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26 results on '"Shaw, Zachary"'

1. Engineering Dynamical Phase Diagrams with Driven Lattices in Spinor Gases

Author

Austin-Harris, Jared O., Hardesty-Shaw, Zachary N., Guan, Qingze, Binegar, Cosmo, Blume, Doerte, Lewis-Swan, Robert J., and Liu, Yingmei

Subjects
Condensed Matter - Quantum Gases
Abstract

We experimentally demonstrate that well-designed driven lattices are versatile tools to simultaneously tune multiple key parameters (namely spin-dependent interactions, spinor phase, and Zeeman energy) for manipulating phase diagrams of spinor gases with negligible heating and atom losses. This opens a new avenue for studying dynamical phase transitions in engineered Hamiltonians. The driven lattice creates additional separatrices in phase space at driving-frequency-determined locations, with progressively narrower separatrices at higher Zeeman energies due to modulation-induced higher harmonics. The vastly expanded range of magnetic fields at which significant spin dynamics occur and improved sensitivities at higher harmonics represent a step towards quantum sensing with ultracold gases.

Published
2023

2. Manipulation of nonequilibrium spin dynamics of an ultracold gas in a moving optical lattice

Author

Hardesty-Shaw, Zachary N., Guan, Qingze, Austin, Jared O., Blume, Doerte, Lewis-Swan, Robert J., and Liu, Yingmei

Subjects
Condensed Matter - Quantum Gases
Abstract

The isolation and control of disparate degrees of freedom underpin quantum simulators. We advance the programmability of cold atom quantum simulators with a first realization of the dynamic interplay of spatial and spin degrees of freedom. We experimentally demonstrate that violent spatial evolutions tune long-lived coherent spin dynamics and develop a model of quantum spin-mixing incorporating the spatial evolution via time-dependent spin-spin interactions. Our results open new paths towards the simulation of quantum spin models with tunable interactions via tailored spatial dynamics.

Published
2023

11. Inpatient Management of Monkeypox

Author

Shaw, Zachary, primary, Selvaraj, Vijairam, additional, Finn, Arkadiy, additional, Lorenz, Matthew L., additional, Santos, Michael, additional, and Dapaah-Afriyie, Kwame, additional

Published
2022
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13. The multipactor effect in rectangular waveguides

Author

Shaw, Zachary Charles and Shaw, Zachary Charles

Abstract

The multipactor effect is studied at length in rectangular waveguide geometries akin to WR-284. A test section utilizing a plug and play method was designed and implemented in order to carry out measurements with multiple test gaps. While many studies implement the use of global detection methods, usually in the form of phase and/or power monitoring, this test cell utilizes both local and global detection methods. An electron multiplier tube is used as the local detection method in order to view electron multiplication events with ns resolution in order to better understand the effects multipactor has on high Q structures. Multipactor was measured at 2.85 GHz with input powers fed into the test section ranging from single kW to MW. Measurements are reported for 'as processed' copper samples, as well as said samples undergoing an in situ bakeout. Comparison of measurements post bakeout coincided with literature in the desorption of surface contaminants contributing to an increase in secondary electron yield fi rst crossover point as compared to its 'as processed' counterpart. While lower thresholds for the multipactor effect were found for the samples, the reported data suggests that there is no theoretical upper limit in rectangular waveguide geometries due to the propagating modes electric fi eld distribution. As power was increased far past the requirements for first order multipactor, a temporal separation of the forward power detuning signal from the electron growth signal was observed, suggesting that at high power levels multipactor conducive regions shift towards the broadside walls of the waveguide, due to the field distribution of the dominant TE10 mode., Embargo status: Restricted until 06/2022. To request the author grant access, click on the PDF link to the left.

Published
2021

21. Physical encryption by the transmission of nonperiodic signal sets with a phased array

Author

Shaw, Zachary Charles, Dickens, James C., and Neuber, Andreas A.

Subjects
Pulsed antenna array, Physical layer encryption
Abstract

A system capable of generating continuous and nonperiodic of multiple frequen- cies and shape is constructed. Using user defined nonperiodic signals, a novel phys- ical layer encryption technique is experimentally verified via the synthetization of frequency specific, continuous signals in free space. In order to take advantage of nanosecond impulses transmitted in the time domain, a TEM Horn antenna with a Chebyshev taper is implemented. The time-domain impulse response of the TEM Horn is verifed theoretically and experimentally. Further experiments verify the re- gion in which the intended signal is received, and the limits of the area based on an antenna array configuration is established. Comparisons of modern physical layer en- cryption techniques are made to the results shown, and how the proposed technique quells a common drawback from other established techniques.

Published
2017

24. 2016 Legislative Update

Author

Utah. Statewide Association of Prosecutors, Salt Lake County (Utah). District Attorney's Office, Utah Prosecution Council, Utah. Attorney General's Office, Davis County (Utah). Attorney's Office, Layton (Utah). Attorney's Office, Utah County (Utah). Attorney's Office, Goddard, Darcy, Miller, Adam, Church, Robert, Shaw, Zachary, Garside, Steven, Geddes, Neal, Wright, Kelly, Barnes, Stephen, Skeen, Tyson, Johnson, Brad, Kelly, Donna, Farraway, Wade, Crane, Gary, Nash, Mark, Platt, Chad, Boyden, Paul, Bodily, Tim, Mills, Nic, Jones, Marlesse, Preston, Chris, Walsh, David, Utah. Statewide Association of Prosecutors, Salt Lake County (Utah). District Attorney's Office, Utah Prosecution Council, Utah. Attorney General's Office, Davis County (Utah). Attorney's Office, Layton (Utah). Attorney's Office, Utah County (Utah). Attorney's Office, Goddard, Darcy, Miller, Adam, Church, Robert, Shaw, Zachary, Garside, Steven, Geddes, Neal, Wright, Kelly, Barnes, Stephen, Skeen, Tyson, Johnson, Brad, Kelly, Donna, Farraway, Wade, Crane, Gary, Nash, Mark, Platt, Chad, Boyden, Paul, Bodily, Tim, Mills, Nic, Jones, Marlesse, Preston, Chris, and Walsh, David

Abstract

This publication constitutes summaries of legislation passed during the 2016 General Session of the Utah Legislature relating to criminal law and criminal procedure and to county and city government.

Published
2016

25. 2015 legislative update

Author

Utah. Statewide Association of Prosecutors, Salt Lake County (Utah). District Attorney's Office, Utah Prosecution Council, Utah. Attorney General's Office, Layton (Utah). Attorney's Office, Miller, Adam, Church, Robert, Shaw, Zachary, Garside, Steven, Wright, Kelly, Barnes, Stephen, Johnson, Brad, Kelly, Donna, Farraway, Wade, Sarin, Neil, Lambert, Ryan, Anderson, Gavin, Nash, Mark, Berkovich, Ed, Platt, Chad, Wilde, David, Boyden, Paul, Bodily, Tim, Preston, Chris, Utah. Statewide Association of Prosecutors, Salt Lake County (Utah). District Attorney's Office, Utah Prosecution Council, Utah. Attorney General's Office, Layton (Utah). Attorney's Office, Miller, Adam, Church, Robert, Shaw, Zachary, Garside, Steven, Wright, Kelly, Barnes, Stephen, Johnson, Brad, Kelly, Donna, Farraway, Wade, Sarin, Neil, Lambert, Ryan, Anderson, Gavin, Nash, Mark, Berkovich, Ed, Platt, Chad, Wilde, David, Boyden, Paul, Bodily, Tim, and Preston, Chris

Abstract

This publication constitutes summaries of legislation passed during the 2015 General Session of the Utah Legislature relating to criminal law and criminal procedure and to county and city government.

Published
2015

26. 2014 legislative update

Author

Utah. Statewide Association of Prosecutors, Utah Association of Counties, Salt Lake County (Utah). District Attorney's Office, Utah Prosecution Council, Utah. Attorney General's Office, Layton (Utah). Attorney's Office, Trupp, Adam, Miller, Adam, Shaw, Zachary, Ward, Mark, Garside, Steven, Wright, Kelly, Barnes, Stephen, Johnson, Brad, Kelly, Donna, Barlow, Craig, Lambert, Ryan, Anderson, Gavin, Nash, Mark, Berkovich, Ed, Platt, Chad, Smith, Paula, Wilde, David, Boyden, Paul, Bodily, Tim, Preston, Chris, Utah. Statewide Association of Prosecutors, Utah Association of Counties, Salt Lake County (Utah). District Attorney's Office, Utah Prosecution Council, Utah. Attorney General's Office, Layton (Utah). Attorney's Office, Trupp, Adam, Miller, Adam, Shaw, Zachary, Ward, Mark, Garside, Steven, Wright, Kelly, Barnes, Stephen, Johnson, Brad, Kelly, Donna, Barlow, Craig, Lambert, Ryan, Anderson, Gavin, Nash, Mark, Berkovich, Ed, Platt, Chad, Smith, Paula, Wilde, David, Boyden, Paul, Bodily, Tim, and Preston, Chris

Abstract

This publication constitutes summaries of legislation passed during the 2014 General Session of the Utah Legislature relating to criminal law and criminal procedure and to county and city government.

Published
2014

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