Conveners
DAMOPC Poster Session | Session d'affiches DPAMPC (14)
- Paul Barclay (University of Calgary)
A unique detector which is selectively sensitive to low energy metastable atoms, is used to study the production of ground configuration N(2P) atoms following collisions of low energy (0-300 eV) electrons with molecular nitrogen. Time-of-flight detection has allowed identification of at least two dissociation channels with significant differences in released kinetic energy of the fragments....
Hollow-core photonic-crystal fibers (HCPCF) provide avenues to study light-matter interactions under tight transverse confinement of both atoms and photons. We implement a novel type of cavity by attaching a pair of photonic crystal (PC) slabs acting as high reflectivity dielectric metasurface mirrors onto the ends of a piece of a HCPCF. These mirrors, which can reflect perpendicularly...
This work focuses on two Ru-bearing molecules: RuF and RuCl. Both molecules were created in a molecular beam apparatus at UNB. Their spectra were detected by laser-induced fluorescence. In the low-resolution survey of RuF from 400 to 770 nm , five bands were detected in the blue, green and infrared regions of the electromagnetic spectrum. Four of them were rotationally analyzed from...
Modulating the phase of a light field with a single photon is a requirement for many applications related to quantum information processing. Here, we predict large phase shifts induced in a meter field by a probe field at single photon levels in an off-resonant three-level ladder scheme implemented with a laser-cooled ensemble of cesium atoms. The strong optical nonlinearity arises when both...
Squeezed states have recently attracted attention for use in quantum information as continuous variable entangled systems[1]. Such states can potentially be created in microring resonators and photonic crystal cavities. However, scattering leakage in these nanoscopic systems leads to loss, as it is an inherent feature of these devices. In this work, we show that the states created in lossy...
Entanglement distribution over long distances enables us to transfer information securely by means of quantum repeaters across quantum networks. Here we present a scheme for generating heralded entanglement between spatially separated single rare-earth ions doped into crystals. We propose to co-dope each crystal with a single Er ion and several Eu ions. Gate operations between nearby ions can...
Radiative transition probabilities in atoms are normally calculated from
nonrelativistic wave functions and the electric dipole transition operator.
The theory of relativistic corrections to nonrelativistic energies is well established in terms of the Breit interaction, but the same is not true for relativistic corrections to transition probabilities. Our objectives are (i) to start from...
We present a home-built Czerny-Turner triple-grating spectrometer with a focal length of 1.5m and a basic of-the-shelf astronomy camera. This spectrometer offers high spectral resolution and good light sensitivity at a relatively low cost compared to commercially available systems with similarly large focal length.
The three gratings are mounted on a turret and can be swapped without...
A scheme for an on-demand optical pulse-triggered quantum dot single-photon source which utilizes stimulated Raman adiabatic passage and photonic cavity-coupling is presented. This single photon source is coherently pumped in the presence of a continuous wave drive, allowing for highly efficient indistinguishable single photons to be produced which are of a different polarization than the...
The miniaturization of optically addressable ion traps for the goal of scalable quantum information processing has led to an increased interest in finding a balance between ion and photon confinement.
We propose a radio-frequency ion trap integrated with an optical cavity in which the needle electrodes consist of a pair of tapered metal-coated optical fibers capped with semiconductor...
Band pass optical interference filters can be constructed from simpler, stand-alone filter design components. Typically a peak centered in the filter’s free spectral range is combined with low and high pass filters such that only a desired band pass remains over a wavelength range. The component filters can be either interference or absorption filters chosen such that there are no unwanted...
Visualization of state determination via weak measurements
Igor D. Ivanovic
Physics Department,
Carleton University
Recently the weak measurement expression A_w=(<ψ|A|φ>)/(<ϕ|φ>) and its modification were used in state determination of an unknown state [e.g. 1,2]. In this note a visualization is given of the weak values of an unknown state ϱ_w=(<ψ|ϱ|φ>)/(<ϕ|φ>) , where...
Coupled mode theory is applied to the analysis of a microsphere cavity whispering gallery mode excited by amplitude modulated light. Expressions are derived for the transmitted and backscattered modulation frequency dependent intensity and phase-shift of the light on resonance. Using these expressions, the resonance lifetime and cavity coupling parameters can be derived from the experimental data.
According to recent developments in nanotechnology, the fabrication of nanostructures such as nano-particles (NPs), nano-rods (NRs), and nano-tubes (NTs) have been intensified, which have wide range of applications in electronic, magnetic, optical and energy storage devices. Various processing methods are used such as lithography and porous templates among which porous anodic alumina (PAA)...
