# Recent News

## Сommenting on the famous Bell’s inequalities

PhysicsWorld.com publishes comments written by Prof. Nicolas Gisin about the new book "John Stewart Bell and Twentieth-Century Physics: Vision and Integrity" by Andrew Whitaker. While the debate over quantum theory between the supremely famous physicists, Albert Einstein and Niels Bohr, appeared to have become sterile in the 1930s, Bell was able to revive it and to make crucial advances - Bell's Theorem or Bell's Inequalities. The book describes not only his major contributions to quantum theory, but also his relatively humble origins and struggles to obtain secondary and university education.

## Video - Guest Lecture Quantum key distribution in practice

In the recent video lecture Professor Nicolas Gisin and Dr. Matthieu Legré introduce to the practical implementations of Quantum Key Distribution in ID-Quantique and its commercialisation efforts. They explain the commercial side of Quantum Key Distribution (QKD), Quantum Random Number Generator (QRNG) and their impact for modern technologies.

## TV Interview - La téléportation quantique

In an interview at Radio Télévision Suisse professor Nicolas Gisin, discusses the quantum teleportation phenomena and its influence to future quantum technologies.

## High-Precision Measurement of the Dzyaloshinsky-Moriya Interaction between Two Rare-Earth Ions in a Solid

Our recent paper published in Physical Review Letters has been highlighted as an Editor's Suggestion. There we report on a direct measurement of the pairwise antisymmetric exchange interaction between two rare earth ions in a solid-state material. This interaction is also known as Dzyaloshinsky-Moriya interaction (DMI) and is fundamentally important magnetic phenomena.

To study it we measure electron spin resonance on Nd$^{3+}$ doped single crystals of YVO$_4$ to directly reveal the pairwise anti-symmetric exchange interaction or DMI.

## Light-Matter Micro-Macro Quantum Correlations

Quantum mechanics predicts microscopic phenomena with undeniable success. Nevertheless, current theoretical and experimental efforts still do not yield conclusive evidence that there is or is not a fundamental limitation on the possibility to observe quantum phenomena at the macroscopic scale.

In a recent publication in Physical Review Letters, we report on the generation of entangled state which involves the superposition of two macroscopically distinguishable solid-state components composed of several tens of atomic excitations. Our experiment is clearly demonstrating micro-macro light-matter entanglement.