News: Research Highlights

Tue January 1, 2008

Time-Resolved Observation and control of Superexchange Interactions with Ultracold Atoms in Optical Lattices

S. Trotzky, P. Cheinet, S. Foelling, M. Feld, U. Schnorrberger, A. M. Rey, A. Polkovnikov, E. Demler, M. D. Lukin, and I. Bloch, Time-Resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices, Science 319, 295-299 (2008).
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Research Highlights
Tue January 1, 2008

Optical Bistability at Low Light Level due to Collective Atomic Recoil

M. Vengalattore, M. Hafezi, M. D. Lukin, and M. G. Prentiss, Optical Bistability at Low Light Level due to Collective Atomic Recoil, Phys. Rev. Lett. 101, 063901 (2008).
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Research Highlights
Tue January 1, 2008

When you can?t find a partner on a dance floor

Pairing of electrons can dramatically change the properties of materials.  When electrons flow in a normal conductor, they feel friction, which causes resistance and heating. At very low temperature, however, electrons can form pairs and flow without friction, forming a superconductor.  Superconductivity is very similar to superfluidity, but involves charged particles. Pairing of unequal partners, in the case above of electrons with spin up and spin down, is the essence of the transition to a superfluid state.  At high temperature, the pairs break up and superfluidity is lost.

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Research Highlights
Tue January 1, 2008

Anyonic Interferometry and Protected Pemories in Atomic Spin Lattices

L. Jiang, G. Brennan, A. Gorshkov, K. Hammerer, M. Hafezi, E. Demler, M. D. Lukin, and P. Zoller, Anyonic Interferometry and Protected Pemories in Atomic Spin Lattices, Nature Physics 4, 482-488 (2008).
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Research Highlights
Tue January 1, 2008

Quantum Many-Body Dynamics of Coupled Double-Well Superlattices

P. Barmettler, A. M. Rey, E. Demler, M. D. Lukin, I. Bloch, and V. Gritsev, Quantum Many-Body Dynamics of Coupled Double-Well Superlattices, Phys. Rev. A 78, 012330 (2008).
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Research Highlights
Tue January 1, 2008

Coherence of an optically illuminated single nuclear spin qubit

L. Jiang, G. Dutt, E. Togan, L. Childress, P. Cappellaro, J. M. Taylor, and M. D. Lukin, Coherence of an optically illuminated single nuclear spin qubit, Phys. Rev. Lett. 100, 073001 (2008).
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Research Highlights
Tue January 1, 2008

Crystallization of Strongly Interacting Photons in a Nonlinear Optical Fibre

D. E. Chang, V. Gritsev, G. Morigi, V. Vuletic, M. D. Lukin, and E. Demler, Crystallization of Strongly Interacting Photons in a Nonlinear Optical Fibre, Nature Physics 4, 884-889 (2008).
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Research Highlights
Tue January 1, 2008

Theoretical Program

We have extended our studies of collisional processes in gases at ultracold and cold temperatures in researches that are responsive to experiments. We have calculated the 2Sg+ and  2Su+ potential curves of the molecular ion Yb2+ and we have obtained the cross-sections for charge exchange of its several isotopes of Yb 2 + in the parent...
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Research Highlights
Tue January 1, 2008

Determination of the equation of state of a polarized Fermi gas at unitarity

Y. Shin, Determination of the equation of state of a polarized Fermi gas at unitarity, Phys. Rev. A 77, 041603 (2008).
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Research Highlights
Tue January 1, 2008

Co-trapping of Cold NH Molecules with N Atoms

A frontier in physics with cold polar molecules is the study of paths toward collisional cooling. Here we co-trap an very low polarizability atom along with a very “atom-like” polar molecule. Earlier work with He colliding with NH found that the inelastic processes were highly suppressed due to the small of the NH ground state...
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News type:
Research Highlights