Abstract: The 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.
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.
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.
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
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.
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.
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.
In January the Bulletin of the Atomic Scientists moved the “Doomsday Clock" closer to midnight, stating: "Over the course of 2016, the global security landscape darkened as the international community failed to come effectively to grips with humanity’s most pressing existential threats, nuclear weapons and climate change." This talk will present an objective overview of the nuclear arms race with an emphasis on the current escalating dangers. A brief sketch of how nuclear weapons work and some ironic lessons from history will be presented.