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Quantum Optics
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Photon-Pair Sources
Prof. Govind Agrawal
Entangled photon pairs are essential for a number of
applications related to quantum cryptography, quantum
computing, and quantum communications. Prof. Agrawal's
group is employing four-wave mixing inside optical fibers
for creating photon pairs that are correlated in a quantum
sense and thus can be used to create a source
of entangled photon pairs much brighter than
possible with other conventional techniques.
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Laser Cooling and
Trapping of Atoms
Prof.
Nick Bigelow 
His recent research has focussed on the creation and
study of ultra-cold quantum gasses, the manipulation
and control of atomic motion using light pressure forces,
the laser cooling and trapping of atoms
and molecules, Bose-Einstein Condensation and the basic
quantum nature of the basic atom-photon interaction.
The Cooling and Trapping (CAT) Laboratory of Prof. Bigelow
is leading a world-wide race for multispecies BEC in
a single trap, and is carrying out experimental and
theoretical studies of molecular interactions at low
temperatures.
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Quantum Imaging
Prof.
Robert Boyd
Dr. Boyd is interested in the study of quantum states
of light, especially in the context of quantum imaging.
This research is motivated toward the development of
laboratory techniques to generate multimode squeezed
and entangled states of light and the use of these quantum
states of light in the development of imaging systems
with enhanced imaging characteristics. Prof. Boyd is
also interested in the use of quantum interference effects
such as electromagnetically induced transparency to
develop new nonlinear optical devices. His group is
determining the utility of using third-order nonlinear
optical interactions for this purpose. Such interactions
hold particular promise for quantum imaging for reasons
including the fact that they can produce quantum states
of light without producing a large wavelength shift
on the generated beam.
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Quantum Coherence, Dark
States, Entaglement
Prof.
Joseph Eberly
Prof. Eberly's research interests are in the general field
of Theoretical Quantum Optics and AMO science. Recent
results from his group include calculations of single-photon
wave functions localized in free space that exhibit the
binding effects of quantum memory, an examination of cross-talk
in qubit chains, and the derivation of a novel "dark
area" theorem that governs nonlocal effects in coupled
optical pulses. Themes of interest include quantum information
and the dynamics of entanglement in continuous Hilbert
spaces, coherent quantum control via counter-intuitive
dark-state interactions, cavity QED, soliton and adiabaton
propagation, and non-sequential double ionization of atoms
exposed to high intensity radiation.
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Quantum Optics in the
Near-Field
Prof.
Lukas Novotny
The group is interested in understanding how virtual photons
are involved in nanoscale interactions (van der Waals,
Casimir, electromagnetic friction). This includes understanding
the interaction of a quantum dot with an optical near-field.
The tip enhancement technique produces an electric field
with sufficiently strong gradients that allow the excitation
of higher order transitions such as magnetic dipole or
electric quadrupole transitions.
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Electron Wave Packets,
Entanglement
Prof.
Carlos Stroud
Professor Stroud's current projects include the study
of Rydberg atomic electron wave packets, multilevel quantum
logic, generation of quantum states of light via electromagnetically
induced transparency, and entanglement and teleportation
of macroscopic states of matter.
The group considers coherent control of the shape of an
atomic electron's wavefunction using a train of short
transform-limited laser pulses. This type of control is
experimentally demonstrated by exciting with a train of
three pulses and measuring the resulting quantum state
distribution. We also present a general theory for control
with a train of N pulses in the weak field limit and discuss
the extension of this theory to the strong field limit.
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©2007 University of Rochester
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