Sun, January 1, 2012

Quantum nonlinear optics with single photons enabled by strongly interacting atoms

We have realized a quantum nonlinear medium that transmits one, but absorbs two photons. This is accomplished by coupling slowly traveling photons in an atomic gas to highly excited, strongly interacting Rydberg states. This result opens not only possibilities for single-photon sources, but may also enable deterministic quantum gates between photons.

Sat, January 1, 2011

Quantum simulation of antiferromagnetic spin chains in an optical lattice

Sat, January 1, 2011

Spin gradient demagnetization cooling of ultracold atoms

We have demonstrated a new cooling method in which a time-varying magnetic field gradient is applied to an ultracold spin mixture [1].  We prepare a two-component cloud of rubidium atoms, either in the superfluid or Mott insulator phase, in a strong field gradient separating the two components with a narrow mixed region between the pure-spin...

Sat, January 1, 2011

Quantum computing with light

Quantum computing with light

Sat, January 1, 2011

Speckle Imaging of Spin Fluctuations in a Strongly Interacting Fermi Gas

Spin fluctuations and density fluctuations are studied for a two-component gas of strongly interacting fermions along the BEC-BCS crossover [1].  Spin fluctuations are observed by directly measuring the difference in densities for the two spin states.  This was done by using a probe laser which had equal detuning from both states, but with opposite signs.

Sat, January 1, 2011

Interaction?induced orbital excitation blockade of ultracold atoms in an optical lattice arXiv:1105.5834v1. In press. [cond-mat.quant-gas]

Sat, January 1, 2011

Laser Cooling and Real-Time Projective Measurement of Nuclear Spin Environment Using a Solid-State Qubit, Nature, 478 497-501 (2011).

Sat, January 1, 2011

Optomechanical transducers for quantum information processing

Sat, January 1, 2011

Tunable Superfluidity and Quantum Magnetism with Ultracold Polar Molecules

Sat, January 1, 2011

Quantum Magnetism with Polar Alkali-Metal Dimers