics
May 27, 2026
0
509
A new Physical Review Letters study places constraints on the ER = EPR conjecture, showing that under the authors' assumptions, the conjecture would imply possible alterations to the hyperfine structure and effective charge ...
Dark matter is an elusive form of matter that almost never emits, absorbs or reflects light, while only weakly interacting with regular matter. These properties make it very difficult to detect using conventional experimental ...
Researchers from the Institut des NanoSciences de Paris, the Kastler Brossel Laboratory and the University of Glasgow have developed an innovative method that renders a scattering medium transparent solely for information ...
Optics & Photonics
May 20, 2026
0
46
