2014 Spring Physics Graduate Colloquium Series: Ken Call/Yang Liu

DateFebruary 21, 2014Time3:35 - 5:00 pm
LocationBaylor Sciences Building, Room E.125
Description
Ken Call

Creating a Liquid that Exhibits Ferromagnetism


A ferrofluid is a colloidal mixture of magnetic particles and a solvent with the addition of surfactant to keep the particles dispersed. Such fluids can exhibit highly paramagnetic behavior, including extreme deformation of the fluid along applied external magnetic field lines. A ferromagnetic ferrofluid has not been produced until recently. Mertelj et al. have reported that a mixture of plate-like magnetic particle in a Liquid Crystal (LC) solvent, demonstrates the ferromagnetic properties of spontaneous magnetization and hysteresis.

Yang Liu

Strategy to Circumvent the Superselection Rule Arising from CPT Symmetry


Superselection rules forbid certain coherent quantum superpositions. However, superposition rules can be circumvented by consuming appropriate frameness resources, namely, quantum systems whose states are asymmetric with respect to a group G of transformations associated with the requisite frame of reference. In the representation, we review the paper by Michael Skotiniotis et al. that develops a theory of charge-paritytime (CPT) frameness resources to circumvent CPT superselection. Source: Michael Skotiniotis, Borzu Toloui, Ian T. Durham and Barry C. Sanders, Quantum Frameness for CPT Symmetry PRL 111, 020504(2013) Link: http://prl.aps.org/abstract/PRL/v111/i2/e020504

For more information, please contact: Dr. Ken Park 254-710-2282

PublisherPhysics
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