Now showing items 1-15 of 15

• #### Atomic Bose-Hubbard Systems With Single-Particle Control ﻿

(2015-12-14)
Experiments with ultracold atoms in optical lattices provide outstanding opportunities to realize exotic quantum states due to a high degree of tunability and control. In this thesis, I present experiments that extend this ...
• #### Coherent Quantum Optical Control with Subwavelength Resolution ﻿

(American Physical Society, 2008)
We suggest a new method for quantum optical control with nanoscale resolution. Our method allows for coherent far-field manipulation of individual quantum systems with spatial selectivity that is not limited by the wavelength ...
• #### Controlled Preparation and Detection of d-Wave Superfluidity in Two-Dimensional Optical Superlattices ﻿

(Institute of Physics, 2009)
$d$-wave Cooper pairs are believed to be the key for understanding the phenomenon of high-temperature superconductivity in cuprates. These superconductors are an example of the emergence of strong pairing in systems with ...
• #### Engineered potentials and dynamics of ultracold quantum gases under the microscope ﻿

(2014-06-06)
In this thesis, I present experiments on making and probing strongly correlated gases of ultracold atoms in an optical lattice with engineered potentials and dynamics. The quantum gas microscope first developed in our lab ...
• #### Fermi Gas Microscope ﻿

(2012-08-03)
Recent advances in using microscopes in ultracold atom experiment have allowed experimenters for the first time to directly observe and manipulate individual atoms in individual lattice sites. This technique enhances our ...
• #### Inducing Vortices in a Bose-Einstein Condensate Using Holographically Produced Light Beams ﻿

(Optical Society of America, 2011)
In this paper we demonstrate a technique that can create non-equilibrium vortex configurations with almost arbitrary charge and geometry in a Bose-Einstein condensate. We coherently transfer orbital angular momentum from ...
• #### Orbital Excitation Blockade and Algorithmic Cooling in Quantum Gases ﻿

(Nature Publishing Group, 2011)
Interaction blockade occurs when strong interactions in a confined, few-body system prevent a particle from occupying an otherwise accessible quantum state. Blockade phenomena reveal the underlying granular nature of quantum ...
• #### Phase Sensitive Measurements of Order Parameters for Ultracold Atoms through Two Particles Interferometry ﻿

(2011)
Nontrivial symmetry of order parameters is crucial in some of the most interesting quantum many-body states of ultracold atoms and condensed matter systems. Examples in cold atoms include p-wave Feshbach molecules and ...
• #### Photon-Assisted Tunneling in a Biased Strongly Correlated Bose Gas ﻿

(American Physical Society, 2011)
We study the impact of coherently generated lattice photons on an atomic Mott insulator subjected to a uniform force. Analogous to an array of tunnel-coupled and biased quantum dots, we observe sharp, interaction-shifted ...
• #### Probing the Hubbard Model With Single-Site Resolution ﻿

(2016-05-16)
Strongly-correlated electron systems generate some of the richest phenomena and most challenging theoretical problems studied in physics. One approach to understanding these systems is with ultracold fermionic atoms in ...
• #### Probing the Superfluid to Mott Insulator Transition at the Single Atom Level ﻿

(American Association for the Advancement of Science, 2010)
Quantum gases in optical lattices offer an opportunity to experimentally realize and explore condensed matter models in a clean, tunable system. We used single atom–single lattice site imaging to investigate the Bose-Hubbard ...
• #### A Quantum Gas Microscope for Detecting Single Atoms in a Hubbard-Regime Optical Lattice ﻿

(Nature Publishing Group, 2009)
Recent years have seen tremendous progress in creating complex atomic many-body quantum systems. One approach is to use macroscopic, effectively thermodynamic ensembles of ultracold atoms to create quantum gases and strongly ...
• #### Quantum Simulation of Antiferromagnetic Spin Chains in an Optical Lattice ﻿

(Nature Publishing Group, 2011)
Understanding exotic forms of magnetism in quantum mechanical systems is a central goal of modern condensed matter physics, with implications for systems ranging from high-temperature superconductors to spintronic devices. ...
• #### Site-Resolved Imaging with the Fermi Gas Microscope ﻿

(2014-06-06)
The recent development of quantum gas microscopy for bosonic rubidium atoms trapped in optical lattices has made it possible to study local structure and correlations in quantum many-body systems.
• #### Two-Dimensional Quantum Gas in a Hybrid Surface Trap ﻿

(American Physical Society, 2009)
We demonstrate the realization of a two-dimensional (2D) quantum gas in a smooth optical surface trap. Using a combination of evanescent wave, standing wave, and magnetic potentials, we create a long-lived quantum gas deep ...