Session Overview |
Light-matter Interactions at the quantum limit: atoms, molecules and photons - Bloc 2Room: International 2 |
Date: Tuesday, June 05 |
13:15 |
Towards a solid-state optical atomic clock
Main Author: Amar Vutha Organization: University of Toronto, Canada The extreme precision available from optical atomic clocks opens up new kinds of experiments in fundamental physics, such as sensitive searches for dark matter and dark energy. To further improve the precision of optical clocks, we are investigating the use of solid-state systems for optical atomic clocks. I will present our progress towards developing a clock based on impurity ions doped into a crystal. |
13:40 |
Diamond optomechanics for pulse storage and wavelength conversion
Main Author: Paul Barclay Organization: University of Calgary, Canada Diamond optomechanical devices couple optical and mechanical resonances, and host colour centres whose electronic and nuclear spins are excellent qubits. Diamond also supports high field intensities without suffering from two photon absorption, allowing the realization of large optical forces that mediate coherent optomechanical interactions. Here we take advantage of this to demonstrate several microsecond storage of optical pulses in the mechanical motion of a diamond device. We show that the maximum storage time is optically tunable, and that the pulse can be read out on a second wavelength detuned by over 40 nm from the input wavelength, resulting in a wideband optical translation device. |
14:05 |
High-resolution microscopy for single atoms in an optical cavity
Main Author: Mahmood Sabooni Organization: Institute for Quantum Computing, Canada Strong atom-light interaction in the setting of cavity QED manifests themselves as quantum resources for critical capabilities in quantum information science. By extension, collective effects in an ensemble of atoms mitigate their applicability to quantum nonlinear optics and quantum many-body physics beyond mean field theories. In our research group, we are pursuing an approach of introducing Rydberg excitations into a regularized array of atoms in an ultra-high-finesse optical cavity. One element that is required for this vision is the capability to resolve and identify Rydberg excitations, as well as to perform real-time arrangement of atoms into a low-entropy state. We discuss how to do the trapping and manipulation of single neutral atoms in reconfigurable arrays of optical traps with micrometer resolution. This method is based on employing a Texas Instruments Digital Micro-Mirror Device (DMD) as a holographic amplitude modulator with about 20 kHz update rate. We discuss the limitations of the technique and the scope for technical improvements. |
14:20 |
Quantum Trajectory Theory of Cavity-QED Systems with Coherent Optical Feedback
Main Author: Gavin Crowder Organization: Queen's University, Canada The addition of coherent feedback loops to quantum systems causes a complex memory of the system dynamics, which can offer new insights and degrees of control of quantum light-matter interactions. To investigate the non-Markovian dynamics of these systems, a new stochastic quantum trajectory formalism is employed to explore coherent feedback in nonlinear cavity-QED systems. |
14:35 |
Quantum Illumination on a noisy background
Main Author: Duncan England Organization: National Research Council of Canada, Canada We investigate quantum illumination in a laboratory environment using photon pairs produced by spontaneous four-wave mixing. One photon in each pair is measured locally while the other is sent to a target. Non-classical timing correlations between the two photons are used to achieve improved sensitivity compared to a coherent state of the same intensity. |
14:50 |
Interaction-Free Ghost Imaging
Main Author: Yingwen Zhang Organization: University of Ottawa, Canada By combining the ideas of interaction-free measurements and ghost imaging we demonstrate "interaction-free ghost imaging". This new technique can produce images with a visibility comparable to conventional ghost imaging but at the same time significantly reduces the amount of irradiation on the object making it an ideal technique to observe light sensitive materials. It also possess the capability to detect phase and polarisation changes in the photon introduced by the probed object which is otherwise invisible to conventional ghost imaging. |