Chinese Version¢xback

Professor
Yu, Ite Albert

 
Personal Website
Office¡G886-3-5742539 (PHYS R513)
Laboratory¡GUltracold Atom Laboratoryb
Lab Tel¡G886-3-5742540 (PHYS R012)
Fax¡G886-3-5723052
E-mail¡Gyu@phys.nthu.edu.tw

Education
  1. 1987-1993 Ph.D in Physics, Massachusetts Institute of Technology, U.S.A.
  2. 1980-1984 B.S. in Physics, National Tsing Hua University, R.O.C.
Professional Experience
Current position¡G
  1. 2005-present, Professor of Physics, Tsing Hua University, R.O.C.
Experience¡G
  1. 1995-2005, Associate Professor of Physics, Tsing Hua University, R.O.C.
  2. 1993-1995, Postdoctral Researcher of Harvard-Smithsonian Center for Astrophysics,U.S.A.
Research Fields
    1. Experiments and Theories of Atomic and Molecular Physics
    2. Laser Trapping and Cooling
    3. Bose-Einstein Condensation
    4. Quantum Optics
    5. Quantum Information
Research Interests and achievement
Updated on September 3, 2006
Our research interests include the experiments and theories of quantum optics, quantum information, and Bose-Einstein condensation (BEC). We utilize laser-cooled atoms for the studies of the quantum interference phenomena, the electromagnetically induced transparency (EIT) effect, slow light, and the storage of light pulses.

There are three major progresses in the recent two years. (1) We have proposed and experimentally demonstrated a new scheme of low-light-level cross-phase modulation (XPM) based on the light-storage technique. The new scheme enhances the flexibility of the experiment and makes possible conditional phase shifts of the order of Ĉ with single photons. One can utilize the single-photon XPM in the applications of quantum nondemolition measurements, quantum phase gates, and the manipulation of quantum information. See for PRL96, 043603 details. (2) We have experimentally demonstrated the all-optical switching in which a single-photon pulse switched by another is feasible. This light-storage all-optical switching can be a very useful tool in the manipulation of quantum information. See OL31, 2350 and OL30, 3207 for details. (3) We have reported the first demonstration of maniplating the retrieved width, frequency, and polarization of stored light pulses. This method can bridge different quantum devices, each of which only interacts with light of specific properties. See OL31, 3511, PRA72, 053803, and PRA72, 033812 for details.

More recently, we have successfully produced Bose condensate of 87Rb atoms. The transition temperature is around 500 nK at a density of above 1013 cm-3. There are 20~50 thousand atoms in the pure Bose condensate with a lifetime of 5 s. Please visit our web site of http://atomcool.phys.nthu.edu.tw/ for details.
Selected Publications
  1. [2006] Y. F. Chen, C. Y. Wang, S. H. Wang, and I. A. Yu, Low-Light-Level Cross-Phase Modulation Based on Stored Light Pulses, Phys. Rev. Lett. 96, 043603 (2006).
  2. [2006] Y. F. Chen, P. C. Kuan, S. H. Wang, C. Y. Wang, and I. A. Yu, Manipulating the retrieved frequency and polarization of stored light pulses, Opt. Lett. 31, 3511 (2006).
  3. [2006] C. Y. Wang, Y. F. Chen, S. C. Lin, and I. A. Yu, Low-light-level all-optical switching, Opt. Lett. 31, 2350 (2006).
  4. [2006] Y. F. Chen, Y. M. Kao, W. H. Lin, and I. A. Yu, Phase variation and shape distortion of light pulses in EIT media, Phys. Rev. A 74, 063807 (2006).
  5. [2006] P. C. Guan, Y. F. Chen, and I. A. Yu, Role of degenerate Zeeman states in the storage and retrieval of light pulses, To be published in Phys. Rev. A.
  6. [2005] Y. F. Chen, Z. H. Tsai, Y. C. Liu, and I. A. Yu, Low-light-level photon switching by quantum interference, Opt. Lett. 30, 3207 (2005).
  7. [2005] Y. F. Chen, S. H. Wang, C. Y. Wang, and I. A. Yu, Manipulating the retrieved width of stored light pulses, Phys. Rev. A 72, 053803 (2005).
  8. [2005] Y. F. Chen, Y. C. Liu, Z. H. Tsai, S. H. Wang, and I. A. Yu, Beat-note interferometer for direct phase measurement of photonic information, Phys. Rev. A 72, 033812 (2005).
    • All Publications (Expansible)

Top¢xBack