33,257 research outputs found
Tensor renormalization group approach to 2D classical lattice models
We describe a simple real space renormalization group technique for two
dimensional classical lattice models. The approach is similar in spirit to
block spin methods, but at the same time it is fundamentally based on the
theory of quantum entanglement. In this sense, the technique can be thought of
as a classical analogue of DMRG. We demonstrate the method - which we call the
tensor renormalization group method - by computing the magnetization of the
triangular lattice Ising model.Comment: 4 pages, 7 figure
Assessing the effectiveness of pen-based input queries
In this poster, we describe an experiment exploring the effectiveness of a pen based text input device for use in query construction. Standard TREC queries were written, recognised, and subsequently retrieved upon. Comparisons between retrieval effectiveness based on the recognised writing and a typed text baseline were made. On average, effectiveness was 75% of the baseline. Other statistics on the quality and nature of recognition are also reported
Ions at the air-water interface: An end to one hundred year old mystery?
Availability of highly reactive halogen ions at the surface of aerosols has
tremendous implications for the atmospheric chemistry. Yet neither simulations,
experiments, nor existing theories are able to provide a fully consistent
description of the electrolyte-air interface. In this paper a new theory is
proposed which allows us to explicitly calculate the ionic density profiles,
the surface tension, and the electrostatic potential difference across the
solution-air interface. Predictions of the theory are compared to experiments
and are found to be in excellent agreement. The theory also sheds new light on
one of the oldest puzzles of physical chemistry -- the Hofmeister effect
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