John J. Bollinger

Publications

Near ground-state cooling of two-dimensional trapped-ion crystals with more than 100 ions

February 07, 2019

Author(s):

Judith Elena Jordan, Kevin A. Gilmore, Athreya Shankar, Arghavan Safari-Naini, Justin G. Bohnet, Murray Holland, John J. Bollinger

We study, both experimentally and theoretically, electromagnetically induced transparency cooling of the axial drumhead modes of 2-dimensional arrays with up...

Trapped Ion Quantum Information Processing with Squeezed Phonons

January 24, 2019

Author(s):

Wenchao Ge, Brian Sawyer, Joe Britton, Kurt Jacobs, John J. Bollinger, Michael Foss-Feig

Trapped ions offer a pristine platform for quantum computation and simulation, but improving their coherence remains a crucial challenge. Here, we propose and...

Verification of a Many-Ion Simulator of the Dicke Model Through Slow Quenches across a Phase Transition

July 27, 2018

Author(s):

Arghavan Safavi-Naini, R. J. Lewis-Swan, Justin G. Bohnet, M. Garttner, Kevin A. Gilmore, Judith Elena Jordan, J. Cohn, James K. Freericks, Ana M. Rey, John J. Bollinger

We use a self-assembled two-dimensional Coulomb crystal of ∼70 ions in the presence of an external transverse field to engineer a simulator of the Dicke...

Bang-bang shortcut to adiabaticity in the Dicke model as realized in a Penning trap experiment

May 29, 2018

Author(s):

J. Cohn, Arghavan Safari-Naini, R. J. Lewis-Swan, Justin G. Bohnet, M. Garttner, Kevin A. Gilmore, Judith Elena Jordan, Ana M. Rey, John J. Bollinger, James K. Freericks

We introduce a bang-bang shortcut to adiabaticity for the Dicke model, which we implement via a two-dimensional array of trapped ions in a Penning trap with a...

Amplitude sensing below the zero-point fluctuations with a two-dimensional trapped-ion mechanical oscillator

June 29, 2017

Author(s):

Kevin A. Gilmore, Justin G. Bohnet, Brian C. Sawyer, Joseph W. Britton, John J. Bollinger

We present measurements of the amplitude of a center-of-mass (COM) motion of a two-dimensional ion crystal composed of 100 ions in a Penning trap. For motion...