Quantum physics

Professor Howard Carmichael completed a paper with Mile Gu and Scott Parkins on the topic of Mile's Masters thesis. The paper was published in Physical Review A. He completed work with PhD student Felipe Dimer de Oliviera and Scott Parkins on the thermodynamic limit of the Dicke phase transition model proposed earlier by Parkins. A paper on the topic is accepted and to be published in Physical Review A.

Professor Carmichael developed with postdoc Levente Horvath, a fully quantized treatment (including quantized c-of-m motion) of the heating of a trapped ion in a standing-wave laser field. The project is an outgrowth of the MSc research of Rob Fisher. Results of the study were presented at 2 international meetings and 3 research seminars in the United States.

Professor Carmichael initiated work on photon correlations in two-mode cavity QED with visitor Hichem Eleuch. He continued the work with MSc student Matthias Kronenwett and Scott Parkins. A treatment of the problem including all 16 atomic states of an F=3 to F=4 transition (as in current experiments) was developed.

Professor Carmichael completed work with PhD student Changsuk Noh on our operator-based approach to the continuous variable teleportation of quantum fields. He applied the method to the teleportation of resonance fluorescence. Results were presented at 2 international meetings.

Professor Carmichael continued work with PhD student Felipe Dimer de Oliviera on the phase-space treatment of the Dicke- model phase transition. A previously identified fundamental problem with the Haken approach was understood and resolved. Approaches based on the Holstein-Primakov and atomic coherent states representations were developed and compared with Heisenberg picture calculations for the thermodynamic limit.

Professor Carmichael continued work with MSc student Malkhaz Meladze and Matthew Collett on the Dicke quantum phase transition with an external electric field. he initiated work with MSc student Simon Thwaite and Matthew Collett on the quantum dynamics of a trapped ion in the absence of spontaneous emission. A full analytical solution to the problem in the Lamb-Dicke regime was developed.

Professor Carmichael completed work on the research monograph 'Statistical Methods in Quantum Optics 2: Non-Classical Fields'. The book will be published by Springer in 2007. Contributed to the preparation of the CoRE proposal for the 'Jack Dodd and Dan Walls Centre for Photonics and Ultra-Cold Atoms'.

For more information on the research area above, please contact:

Professor Howard Carmichael
Phone: +64 9 373 7599 ext 88899
Email: h.carmichael@auckland.ac.nz

Or visit the profile of Professor Howard Carmichael.
 

Many new calculations were performed during sabbatical leave at the California Institute of Technology (Caltech) for a research project on quantum phase transitions in optical cavity QED systems, which form the core of an article which in the international physics journal Physical Review. Work on related systems is continuing with graduate students in Auckland and researchers from the University of Innsbruck. Collaborative projects with physicists at Caltech lead to publications in Nature and Physical Review A. Work is continuing on extensions of these projects.

For more information on the research area above, please contact:

Associate Professor Scott Parkins
Phone: +64 9 373 7599 ext 86282
Email: s.parkins@auckland.ac.nz

Or visit the profile of Associate Professor Scott Parkins.