Double resonance of Raman transitions in a degenerate Fermi gas

We measure momentum-resolved Raman spectra of a spin-polarized degenerate Fermi gas of $^{173}$Yb atoms for a wide range of magnetic fields, where the atoms are irradiated by a pair of counterpropagating Raman laser beams as in the conventional spin-orbit coupling scheme. Double resonance of first- and second-order Raman transitions occurs at a certain magnetic field and the spectrum exhibits a doublet splitting for high laser intensities. The measured spectral splitting is quantitatively accounted for by the Autler-Townes effect. We show that our measurement results are consistent with the spinful band structure of a Fermi gas in the spatially oscillating effective magnetic field generated by the Raman laser fields.Comment: 7 pages, 6 figure

Why do University Students Enroll in Physical Activity Education Courses? Differential Affects of Required Versus Elective Institutional Policies

The aims of this study were to determine university students’ reasons for enrolling in physical activity courses (PACs) at institutions with different course policy arrangements, and to determine whether those reasons were associated with students’ motivation, competence, and weekly exercise METs. University students (N = 612) enrolled at two universities were recruited, one with a PAC requirement and one without. Participants completed questionnaires assessing their reasons for enrolling in PACs, motivation, competence, and weekly exercise METs. Reasons for enrolling differed by gender, with “to improve fitness associated with females and “to have fun” associated with males. Different types of motivation and physical activity levels were associated with female students’ reasons for enrolling in PACs depending on whether the institution had an elective or required PAC policy. Gender and an institution’s PAC policy appear to affect college and university students’ reasons for enrolling in PACs.Keywords: College/University Instructional Physical Activity Programs (C/UIPAP), exercise, higher education, graduation requirement, physical education, psycholog