News: Research Highlights

260 articles

Thu, January 1, 2009

Universal resource state for One-Way Quantum Computations

A fascinating model for quantum computing, other than the traditional quantum circuit model, is the “one-way” model that is based on simply doing single qubit measurements to a fixed, initial entangled quantum state of many qubits. By feeding back measurement results to control the axis of subsequent measurements, any quantum circuit can be simulated and...

News type: Research Highlights

Thu, January 1, 2009

Mechanism of Collisional Spin Relaxation in 3S Molecules

Wesley Campbell, Timur Rscherbul, Hsin-I Lu, Edem Tsikata, Roman Krems, John Doyle, Physical Review Letters 102 013003 (2009)

News type: Research Highlights

Thu, January 1, 2009

Hybrid 2D surface trap for quantum simulation

J. I. Gillen, W. S. Bakr, A. Peng, P. Unterwaditzer, S. Foelling, M. Greiner, Hybrid 2D surface trap for quantum simulation, arXiv:0812.363v1 (2008)

News type: Research Highlights

Thu, January 1, 2009

Realization of high selectivity ion qubit addressing scheme

Selectively addressing individual qubits in an array of ions is a vital task for scalable quantum computation with trapped ions. Traditionally, this is accomplished using complex optics for laser beam steering, but such schemes are not easily scalable. We have realized a scalable alternative which employs the advantages of microfabrication and cryogenic operation, and applies...

News type: Research Highlights

Thu, January 1, 2009

Cold Trapped Molecules: Collisional Limitations and Mechanisms

Wesley Campbell, Timur Rscherbul, Hsin-I Lu, Edem Tsikata, Roman Krems, John Doyle, Physical Review Letters 102 013003 (2009)

News type: Research Highlights

Thu, January 1, 2009

Near Field Electrical Detection of Optical Plasmons and Single Plasmon Sources

A. Falk, F. L. Koppens, C. L. Yu, K. Kang, N. d. L. Snapp, A. V. Akimov, M. Jo, M. D. Lukin, and H. Park, Near Field Electrical Detection of Optical Plasmons and Single Plasmon Sources, Nature Physics 5, 475-479 doi:10.1038/nphys1284 (2009).

News type: Research Highlights

Thu, January 1, 2009

Observartion of itinerant ferromagnetism in a strongly interacting Fermi gas of ultracold atoms

Ferromagnetism of delocalized (itinerant) fermions occurs due to repulsive interactions and the exchange energy which reduces the interaction energy for spin polarized domains due to the Pauli exclusion principle. At a critical interaction, given by the so-called Stoner criterion [1], they system spontaneously develops domains and becomes ferromagnetic. This, together with a suitable band structure...

News type: Research Highlights

Thu, January 1, 2009

Buffer-gas Cooled Bose-Einstein Condensate

Now well into its second decade, the experimental realization of Bose-Einstein condensation (BEC) in dilute gases has led to revolutionary advances in physics. Since this achievement the field has moved quickly, with innumerable new developments in coherent atom and molecular optics and nonlinear atom optics, the observation of superfluidity in atomic gases, the study of novel quantum systems, and most recently the study of the BEC-BCS crossover. Despite the breadth of new research, however, the basic recipe for BEC is unchanged from its first realization in alkali atoms: pre-cool a hot sample utilizing laser cooling to permit trapping and provide high densities, followed by evaporative cooling to reach quantum degeneracy.

News type: Research Highlights

Thu, January 1, 2009

A quantum gas microscope for detecting single atoms in a Hubbard-regime optical lattice

For the first time it was possible to observe single atoms in an optical lattice, where particles can tunnel from site to site. An optical lattice is a crystals made of light that can be used to trap atoms at very low temperatures, creating a test bed for fundamental properties of crystalline materials. This research is part of a program on studying novel quantum matter using ultracold quantum gases. The work is led by Markus Greiner, Assistant Professor of Physics, principal investigator at Harvard and member at the NSF funded Harvard-MIT Center for Ultracold Atoms.

News type: Research Highlights

Thu, January 1, 2009

Demonstration of resolved sideband cavity cooling of a single ion

This is joint work with Vladan Vuletic.

News type: Research Highlights