Tuesday, November 7, 2017 - 3:10pm to 4:00pm  ·  Colloquium
Jiadong Zang, UNH

Abstract: Topology is an ancient subject in mathematics that was concluded having no relevance to physics. However, recent development of condensed matter physics gives birth to many topological phenomena. In magnetism, topological spin textures are emergent, including domain walls, vortices, and skyrmions. Chiral magnets are such platforms. They are a series of magnets with broken inversion symmetry.

Friday, November 3, 2017 - 3:10pm to 4:00pm  ·  Colloquium
Jim Connell, University of New Hampshire

High energy (> 1 MeV) particles (ions and electrons) in space are a rich field of study that have many scientific, but also practical, implications.  A continuous source is Galactic cosmic rays.  GCR’s are ions and electrons accelerated in our Galaxy and confined by the Galactic magnetic field, forming a non-thermal gas that diffuses through, but also slowly escapes, the Galaxy.  Another continuous sources are the anomalous cosmic rays, which are believed to be local interstellar gas neutral atoms that becomes ionized in the Solar system and then accelerated at the termination shock.  

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.