Simmons, Ethan Quinn

Quantum degenerate gases, in the form of Bose-Einstein condensates, are ideal objects for probing fundamental quantum mechanical phenomena. These platforms are highly isolated, and enable coherent control and manipulation of quantum matter with exquisite precision. The work presented in this thesis utilizes quantum degenerate gases of bosonic $^7$L...

Bostan, Dulat Mandal, B Joy, Carolin Zoltowski, Michal Lique, François Loreau, Jérôme Quintas-Sánchez, E. Batista-Planas, Adrian Dawes, Richard Babikov, Dmitri
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An updated version of the CO + CO potential energy surface from [R. Dawes, X. G. Wang and T. Carrington, 2013, , 7612] is presented, that incorporates an improved treatment of the asymptotic behavior. It is found that this new surface is only slightly different from the other popular PES available for this system in the literature [G. W. M. Vissers...

Keithley, Kimberlee

In this thesis, I discuss the work I have contributed towards the development andapplication of CSbosonsCpp, a software package written in C++11 and CUDA, designed to simulate systems of many interacting bosons at finite temperature. The simulation method uses Feynman’s path integral in the basis of coherent states fields as the theoretical underpi...

Putnam, Randall

A single $16$~ps laser pulse performs single qubit rotations as well as generates entanglement of the spin and motional degrees of freedom in a single, trapped ${}^{138}$Ba${}^+$ ion. The fidelity of these single qubit rotations was found to be consistent with 100\%, $(97^{+3}_{-4})\%$. Entanglement is demonstrated through the collapse and revival ...

Sajjad, Roshan

Driven degenerate quantum gases are flexible platforms that allow for rich investigationsof quantum dynamics. Certain gases, such as Bose-Einstein condensates of 7Li, also afford the ability to tune interactions and thus study quantum many-body phenomena. In this thesis, I present three experiments which explore dynamic and thermodynamic quantum be...

Tonolo, F. Bizzocchi, L. Rivilla, V. M. Lique, F. Melosso, M. Puzzarini, C.

We report the derivation of rate coefficients for the rotational (de-)excitation of PO$^+$ induced by collisions with H$_2$. The calculations were performed on a four-dimensional potential energy surface, obtained on top of highly accurate $ab$ $initio$ energy points. Preliminary tests pointed out the low influence of the coupling between $j=0$ and...

Koide, Akihiro Rabouli, Sara Le Meur, Pierre Tricot, Sylvain Schieffer, Philippe Sébilleau, D.

We present the MsSpec Atomic Scattering Amplitude Package (MASAP), composed of a computation program and graphical interface to generate atomic scattering amplitude (ASA) an atom, either isolated or embedded in environment, at any chosen energy impinging electron up ≈15 KeV. The ASA is calculated using effective, complex optical potential which pro...

Maghrebi, Khaoula Chantrenne, Isaac Messaoudi, Sabri Frauenheim, Thomas Fihey, Arnaud Lien-Medrano, Carlos R

Gold nanoclusters stand as promising building blocks for solar energy harvesting applications, luminescent materials, and catalytic devices. At the frontier between molecular metallic structures, their large number of electrons prevent use ab initio quantum mechanics method to rationalize predict structure–property relationships, especially when fu...

Pellet-Mary, Clément Perdriat, M Huillery, P. Hétet, G

We study relaxation processes in dipolar-coupled negatively charged nitrogen-vacancy ($\mathrm{N}$-${V}^{\ensuremath{-}}$) centers close to zero field. Specifically, we uncover regimes where flip-flop and double-flip processes, as well mixing induced by local electric fields, play a significant role $\mathrm{N}$-$V$--$\mathrm{N}$-$V$ cross relaxati...

Lamperti, Marco Rutkowski, Lucile Ronchetti, Daniele Gatti, Davide Gotti, Riccardo Cerullo, Giulio Thibault, Franck Jóźwiak, Hubert Wójtewicz, Szymon Masłowski, Piotr
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Molecular hydrogen and its isotopologues are key systems to test quantum electrodynamics (QED) at molecular length scales, as their energy levels can be calculated with high accuracy[1]. Comparison of the theoretical values highly accurate experimental determinations transition frequencies allows one QED theories beyond standard model particle phys...