|Date||March 21, 2014||Time||3:35 - 5:00 pm|
|Location||Baylor Sciences Building, Room E.125|
Transport Mechanism for Water in Carbon Nanotubes
Prior models for water transport in nanotubes was based around the random walk. Numerical simulations show that the flow rate through the nanotubes is proportional to the number of solitons (in this case, density variation.) The simulations match predictions on models for soliton propagation and give results that are comparable for flow rates found in biological transmembrane channel aquaporin.
Parallels between the Holographic Principle and Massive Gravity
The Holographic Principle postulates that all information in a Volume of space is encoded on the boundary to the region. The most vivid example of it is how the maximal entropy of Black Holes scales as radius squared or in terms of surface area not volume. It plays an important role in String Theory and Quantum Gravity as gravity emerges in these theories in a holographic way. Testing and unifying the Holographic Principle with these theories is an important frontier for Physics. This talk will cover “Holographic Lattices Give the Graviton an Effective Mass” in PRL 112, 071602 (2014). First, the Letter presents how the Holographic principle gives an analytic understanding of how the resistivity of quantum field theories scales with temperature. Second, the Letter shows how massive gravity provides phenomenological way to implement momentum dissipation in holography and reveal also the microscopic components of each. Finally, the Letter shows how the equations describing the quantum perturbations of a holographic lattice coincide with those arising from massive gravity.
For more information contact: Dr. Ken Park 254-710-2282
|Publisher||Department of Physics|
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