Delayed Coherent Quantum Feedback from a Scattering Theory and a Matrix Product State Perspective

We study the scattering of photons propagating in a semi-infinite waveguide terminated by a mirror and interacting with a quantum emitter. This paradigm constitutes an example of coherent quantum feedback, where light emitted towards the mirror gets redirected back to the emitter. We derive an analytical solution for the scattering of two-photon states, which is based on an exact resummation of the perturbative expansion of the scattering matrix, in a regime where the time delay of the coherent feedback is comparable to the timescale of the quantum emitter's dynamics. We compare the results with numerical simulations based on matrix product state techniques simulating the full dynamics of the system, and extend the study to the scattering of coherent states beyond the low-power limit.Comment: 28 pages, 6 figure

BIOL 307 Biological Science Foundations Laboratory

Course syllabus for BIOL 307 Biological Science Foundations Laboratory Course description: This course provides a series of laboratory and/or field activities appropriate to the topics covered in BIOL 305 and BIOL 306. It emphasizes both knowledge and skills in laboratory operations

La notion de confiance et le droit du commerce électronique

Le développement d’Internet et des nouvelles technologies de l’information permet l’avènement de relations nouvelles. Ce nouveau potentiel, décuplé par ces technologies en constante évolution, actualise la discussion de notions fondamentales. Le développement de ces relations se fonde sur une notion de confiance qu’il est primordial de comprendre afin de mieux saisir les enjeux liés à ces nouvelles technologies. La notion de confiance est intrinsèquement liée aux développements de nos économies. Elle influence du même coup le commerce électronique et certaines notions du droit.The growth of Internet and information technologies allows the emergence of new contractual relations. The constant evolution of these new technologies has put new lights on the legal theories of trust. It is necessary to understand the importance of trust in order to fully comprehend the issues relating to new technologies. Trust is closely linked to economic growth, and influences online trade and legal theory

Alien Registration- Guimond, Lea (Augusta, Kennebec County)

https://digitalmaine.com/alien_docs/19032/thumbnail.jp

Rabi oscillation in a quantum cavity: Markovian and non-Markovian dynamics

We investigate the Rabi oscillation of an atom placed inside a quantum cavity where each mirror is formed by a chain of atoms trapped near a one-dimensional waveguide. This proposal was studied previously with the use of Markov approximation, where the delay due to the finite travel time of light between the two cavity mirrors is neglected. We show that Rabi oscillation analogous to that obtained with high-finesse classical cavities is achieved only when this travel time is much larger than the time scale that characterizes the collective response of the atomic chain. Therefore, the delay must be taken into account and the dynamics of the problem is inherently non-Markovian. Parameters of interest such as the Rabi frequency and the cavity loss rate due to photon leakage through the mirrors are obtained.Comment: 10 pages, 5 figure

BIOL 307 Biological Science Foundations Laboratory

Course syllabus for BIOL 307 Biological Science Foundations Laboratory Course description: This course provides a series of laboratory and/or field activities appropriate to the topics covered in BIOL 305 and BIOL 306. It emphasizes both knowledge and skills in laboratory operations

‘Intercultural bridges across the Romaine River flowing through the Nitassinan and Minganie (North Shore, Québec)’

Since 2009, a major hydroelectric project on the Romaine River, located in the heart of the Nitassinan, Innus’ ancestral territory, and the regional county municipality (RCM) of Minganie on Québec’s North Shore region, has reshaped the relationships between the Innu and non-Innu and their territory. Given the magnitude of the project, a broader analysis of its economic and environmental impacts has been conducted mainly by Hydro-Québec and other government bodies. However, the intercultural incidences of such project were not anticipated nor included in the project planning phase, which has impeded its maximization of the regional economic spinoffs