Non-Hermitian Localization in Biological Networks

April 27, 2016

[reprinted by permission from APS]

In a recent Phys. Rev. E article, David Nelson, together with Ariel Amir (SEAS; formerly Harvard Physics Junior Fellow) and Naomichi Hatano (UTokyo), analyzed the eigenvalues and eigenvectors of certain asymmetric tridiagonal matrices. The authors found a rich and complex behavior in the distribution of eigenvalues and the localization properties of eigenvectors. This has implications that can help understand features of the dynamics of neural networks, as well as neural development in organisms.


Ion Selectivity of Graphene Nanopores

April 22, 2016

Figure 1: Experimental setup* [Reprinted with permission from AAAS]

As population growth continues to outpace development of water infrastructure in many countries, desalination (the removal of salts from seawater) at high energy efficiency will likely become a vital source of fresh water. Due to its atomic thinness combined with its mechanical strength, porous graphene may be particularly well-suited for electrodialysis desalination, in which ions are removed under an electric field via ion-selective pores.


2016 Goldhaber Prize Winners

April 22, 2016

Michael Coughlin (left) and Christopher Frye

Graduate students Michael Coughlin and Christopher Frye won the 2016 Maurice and Gertrude Goldhaber Prize (for experimental and theoretical physics, respectively).

The prize is awarded annually by the department to its most outstanding current PhD students after they pass their qualifying exams, based on their accomplishments, creativity, and innovative approaches to research, as determined by a vote of the faculty.


F-Theory and the Classification of Little Strings

April 14, 2016

Depiction of how to construct the base of an F-theory model for a LST. All LST bases are obtained by adding one additional curve to the base for a 6D SCFT. This additional curve can intersect either one or two curves of the SCFT base. Much as in the study of Lie algebras, LSTs should be viewed as an “affine extension” of SCFTs. [Reprinted by permission from APS.]


New Book by David Morin

April 7, 2016
image of book cover

The new book by David Morin, Probability: For the Enthusiastic Beginner, is written for high school and college students learning about probability for the first time. It will appeal to the reader who has a healthy level of enthusiasm for understanding how and why the various results of probability come about.