From e74b9e24ac95d694365c81570a4b9ff97394855f Mon Sep 17 00:00:00 2001 From: Jaron Kent-Dobias Date: Wed, 7 Nov 2018 15:14:18 -0500 Subject: added aps publicity statement --- aps-publicity.txt | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 aps-publicity.txt (limited to 'aps-publicity.txt') diff --git a/aps-publicity.txt b/aps-publicity.txt new file mode 100644 index 0000000..a626ee7 --- /dev/null +++ b/aps-publicity.txt @@ -0,0 +1,29 @@ + +Beating critical slowness in symmetry-breaking potentials + +A fast method for simulating certain phase transitions has been extended to +a new class of models. + +Nature slows way down near continuous phase transitions. This process, known +as critical slowing down, is characterized by large fluctuations that persist +far longer than the microscopic motion of their constituents suggest. +Computers attempting to simulate nature are slower than nature itself, and the +result can render measurement of critical properties computationally +intractable. For models of nature with certain symmetries, algorithms exist +that eliminate this slowness with clever and unnatural dynamics, transforming +large clusters of microscopic constituents together in a way that resembles +the natural fluctuations. Unfortunately, these methods cannot be directly +applied in the presence of an external potential, like a magnetic field or +lattice interaction, since these break the symmetry these algorithms depend on +to operate. + +We've introduced a way of using cluster algorithms on systems in external +potentials despite broken symmetry. By including the external potential as a +dynamic element of the model that can itself be added to clusters and +transformed along with the rest of the system, the original model's symmetries +are restored. Characteristic states of the modified model are equivalent to +those of the original one provided the accumulated transformations to the +external potential are accounted for and reversed when making measurements. +The extension naturally preserves the efficiency of the original algorithms in +the places where critical slowing down is worst. + -- cgit v1.2.3-70-g09d2