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Journals and Conferences
By performing a full analysis of the projected local density of states (LDOS) in a photonic crystal waveguide, we show that phase plays a crucial role in the symmetry of the light-matter interaction. By considering a quantum dot (QD) spin coupled to a photonic crystal waveguide (PCW) mode, we demonstrate that the light-matter interaction can be asymmetric,… (More)
We demonstrate a deterministic shift in phase of an input single photon by a negatively charged quantum dot in a low Q-factor, high output efficiency micropillar cavity, with values up to 2π/3.
Semiconductor quantum dots are often proposed as an ideal means to achieve non-linear interactions and photon switching in semiconductor integrated circuits. We examine here the use of the electron spin degree of freedom as a means to achieve a controllable quantum switching of single photons and trains of photons. We examine some types of spin-based… (More)
Self-assembled quantum dots (QDs), nanosized semiconductors, are often known as artificial atoms due to their atomic-like spectra. For this reason they have long been proposed as a means to mediate interactions between single photons, a useful capability for photonic quantum information technology. I will describe the role of QDs in the latest developments… (More)
We investigate the thermal quantum discord and classical correlations in a two-qubit Ising model interacting with a site-dependent external magnetic field. Systematic study of all correlations is performed for various values of the system’s temperature, and the magnetic field magnitude and direction on each site. Our results reveal interesting findings as… (More)
Quantum dots (QDs) can be incorporated into solid state photonic devices such as cavities or waveguides that enhance the light-matter interaction. A near unit efficiency light-matter interaction is essential for deterministic, scalable quantum information devices . In this limit, a single photon input into the device will undergo a large rotation of the… (More)
We investigate entanglement formation in antiferromagnetic and mixed anisotropic, finite, one-dimensional Heisenberg chains with and without the presence of a uniform magnetic field. We explore the thermal entanglement created in terms of the bounds of the localizable entanglement and the possibility for quantum phase transitions in the zero field cases by… (More)
We report the measurement of macroscopic phase shifts of several degrees for reflected incident light resonant with a bright negatively charged quantum dot (QD) in a micropillar structure of Q-factor less than 200.