News

Physics graduate student one of 52 named to DOE research program

October 20, 2020 • Categories: News

Physics graduate student Patrick Fasano has been named a member of the U.S. Department of Energy’s Office of Science Graduate Student Research Program (SCGSR). This biannual award will allow him to perform theoretical nuclear physics thesis research at the DOE-led Lawrence Berkeley National Laboratory (LNBL).

Society of Physics Students (SPS) co-hosts the first-ever “Love Your Brain” event

October 13, 2020 • Categories: News

The Notre Dame chapter of the Society of Physics Students (SPS), in collaboration with Access-ABLE club, held the first-ever “Love Your Brain” event last Friday by the Clarke Memorial Fountain.

Coordinators handed out black and white bandanas with images of brains provided that read, “I love my brain.” Participants filled in the blank with a word describing their brain and then color their bandana with sharpies. The bandana was dipped in rubbing alcohol to blend the colors, symbolizing the beautiful messiness of our brains.…

Midwest Relativity Meeting 2020 to be hosted by Notre Dame

September 29, 2020 • Categories: News

The 30th Annual Midwest Relativity Meeting will be hosted by the Center for Astrophysics and the Department of Physics of the University of Notre Dame from October 21-24, 2020.

The Midwest Relativity Meetings aim to bring together researchers from across the Midwest and beyond to discuss General Relativity and a broad range of topics in gravitational physics, including classical and quantum gravity, numerical relativity, relativistic astrophysics, cosmology, gravitational waves, experimental gravity, and other related topics.…

Hsu, a condensed matter physics theorist, studies properties of superconductors

September 24, 2020 • Categories: News

Condensed matter physicist Yi-Ting Hs, a theorist, joined the Notre Dame faculty in the Department of Physics last month, and enjoys working with experimental physicists to dig beneath their applications and discoveries, unearthing the science behind how to improve them.

Graduate student Sensharma speaks at Michiana Science Cafe event

September 21, 2020 • Categories: News

Michiana Science Cafe

Nuclear physics graduate student Nirupama Sensharma will speak on Tuesday, September 29 at the Michiana Science Cafe on nuclear energy. Her talk "Nuclear Energy -- The Better Energy?" will be a Facebook live event. The United States depends on nuclear power to meet about one-fifth of its demand for electricity. This equals the combined total of the generation capacity of two leading nuclear power producing countries, France and Japan. However, we have been standing still for the last 30 years with absolutely no progress in this sector. Is the halt a result of economic, political or scientific reasons and how is this affecting the ever-escalating climate crises? Do we have an alternative?…

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Events

Wed Oct 21, 2020

Physics Colloquium: Prof. Alex Lazarian, University of Wisconsin-Madison

4:00 PM - 5:00 PM
zoom

Measuring magnetic field strength using velocity gradient

Prof. Alex Lazarian
Department of Astronomy, University of Wisconsin-Madison

Magnetic field measurements using dust polarization and spectral line widths is known as Chandrasekhar-Fermi technique. This technique is widely used for studying magnetic fields in interstellar media. I will discuss first the new technique that can provide higher accuracy using less amount of polarization and spectral line data. Then I will discuss how to obtain magnetic field strength without polarization information and also in the situations when the traditional technique is not applicable. Finally, I will discuss how to get the 3D distribution of magnetic field strength in the interstellar medium.…

Posted In: Colloquia

Thu Oct 22, 2020

Condensed Matter Research Seminar: Allan Leishman, University of Notre Dame

4:00 PM - 5:00 PM
zoom

Measuring topological stability of magnetic skyrmions

Allan Leishman, Physics Graduate Student
University of Notre Dame

Magnetic skyrmions show promise for future data storage applications due to their small size and observation at a wide range of temperatures and magnetic fields.  Key to their surprising stability is a topological energy barrier which must be overcome to create or destroy a skyrmion in a magnetic material.  Understanding the nature of this energy barrier and how to maximize it is essential to the longstanding goal of building nanoscale skyrmion devices at room temperature and zero applied field. We have developed a novel method for measuring the topological energy barrier of skyrmion lattices (SkL) and have used it to characterize the prototypical skyrmion hosting material MnSi. Using small angle neutron scattering (SANS) we have observed a small hysteresis associated with entering and leaving the SkL phase. By modelling this hysteresis with an adapted Preisach free energy curve, we can extract the SkL energy barrier and infer information about the microscopic details of the phase transition.  Combining our SANS result  with atomistic spin simulations, we conclude  that the SkL forms progressively in domains which are hundreds of nanometers in size. In this seminar I will discuss the fundamentals of magnetic skyrmion lattices, motivate why SANS is an excellent technique to study skyrmions, and outline our recent findings in MnSi.…

Posted In: Condensed Matter Seminar

Fri Oct 23, 2020

Numbers Can Lie: When algorithms work perfectly but fail miserably

12:00 PM - 1:00 PM
Online

The famous saying, “numbers don’t lie,” might work when reporting the score of a football game, but even then, the numbers don’t tell the whole story. 

Algorithms developed by data scientists have implications for not only who may obtain a fair loan, but with who stays in prison and who’s released, and who will be favored by machine learning “decisions.” With so many parts of our lives decided by Big Data, how do scientists balance the algorithms and the ethics?…

Posted In: Special Lectures and Events

Mon Oct 26, 2020

Nuclear Physics Seminar: Dr. Joachim Goerres, University of Notre Dame

4:20 PM - 5:20 PM
zoom

Neutron transfer and neutron capture on the example of 25Mg(d,p) and 25Mg(n,g)

Dr. Joachim Goerres
Department of Physics, University of Notre Dame

Radiative neutron capture reactions play an important role in nuclear astrophysics. In some cases direct neutron capture reaction studies are not possible and neutron transfer reactions have been suggested as a

Posted In: Nuclear Seminar

Tue Oct 27, 2020

Astrophysics Seminar: Michelle Berg, University of Notre Dame

12:45 PM - 1:45 PM
zoom

Title TBA

Michelle Berg
Physics Graduate Student
University of Notre Dame…

Posted In: Astrophysics Seminar

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