Center for Soft Matter and Biological Physics Friday Discussion Meetings

Fall 2019

Organizer: Vinh Nguyen

These meetings occur on Fridays from 4:00pm to 5:00pm in Robeson 304.
Refreshments are served at 3:45pm (unless otherwise indicated)

August 2019
August 30

Friday 4:00pm
304 Robeson Hall
(poster)

Host:

September 2019
September 6

Friday 4:30pm
304 Robeson Hall
(poster)

Host:

September 13

Friday 4:00pm
304 Robeson Hall
(poster)

Host:

September 20

Friday 4:00pm
304 Robeson Hall
(poster)

.

Host:

September 27

Friday 4:00pm
304 Robeson Hall

(poster)

Host:

October 2019
October 4

Friday 4:00pm
304 Robeson Hall

(poster)

Host:

October 11

Friday 4:00pm
304 Robeson Hall

(poster)

Host:

October 18

Friday 4:00pm
304 Robeson Hall

(poster)

Ahmadreza Azizi (Physics, Virginia Tech)

"Critical Phenomena in Presence of Symmetric Absorbing States"

Phase transitions in non-equilibrium systems have been the subject of many studies in the area of statistical physics. In this talk, I will discuss standard steady-state and time-dependent quantities for models which exhibit a voter-like phase transition, a symmetry-breaking phase transition in absence of bulk noise, and an absorbing phase transition belonging to the Directed Percolation universality class. The Langevin description of systems with two symmetric absorbing states will be introduced and the resulting phase diagram with three different phases (disordered and active, ordered and active, absorbing) separated by critical lines belonging to three different universality classes (generalized voter, Ising, and directed percolation) will be discussed. I also present a proposed microscopic model with two symmetric absorbing states that possesses all the features of the Langevin description.

Advisor: Michel Pleimling

October 25

Friday 4:00pm
304 Robeson Hall

(poster)

Host:

November 2019
November 1

Friday 4:00pm
304 Robeson Hall

(poster)

Host:

November 8

Friday 4:00pm
304 Robeson Hall


(poster)

Host:

November 15

Friday 4:00pm
304 Robeson Hall

(poster)

"TBD"

Host:

November 22

Friday 4:00pm
304 Robeson Hall

(poster)

Host:

November 29

Friday 4:00pm
304 Robeson Hall

(poster)

Thanksgiving Holiday (No Classes)

Host:

December 2019
December 6

Friday 4:00pm
304 Robeson Hall
(poster)

Host:

December 13

Friday 4:00pm
304 Robeson Hall
(poster)

Exam Day (No Classes)

Host:

December 20

Friday 4:00pm
304 Robeson Hall
(poster)

University and Graduate Ceremonies (No Classes)

Host:
December 27

Friday 4:00pm
304 Robeson Hall
(poster)

Holiday (No Classes)

Host:
December 30

Friday 4:00pm
304 Robeson Hall
(poster)

Holiday (No Classes)

Host:
Center for Soft Matter and Biological Physics Friday Discussion Meetings

Spring 2020

Organizer: Vinh Nguyen

These meetings occur on Fridays from 4:00pm to 5:00pm in Robeson 304.
Refreshments are served at 3:45pm (unless otherwise indicated)

January 2020
January 24

Friday 4:00pm
304 Robeson Hall
(poster)

No Discussion Meeting (Physics Faculty Meeting)

Host:

January 31

Friday 4:00pm
304 Robeson Hall
(poster)

No Discussion Meeting (Physics Faculty Meeting)

Host:

February 2020
February 7

Friday, 4:00pm
304 Robeson Hall
(poster)

Dr. Abhishek Singh (Physics, Virginia Tech)

"Insights into Hydration Dynamics at Sub-picosecond Timescales"

The liquid state of water is a very complex system due to hydrogen bonding characteristics. Water forms a transient tetrahedral network with neighboring molecules with a life time of the order of picoseconds. The presence of biomolecules in water matrix distorts the H-bond network and makes the water dynamics slower as a results of hydrogen bonding between biomolecule and water. The electrostatic field exerted by a biomolecules gradually weakens as a function of intermolecular distance between biomolecule and water. This results in hydration layers at the surface of a biomolecule, with hydration water molecules having distinct temporal characteristics. I will talk about some of our recent results on the aqueous solutions of DNA, studied employing an extended megahertz-terahertz frequency domain spectroscopy. Based on the spatio-temporal behavior, water molecules in the aqueous DNA solutions can be classified as tightly-, loosely bound, and bulk water. I will further discuss effective medium approximation at terahertz frequencies for such systems.

Host:

February 14

Friday 4:00pm
304 Robeson Hall
(poster)

"TBD"

Host:

February 21

Friday 4:00pm
304 Robeson Hall
(poster)

No Discussion Meeting (Tenure Track Physics Faculty Meeting)

Host:

February 28

Friday 4:00pm
304 Robeson Hall

(poster)

No Discussion Meeting(Special Joint CSB/CM Seminar)

Host:

March 2020
March 6

Friday 4:00pm
304 Robeson Hall

(poster)

"Spring Break" (APS March Meeting)

Host:

March 13

Friday, 4:00pm
304 Robeson Hall

(poster)

"Spring Break"

Host:

March 20

Friday 4:00pm
304 Robeson Hall

(poster)

No Discussion Meeting (CSB Faculty Meeting)

Host:

March 27

Friday 4:00pm
304 Robeson Hall

(poster)

No Discussion Meeting (Physics Faculty Meeting)

Host:

April 2020
April 3

Friday 4:00pm
304 Robeson Hall

(poster)

No Discussion Meeting (Physics Faculty Meeting)

Host:

April 10

Friday 4:00pm
304 Robeson Hall


(poster)

No Discussion Meeting (Due to COVID-19)

"TBD"

Host:

April 17

Friday 4:00pm
304 Robeson Hall

(poster)

No Discussion Meeting (Physics Faculty Meeting)

Host:

April 24

Friday 4:00pm
304 Robeson Hall

(poster)

No Discussion Meeting (Due to COVID-19)

"TBD"

Host:

May 2020
May 1

Friday 4:00pm
304 Robeson Hall
(poster)

No Discussion Meeting (Due to COVID-19)

"TBD"

Host:

May 8

Friday 4:00pm
304 Robeson Hall
(poster)

"Exam Day" (No Meeting)

Host:

May 15

Monday, 4:00pm
304 Robeson Hall
(poster)

"University Commencement "(No Meeting)

Host: