91福利

Dimensionless ratios of physical properties can characterize low-temperature phases in a wide variety of materials. As such, the Wilson ratio (WR), the Kadowaki-Woods ratio, and the Wiedemann-Franz law capture essential features of Fermi liquids in metals, heavy fermions, etc. Here we prove that the phases of many-body interacting multicomponent quantum liquids in one dimension can be described by WRs based on the compressibility, susceptibility, and specific heat associated with each component. These WRs arise due to additivity rules within subsystems reminiscent of the rules for multiresistor networks in series and parallel—a novel and useful characteristic of multicomponent Tomonaga-Luttinger liquids independent of microscopic details of the systems.

Congratulations to Dr Gareth Alexander on his promotion to Associate Professor.

Gareth ’s is in the theory of soft matter where, amongst other projects, he applies geometry and topology in original ways to understand defects and textures in liquid crystals, and collective behaviour in soft active matter.

The for the best overall performance in the first year examinations was awarded to Michal Moravec for 2015-16 by Mary Pettifer and David Leadley, Head of Department.

Today, a picture taken by a camera on a typical smartphone can consist of more than 10 million pixels. This is the reality of modern-day cameras and imaging. The ability of record millions of pixels simultaneously will therefore be expected to be a necessary part of any future imaging technology as a matter of course. And that includes quantum enhanced strategies. Measuring (or estimating) multiple parameters simultaneously, however, is one of the fundamental limitations of quantum mechanics. It is what sets quantum mechanics apart from classical physics. What then is the future of quantum enhanced imaging ?