Realistic quantum-enhanced interferometry

Date: 
July 28, 2009 (All day)
Speaker: 
Dr. Konrad Banaszek

It is widely recognized that the use of nonclassical states of light allows one to overcome the shot-noise limit in precision measurements. The enhancement comes from exploiting inherently quantum features, such as entanglement, that are sensitive to decoherence. The outstanding challenge is to design quantum-enhanced measurement schemes that remain robust in realistic environments. We review our recent work in this direction for optical interferometry.

Ultrafast vibrational spectroscopy of photochemistry and anharmonic coupling

Date: 
April 13, 2009 (All day)
Speaker: 
Dr. David McCamant

Research in the McCamant lab focuses on ultrafast nuclear dynamics in photochemistry and photobiology, with the hope that we can illuminate how excited-state structure and vibrational energy flow are related to photochemical function. Our work is conducted talong two integrated themes: (1) ultrafast electronic and vibrational studies of photochemical reaction dynamics of DNA and (2) development of new spectroscopic techniques to study vibrational coupling.

Single Spins in Diamond for Quantum Networks and Magnetic Sensing

Date: 
March 9, 2009 (All day)
Speaker: 
Gurudev Dutt

I will discuss experiments that demonstrate addressing, preparation, and coherent control of coupled electronic and nuclear spin qubits in the diamond lattice at room temperature [1,2]. 

Optimal quantum memory with atomic ensembles

Date: 
February 23, 2009 (All day)
Speaker: 
Dr. Irina Novikova

Efficient and reliable quantum communication will require the control of individual photons. As a step toward this objective, wehave demonstrated promising techniques that involve using a dynamic form of electromagnetically induced transparency to optimally and
reversibly map arbitrary pulses of light onto an ensemble of warm Rubidium atoms. Our techniques, demonstrated in atomic vapor, are
applicable to a wide range of systems and protocols.

Imaging spin injection and transport in semiconductor 'spintronic" devices

Date: 
February 2, 2009 (All day)
Speaker: 
Dr.Scott Crooker

Three essential elements of a semiconductor spin transport device are i) an efficient mechanism for electrically injecting spin-polarized electrons into a semiconductor, ii) a practical means for spinmanipulation and transport, and iii) a simple electronic scheme for detecting the resulting spin polarization. This talk will address each of these three elements in turn using data from low-temperature, magneto-optical scanning Kerr microscopy studies.

Interaction of Strong Single-Cycle Terahertz Pulses with Semiconductor

Date: 
November 3, 2008 (All day)
Speaker: 
Dr. Yun-Shik Lee

Generation of non-classical light with tailored properties

Date: 
April 18, 2011 -
4:00pm to 5:00pm
Speaker: 
Alfred U'Ren
Speaker's Institution: 
Universidad Nacional de México

In this talk we will cover recent work from our group on the generation of non-classical light, including photon pairs and triplets, through spontaneous nonlinear parametric processes.  We will discuss specific techniques based on  spontaneous parametric downconversion in nonlinear crystals , as well as on spontaneous four wave mixing in optical fibers for the generation of photon pairs with tailored entanglement properties.   We will also discuss a recent proposal based on third-order spontaneous parametric downconversion in optical fibers for the generation of photon triplets. 

Optical Society Announces New Student Chapter at University of Oregon

Decoherence of polarization entanglement in optical fibers with polarization mode dispersion

Date: 
March 14, 2011 -
4:00pm to 5:00pm
Speaker: 
Misha Brodsky
Speaker's Institution: 
AT&T Labs

Quantum mechanics permits the existence of unique correlations, or entanglement, between individual particles. The ability of entangled particles to act in concert is preserved even when they are separated by large distances and serves as a resource for numerous applications. For example, distributing entangled photon pairs over fiber-optic cables enables secure communication between two remote parties or could offer the possibility of interconnecting quantum computers.

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