Paul M. Goldbart

TL;DR: In this article, the degree to which a pure quantum state is entangled can be characterized by the distance or angle to the nearest unentangled state, where the distance is defined as the distance from the point of view of the nearest neighbor.

TL;DR: In this article, the authors show that the form of the maximally entangled mixed states can vary with the combination of entanglement and mixedness measures chosen, and that for certain combinations, the forms can change discontinuously at a specific value of the entropy, along the way determining the states that, for a given value of entropy, achieve maximal violation of Bell's inequality.

TL;DR: Berry's Phase and Persistent Charge and Spin Currents in Textured Mesoscopic Rings

TL;DR: Cantilever magnetometry measurements performed on mesoscopic samples of Sr2RuO4, a spin-triplet superconductor, show steps in the magnetization with half the height of the ones between integer fluxoid states, consistent with the existence of half-quantum vortices in superconducting Sr2 RuO4.

TL;DR: In this article, it is shown that the spontaneous emergence and dynamics of crystal lattices can be realized using Bose-Einstein condensates coupled to multimode optical cavities.