Friday, October 27, 2017 - 3:10pm to 4:00pm  ·  Colloquium
David Mattingly, University of New Hampshire

Quantum gravity, or the merger of general relativity with quantum mechanics, is one of the great unsolved problems in physics.  The difficulties with quantum gravity are conceptual, technical, and experimental:   models for quantum gravity force us to change our very notions of space and time, are often difficult to calculate in, and are very difficult to test.  After a brief introduction to the overall problem of quantum gravity, I will describe some of the progress over the past two decades in developing a useful phenomenology.  I will focus in particular on how experimental tests of spac

Friday, October 20, 2017 - 3:00pm to 4:00pm  ·  Colloquium
Prof. Mohit Randeria, Ohio State University

AbstractThe crossover from Bardeen-Cooper-Schrieffer (BCS) pairing to a Bose-Einstein condensate (BEC) of tightly bound pairs, with increasing attraction between fermions, has long been of interest in theoretical physics.

Friday, October 13, 2017 - 3:00pm to 4:00pm  ·  Colloquium
Dr. Peter Fischer, Berkeley Lawrence National Laboratory

Abstract: Nanomagnetism research which aims to understand and control magnetic properties and behavior on the nanoscale through proximity and confinement, is currently shifting its focus to emerging phenomena occurring on mesoscopic scales.  New avenues to control magnetic materials open up through enhanced complexity and new functionalities, which can impact the speed, size and energy efficiency of spin driven applications.

Friday, October 6, 2017 - 4:00pm to 5:00pm  ·  Colloquium
David Mattingly, UNH

On Tuesday, the Nobel Prize for Physics was awarded for the Detection of Gravitational Waves.  The UNH Physics Department invites all members of the Community for a Public talk this Friday, October 6 in DeMeritt Hall, Room 240 on gravitational waves:  what they are, how they are generated, how we detect them, and why they will open new windows into our universe.
 

Wednesday, September 27, 2017 - 4:00pm to 5:00pm  ·  Colloquium
Dr. Axel Hoffmann, Argonne National Laboratory

The field of spintronics, or magnetic electronics, is maturing and giving rise to new subfields [1].  An important ingredient to the vitality of magnetism research in general is the large complexity due to competitions between interactions crossing many lengthscales and the interplay of magnetic degrees of freedom with charge (electric currents), phonon (heat), and photons (light) [2].  One perfect example, of the surprising new concepts being generated in magnetism research is the recent discovery of magnetic skyrmions.  Magnetic skyrmions are topologically distinct spin textures that are

Monday, May 8, 2017 - 3:00pm to 4:00pm  ·  Colloquium
Friday, April 28, 2017 - 3:00pm to 4:00pm  ·  Colloquium
Michael D. Stewart, Jr., NIST

As modern electronic devices shrink, it is increasingly clear that the future of electronics lies in devices capable of harnessing quantum mechanical effects. Perhaps surprisingly, just as silicon forms the basis of contemporary electronics, silicon could form the basis of quantum electronics. Silicon-based approaches to quantum devices have several advantages: the ability to leverage industrial fabrication techniques, easy integration with CMOS control electronics, excellent coherence times, and the luxury of working in an extremely clean, stable, and well-studied material system.

Wednesday, April 26, 2017 - 3:00pm to 4:00pm  ·  Colloquium
Jamie Kerman, MIT

Classical optimization methods are a vital resource in virtually every large-scale, complex human endeavor, from timely delivery of our mail to the planning of deep-space exploration missions. Because of this ubiquity, any technology which can provide substantial improvements in optimization efficiency or effectiveness has the potential for enormous practical impact.

Friday, April 21, 2017 - 3:10pm to 4:10pm  ·  Colloquium
Prof. Fazel Tafti, Boston College
I will start with an overview on the phenomenon of extreme magnetoresistance (XMR) which is becoming an intense field of research related to topological semimetals. I will explain the importance of a particular family of materials, lanthanum monopnictides, to unveiling the underlying mechanism of XMR.
Friday, April 7, 2017 - 3:00pm to 4:00pm  ·  Colloquium
Daniel Winterhalter, JPL

Non-thermal, low-frequency radio emissions from the Earth, Jupiter, Saturn, Neptune, and Uranus have been observed for decades. They are now "understood" to be caused by the cyclotron-maser instability (CMI) from unstable keV electron distributions in the planetary magnetospheres. It stands to reason that this process is also at work in the purported magnetospheres of extrasolar planets. Particularly from ”Hot Jupiters”, extrasolar Jupiter-size planets that orbit their primary at very close range, we expect the radiated power to be strong enough to allow detection from Earth.