Michael N. Leuenberger, Ph.D. Assistant Professor Department of Physics Phone: 407-882-2846 Fax: 407-882-2819 12424 Research Parkway Suite 428 Orlando, FL 32826 E-mail: mleuenbe@mail.ucf.edu

Education

• Postdoctoral, 8/2004--7/2005
  University of California, San Diego
• Postdoctoral, 11/2002--7/2004
  University of Iowa, Iowa City
• Postdoctoral, 5/2002--10/2002
  University of Basel, Switzerland
• Ph.D. in theoretical physics
  University of Basel, Switzerland
• M.S./B.Sc. in theoretical physics
  University of Basel, Switzerland

Group Members

Postdocs: Mikhail Erementchouk, Volodymyr Turkowski
PhD students: Gabriel Gonzalez, Hubert Seigneur, Sergio Tafur, Ahmed El Halawani

Research

• quantum information: quantum computing, quantum teleportation, and quantum error correction
• quantum mechanics: quantum entanglement and measurement theory
• quantum electrodynamics
• spintronics and opto-spintronics
• nonlinear optical phenomena
• semiconductor physics: quantum dots and quantum wells
• molecular magnets
• quantum many-body physics

	Quantum Information Science Quantum Information Science can be utilized to improve the security of satellite communication. Dr. Michael Leuenberger is currently exploring this possibility from both a theoretical and an experimental perspective. This approach has the potential of providing unconditionally secure quantum communication between land-based stations and satellites.
	Quantum Teleportation The current focus of our studies is in the transfer of quantum information from one quantum dot to another one, distant from the first one, by means of the conditional single-photon Faraday rotation.

Current Funding

• DARPA Young Faculty Award: High-temperature electrically driven Mbps single-photon source at telecom wavelengths,
  PI: Leuenberger, 8/2008-2/2010

• UCF Office of Research: Numerical Renormalization Group Techniques
  PI: Leuenberger,  5/2007 - 4/2008

• NSF: Modeling of a Photonic Crystal Hosting a Quantum Network Made of Single Spins in Quantum Dots that Interact via Single Photons
  PI: Leuenberger,  9/2007 - 8/2010

Courses

• Fall semester 2007:
  PHY4604: Wave Mechanics I, Dept. of Physics, University of Central Florida, USA.

• Spring semester 2008:
  PHY4605: Wave Mechanics II, Dept. of Physics, University of Central Florida, USA.

Selected Publications

Gabriel Gonzalez, Michael N. Leuenberger, Eduardo R. Mucciolo, Kondo effect in single-molecule magnet transistors, Phys. Rev. B 78, 054445 (2008).

Mikhail Erementchouk, Michael N. Leuenberger, Rabi oscillations in semiconductor multi-wave mixing response, Phys. Rev. B 78, 075206 (2008).

H. P. Seigneur, Michael N. Leuenberger, Winston V. Schoenfeld, Single photon Mach-Zehnder interferometer for quantum networks based on the Single Photon Faraday Effect, J. Appl. Phys. 104, 014307 (2008).

Mikhail Erementchouk, Michael N. Leuenberger, Lu J. Sham Many-body interaction in semiconductors probed with 2D Fourier spectroscopy, Phys. Rev. B 76, 115307 (2007).

Gabriel Gonzalez, Michael N. Leuenberger Berry-phase blockade in single-molecule magnets, Phys. Rev. Lett. 98, 256804 (2007).

Michael N. Leuenberger, Eduardo R. Mucciolo Berry-Phase Oscillations of the Kondo Effect in Single-Molecule Magnets, Phys. Rev. Lett. 97, 126601 (2006).

Michael N. Leuenberger, Fault-tolerant quantum computing with spins using the conditional Faraday rotation, Phys. Rev. B 73, 075312 (2006); see cond-mat/0412114.

Michael N. Leuenberger, Lu J. Sham, Theory of Umklapp-assisted recombination of bound excitons in Si:P, cond-mat/0507383.

Ralph Schenker, Michael N. Leuenberger, Gregory Chaboussant, Daniel Loss, Hans U. GŸdel, Phonon Bottleneck Effect Leads to Observation of Quantum Tunneling of the Magnetization and Butterfly Hysteresis Loops in (Et4N)3Fe2F9, Phys. Rev. B 72, 184403 (2005).

Michael N. Leuenberger, The generalized rotating frame, J. Mag. Mag. Mat. 272-276, 1974-1975 (2004).

Michael N. Leuenberger, Michael E. Flatte, D. D. Awschalom, Teleportation of electronic many-qubit states via single photons, Phys. Rev. Lett. 94, 107401 (2005); see cond-mat/0407499.

Michael N. Leuenberger, Michael E. Flatte, D. D. Awschalom, Measuring the entanglement of coupled spins by multiphoton interference, Europhys. Lett. 71, 387-393 (2005), see cond-mat/0307657.

Michael N. Leuenberger, Daniel Loss, The Grover algorithm with large nuclear spins in semiconductors, Phys. Rev. B 68, 165317 (2003), see cond-mat/0304674.

Michael N. Leuenberger, Daniel Loss, Michael E. Flatte, D. D. Awschalom, Discrete Fourier Transform in Nanostructures using Scattering, Michael N. Leuenberger, Daniel Loss, Michael E. Flatte, D. D. Awschalom, J. Appl. Phys. 95, 8167 (2004).

Michael N. Leuenberger, Florian Meier, Daniel Loss, Quantum Spin Dynamics in Molecular Magnets, Monatshefte fŸr Chemie 134, 217 (2003), see cond-mat/0205457.

Ralph Schenker, Michael N. Leuenberger, Gregory Chaboussant, Hans U. Guedel, Daniel Loss, Butterfly Hysteresis and Slow Relaxation of the Magnetization in (Et4N)3Fe2F9: Manifestations of a Single-Molecule Magnet, Chem. Phys. Lett. 358, 413-418 (2002), see cond-mat/0204445.

Michael N. Leuenberger, Daniel Loss, Martino Poggio, David D. Awschalom, Quantum information processing with large nuclear spins in GaAs semiconductors, Phys. Rev. Lett. 89, 207601 (2002), see cond-mat/0204355.

Michael N. Leuenberger and Daniel Loss, Quantum Computing in Molecular Magnets, Nature 410, 789-793 (2001), see cond-mat/0011415.

Michael N. Leuenberger and Daniel Loss, Spintronics and Quantum Computing: Switching Mechanisms for Qubits, Physica E 10, 452-457 (2001), see cond-mat/0010434.

Michael N. Leuenberger and Daniel Loss., Spin tunneling and topological selection rules for integer spins, Phys. Rev. B 63, 054414 (2001), see cond-mat/0006075.

Michael N. Leuenberger and Daniel Loss., Incoherent Zener tunneling and its application to molecular magnets, Phys. Rev. B 61, 12200-12203 (2000), see cond-mat/9911065.

Michael N. Leuenberger and Daniel Loss., Reply to the comment of Chudnovsky&Garanin on "Spin relaxation in Mn12-acetate", Europhys. Lett. 52 (2), 247-248 (2000), see cond-mat/0006149.

Michael N. Leuenberger and Daniel Loss., Spin tunneling and phonon-assisted relaxation in Mn12-acetate, Phys. Rev. B 61, 1286-1302 (2000), see cond-mat/9907154.

Michael N. Leuenberger and Daniel Loss., Spin relaxation in Mn12-acetate, Europhys. Lett. 46 (5), 692-698 (1999), see cond-mat/9810156.

Awards, Honors and Societies

• Member of the American Physical Society
• Member of the Florida Academy of Sciences