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Publications

Search Publications by

John J. Bollinger (Fed)

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Displaying 26 - 50 of 129

Spectroscopy and Thermometry of Drumhead Modes in a Mesoscopic Trapped-Ion Crystal Using Entanglement

May 25, 2012
Author(s)
Brian C. Sawyer, Joseph W. Britton, Adam Keith, C.-C Joseph Wang, James K. Freericks, Hermann Uys, Michael Biercuk, John J. Bollinger
We demonstrate a method of sensitive detection and thermometry of individual modes in cold (sim1 mK), planar one-component ion plasmas. Exploiting precise control over the valence electron spins of several hundred crystallized 9Be+ confined in a Penning

Engineered two-dimensional Ising interactions on a trapped-ion quantum simulator with hundreds of spins

April 26, 2012
Author(s)
Joseph W. Britton, Brian C. Sawyer, Adam Keith, C.-C. Joseph Wang, James K. Freericks, Hermann Uys, Michael Biercuk, John J. Bollinger
The presence of long-range quantum spin correlations underlies a variety of physical phenomena in condensed matter systems, potentially including high-temperature superconductivity, making this a fertile area for exploration. Unfortunately, many properties

Diamagnetic correction to the 9 Be + ground-state hyperfine constant

July 22, 2011
Author(s)
Nobuyasu Shiga, Wayne M. Itano, John J. Bollinger
We report an experimental determination of the diamagnetic correction to the 9Be+ ground state hyperfine constant A. We measured A = −625 008 837.371(11) Hz at a magnetic field B of 4.4609 T. Comparison with previous results, obtained at lower values of B

Phase-coherent detection of an optical dipole force by Doppler velocimetry

May 10, 2011
Author(s)
Michael J. Biercuk, Hermann Uys, Joseph W. Britton, Aaron Vandevender, John J. Bollinger
We report phase-coherent Doppler detection of optical dipole forces using large ion crystals in a Penning trap. The technique is based on laser Doppler velocimetry using a cycling transition in 9Be+ near 313 nm and the center-of-mass (COM) ion motional

Filtering noise with a quantum probe

May 5, 2011
Author(s)
John J. Bollinger
I discuss in general terms the ideas behind the manuscript "Single-ion quantum lock-in amplifier" by Kotler and colleagues which is scheduled to be published in the journal Nature. The Kotler manuscript describes a generalization of the concept of lock-in

Decoherence due to elastic Rayleigh scattering

November 12, 2010
Author(s)
Hermann Uys, Michael J. Biercuk, Aaron Vandevender, Christian Ospelkaus, Dominic Meiser, R. Ozeri, John Bollinger
We present theoretical and experimental studies of the decoherence of hyperfine ground-state superpositions due to elastic Rayleigh scattering of off-resonant light. We demonstrate that under appropriate conditions, elastic Rayleigh scattering can be the

Toward Spin Squeezing with Trapped Ions

September 23, 2010
Author(s)
John J. Bollinger, Hermann Uys, Michael Biercuk, Joseph W. Britton
Building robust instruments capable of making interferometric measurements with precision beyond the standard quantum limit remains an important goal in many metrology laboratories. We describe here the basic concepts underlying spin squeezing experiments

yocto-Newton force detection sensitivity using trapped ions

August 22, 2010
Author(s)
Michael J. Biercuk, Joseph W. Britton, Hermann Uys, Aaron Vandevender, John Bollinger
Recent experimental advances have shown that it is possible to detect forces arising from electric fields at a level of aN/ √Hz (atto = 10-18 through coupling of micro or nanofabricated mechanical resonators to a variety of physical systems including

Preserving quantum coherence using optimized open-loop control techniques

May 16, 2010
Author(s)
Michael J. Biercuk, Hermann Uys, Aaron Vandevender, Nobuyasu Shiga, Wayne M. Itano, John J. Bollinger
We describe experimental and theoretical studies of open-loop quantum control techniques known as dynamical decoupling (DD) for the suppression of decoherence-induced errors in quantum systems. Our experiments on trapped atomic ion qubits demonstrate that

Toward scalable ion traps for quantum information processing

March 16, 2010
Author(s)
Jason Amini, Hermann Uys, Janus H. Wesenberg, Signe Seidelin, Joseph W. Britton, John J. Bollinger, Dietrich G. Leibfried, Christian Ospelkaus, Aaron Vandevender, David J. Wineland
The basic components for a quantum information processor using trapped ions have been demonstrated in a number of experiments. To perform complex algorithms that are not tractable with classical computers, these components need to be integrated and scaled

High-Fidelity Quantum Control Using 9Be+ Ion Crystals in a Penning Trap

August 19, 2009
Author(s)
Michael J. Biercuk, Hermann Uys, Aaron Vandevender, Nobuyasu Shiga, Wayne M. Itano, John J. Bollinger
We provide an introduction to the use of ion crystals in a Penning trap for experiments in quantum information. Macroscopic Penning traps allow for the containment of a few to a few million atomic ions whose internal states may be used in quantum

Optimize Noise Filtration through Dynamical Decoupling

July 24, 2009
Author(s)
Hermann Uys, Michael J. Biercuk, John J. Bollinger
One approach to maintaining phase coherence of qubits through dynamical decoupling consists of applying a sequence of Hahn spin-echo pulses. Recent studies have shown that, in certain noise environments, judicious choice of the delay times between these

Experimental Uhrig Dynamical Decoupling Using Trapped Ions

June 25, 2009
Author(s)
Michael J. Biercuk, Hermann Uys, Aaron Vandevender, Nobuyasu Shiga, Wayne M. Itano, John J. Bollinger
We present a detailed experimental study of the Uhrig Dynamical Decoupling (UDD) sequence in a variety of noise environments. Our qubit system consists of a crystalline array of 9Be+ ions confined in a Penning trap. We use an electron-spin-flip transition

Entangled Mechanical Oscillators

June 4, 2009
Author(s)
John D. Jost, Jonathan Home, Jason Amini, David Hanneke, R. Ozeri, Christopher Langer, John J. Bollinger, Dietrich G. Leibfried, David J. Wineland
Quantum mechanics describes the state and evolution of isolated systems, where entangled and superposition states can be created. Its application to large systems led Schr dinger to posit his famous cat, which exists in a superposition of alive and dead

Optimized Dynamical Decoupling in a Model Quantum Memory

April 23, 2009
Author(s)
Michael J. Biercuk, Hermann Uys, Aaron Vandevender, N. Shiga, Wayne M. Itano, David J. Wineland, John J. Bollinger
We demonstrate the efficacy of optimized dynamical decoupling pulse sequences in suppressing phase errors in a model quantum memory. Our experimental system consists of a crystalline array of trapped 9Be+ ions in which we drive a qubit transition at $\sim

Prolonging qubit coherence: dynamic decoupling schemes studied in a Penning ion trap

February 2, 2009
Author(s)
Hermann Uys, Michael J. Biercuk, Aaron Vandevender, N. Shiga, Wayne M. Itano, John J. Bollinger
We present a study of dynamical decoupling schemes for the suppression of phase erros due to various noise environments using ions in a Penning ion trap as a model ensemble of qubits. By injecting frequency noise we demonstrate that in an Ohmic noise

Simplified motional heating rate measurements of trapped ions

September 19, 2007
Author(s)
Ryan Epstein, Signe Seidelin, Dietrich G. Leibfried, Janus Wesenberg, John J. Bollinger, Jason Amini, Brad R. Blakestad, Joseph W. Britton, Jonathan Home, Wayne M. Itano, John D. Jost, Emanuel H. Knill, C. Langer, R. Ozeri, Nobuyasu Shiga, David J. Wineland
We measure motional heating rates of trapped atomic ions, a factor that influences multi-ion quantum logic gate fidelities. Two simplified techniques are developed for this purpose: one relies on Raman sideband detection implemented with a single laser

Towards scaling up trapped ion quantum information processing

June 19, 2007
Author(s)
Dietrich G. Leibfried, David J. Wineland, Brad R. Blakestad, John J. Bollinger, Joseph W. Britton, J Chiaverini, Ryan Epstein, Wayne M. Itano, John D. Jost, Emanuel H. Knill, C. Langer, R Ozeri, Rainer Reichle, Signe Seidelin, Nobuyasu Shiga, Janus Wesenberg
Recent theoretical advances have identifed several computational algorithms that can be implemented utilizing quantum information processing (QIP), which gives an exponential speedup over the corresponding (known) algorithms on conventional computers. QIP

Trapped atomic ions and quantum information processing

July 16, 2006
Author(s)
David J. Wineland, Dietrich G. Leibfried, James C. Bergquist, Brad R. Blakestad, John J. Bollinger, Joseph W. Britton, J Chiaverini, Ryan Epstein, David Hume, Wayne M. Itano, John D. Jost, Emanuel H. Knill, Jeroen Koelemeij, C. Langer, R Ozeri, Rainer Reichle, Till P. Rosenband, Tobias Schaetz, Piet Schmidt, Signe Seidelin, Nobuyasu Shiga, Janus Wesenberg
The basic requirements for quantum computing and quantum simulation (Single- and multi-qubit gates, long memor times, etc.)have been demonstrated in separate experiments on trapped ions. Construction of a large-scale information processor will require

A Microfabricated Surface-Electrode Ion Trap for Scalable Quantum Information Processing

June 30, 2006
Author(s)
Signe Seidelin, J Chiaverini, Rainer Reichle, John J. Bollinger, Dietrich G. Leibfried, Joseph W. Britton, Janus Wesenberg, Brad R. Blakestad, John D. Jost, David Hume, C. Langer, R Ozeri, Nobuyasu Shiga, David J. Wineland
We demonstrate confinement of individual atomic ions in an RF Paul trap with novel geometry where the electrodes are located in a single plane and the ions confined above this plane. This device is realized with a simple fabrication procedure and has

A Microfabricated Surface-Electrode Ion Trap for Scalable Quantum Information Processing

June 30, 2006
Author(s)
Signe Seidelin, J Chiaverini, Rainer Reichle, John J. Bollinger, Dietrich G. Leibfried, Joseph W. Britton, Janus Wesenberg, Brad R. Blakestad, John D. Jost, David Hume, C. Langer, R Ozeri, Nobuyasu Shiga, David J. Wineland
We demonstrate confinement of individual atomic ions in an RF Paul trap with novel geometry where the electrodes are located in a single plane and the ions confined above this plane. This device is realized with a simple fabrication procedure and has

Trapped Atomic Ions and Quantum Information Processing

January 1, 2006
Author(s)
David J. Wineland, Dietrich G. Leibfried, James C. Bergquist, R B. Blakestad, John J. Bollinger, Joseph W. Britton, J Chiaverini, Ryan Epstein, David Hume, Wayne M. Itano, John D. Jost, E Knill, Jeroen Koelemeij, Christopher Langer, R Ozeri, Rainer Reichle, Till P. Rosenband, T Schaetz, Piet Schmidt, Signe Seidelin, Nobuyasu Shiga, Janus Wesenberg