Bulletin of the American Physical Society
2011 Annual Meeting of the Four Corners Section of the APS
Volume 56, Number 11
Friday–Saturday, October 21–22, 2011; Tuscon, Arizona
Session B1: Plenary Session II |
Hide Abstracts |
Chair: John Cumalat, University of Colorado, Boulder Room: UA Student Union South Ballroom |
Friday, October 21, 2011 10:50AM - 11:26AM |
B1.00001: Electric readout and storage concepts for electron and nuclear spin states in silicon Invited Speaker: A variety of concepts utilizing spins in semiconductors for information storage and processing have been proposed in recent years. One of these concepts [1] uses the phosphorous nucleus in crystalline silicon as a quantum bit, an approach which combines longest known spin coherence times and, therefore, spin storage times, with already existing, well developed and highly reliable, crystalline silicon nano-technology. Our research is focused on implementations of electric readout devices for electron- and nuclear-spins in silicon. I will review different experiments which show how donor electrons [2-4] and nuclear [5] spins of phosphorous atoms in crystalline silicon can be used as a electrically readable spin memories with long storage times for classical and quantum information and how nuclear spin qubits can be initialized [6].\\[4pt] [1] B. E. Kane, Nature 393, 133 (1998).\\[0pt] [2] A. R. Stegner, C. Boehme, H. Huebl, M. Stutzmann, K. Lips, M. S. Brandt, Nature Physics 2, 835 (2006). \\[0pt] [3] S.-Y. Paik, S.-Y. Lee, W. J. Baker, D. R. McCamey, and C. Boehme, Phys. Rev. B 81, 075214 (2010).\\[0pt] [4] G. W. Morley, D. R. McCamey, H. A. Seipel, L.-C. Brunel, J. van Tol, C. Boehme, Phys. Rev. Lett. 101, 207602 (2008).\\[0pt] [5] D. R. McCamey, J. van Tol, G. W. Morley, C. Boehme, Science 330, 1652 (2010).\\[0pt] [6] D. R. McCamey, J. van Tol, G. W. Morley, C. Boehme, Phys. Rev. Lett. 102, 027601 (2009). [Preview Abstract] |
Friday, October 21, 2011 11:26AM - 12:02PM |
B1.00002: Ultrafast X-ray Diffraction at the LCLS Invited Speaker: The recent commissioning of the Linac Coherent Light Source (LCLS), the first hard X-ray femtosecond laser, opens up new and exciting opportunities for biological structure determination. It has been proposed that femtosecond X-ray pulses can be used to outrun damage processes by using single pulses so brief that they terminate before the manifestation of damage to the sample. X-ray crystallography provides so far the vast majority of macromolecular structures, but the success of the method relies on growing crystals of sufficient size. The high intensity femtosecond X-ray pulses generated at the LCLS allow using nanocrystals or even single particles for biological structure determination. During the first biological imaging beamtimes at the LCLS we have collected millions of snapshot diffraction patterns from membrane protein nanocrystals and single virus particles. New methods for injecting biomolecules/nanocrystals into the X-ray beam as well as new data analysis algorithms had to be developed. I will describe these experiments and their challenges.\footnote{Chapman, H.N., et al., Femtosecond X-ray protein nanocrystallography. Nature, 2011. \textbf{470} (7332): p. 73-U81.}$^,$\footnote{Seibert, M.M., et al., Single mimivirus particles intercepted and imaged with an X-ray laser. Nature, 2011. \textbf{470} (7332): p. 78-U86.} [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700