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Ising deconfinement transition between Feshbach-resonant superfluids.
Published 2011“…We investigate the phase diagram of bosons interacting via Feshbach-resonant pairing interactions in a one-dimensional lattice. …”
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High-precision analysis of Feshbach resonances in a Mott insulator
Published 2021“…Earlier experiments on three of the Feshbach resonances are consistent with this analysis. Moreover, we verify our model with a more rigorous numerical treatment of the two atom system in an optical lattice.…”
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Real-time autodetachment dynamics of vibrational feshbach resonances in multipole-bound states
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Conference Paper -
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Quantum reflection of atoms induced by a Feshbach resonance in the atom-surface potential
Published 2022“…In this final year project thesis, I outline a method to calculate the reflection probability induced by Feshbach resonance between the ground state and the excited state of an atom in an atom surface potential. …”
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Final Year Project (FYP) -
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Competition between Pairing and Ferromagnetic Instabilities in Ultracold Fermi Gases near Feshbach Resonances
Published 2011“…We obtain an effective interaction that takes into account both Pauli blocking and the energy dependence of the scattering amplitude near a Feshbach resonance. Using this interaction we analyze the competing instabilities towards Stoner ferromagnetism and pairing.…”
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Analyzing Feshbach resonances: A [superscript 6]Li-[superscript 133]Cs case study
Published 2014“…Quantitative results for [superscript 6]Li-[superscript 133]Cs are presented and compared to previously measured [superscript 6]Li-[superscript 133]Cs Feshbach resonances (FRs) [Repp et al., Phys. Rev. A 87, 010701(R) (2013)]. …”
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Dimers, Trimers and their Superpositions in a Bose-Fermi Mixture
Published 2024“…We find that in proximity to a Feshbach resonance, the trimer feature closely follows the dimer resonance across an order-of-magnitude variation in binding energy. …”
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Thesis -
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Quantum Controlled Collisions and Magnetic Trapping of Ultracold NaLi Molecules
Published 2023“…The first two experiments are on molecular Feshbach resonances: in spin-polarized ²³Na⁶Li+²³Na collisions and in ²³Na⁶Li+²³Na⁶Li collisions. …”
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Thesis -
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Amplification of Local Instabilities in a Bose-Einstein Condensate with Attractive Interactions
Published 2012“…We observe the amplification of a local instability by seeding a momentum state p and suddenly switching the scattering length negative via a Feshbach resonance. We also observe the appearance of atoms in the conjugate momentum state as required by momentum conservation. …”
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Universal scaling laws in the dynamics of a homogeneous unitary bose gas
Published 2017“…We study the dynamics of an initially degenerate homogeneous Bose gas after an interaction quench to the unitary regime at a magnetic Feshbach resonance. As the cloud decays and heats, it exhibits a crossover from degenerate- to thermal-gas behavior, both of which are characterized by universal scaling laws linking the particle-loss rate to the total atom number N. …”
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High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state
Published 2019“…The proposed scheme is advantageous over typical optical Feshbach resonance in tuning scattering length due to its lower atom loss rate. …”
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Final Year Project (FYP) -
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Elliptic flow in a strongly interacting normal Bose gas
Published 2018“…We study the anisotropic, elliptic expansion of a thermal atomic Bose gas released from an anisotropic trapping potential, for a wide range of interaction strengths across a Feshbach resonance. We show that this hydrodynamic phenomenon is for all interaction strengths fully described by a microscopic kinetic model with no free parameters. …”
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Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
Published 2010“…We determine the polaron energy and the quasiparticle residue for various interaction strengths around a Feshbach resonance. At a critical interaction, we observe the transition from polaronic to molecular binding. …”
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Scattering in Mixed Dimensions with Ultracold Gases
Published 2010“…By applying an external magnetic field in proximity of a Feshbach resonance, we adjust the free-space scattering length to observe a series of resonances in mixed dimensions. …”
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Time-Resolved Observation of Competing Attractive and Repulsive Short-Range Correlations in Strongly Interacting Fermi Gases
Published 2021“…We exploit a time-resolved pump-probe spectroscopic technique to study the out-of-equilibrium dynamics of an ultracold two-component Fermi gas, selectively quenched to strong repulsion along the upper branch of a broad Feshbach resonance. For critical interactions, we find the rapid growth of short-range anticorrelations between repulsive fermions to initially overcome concurrent pairing processes. …”
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Article