Department of Physics

Moulton Hall 311

Campus Box 4560

Normal,
Il
61790-4560

309-438-8756

People Involved

Dr. Rainer Grobe (Director) Dr. Quichang Su (Co-Director) Dr. Taiwang Cheng (Research Associate)

## Research Associate

#### Dr. Robert E. Wagner

## Undergraduate Research Students

#### Samantha Norris

I started directly after I graduated from high school in Peoria. Research is fun and you get to collaborate with many great people.

*Publications*

- "Instantaneous rest frame transformation method for temporally induced pair creation" Q.Z. Lv, A. Vikartofsky, S. Norris, Y.J. Li, R. Wagner, R. Grobe and Q. Su, Phys. Rev. A (submitted).
- "Absorbing-like boundaries for quantum field theoretical grid simulations" S. Norris, A. Vikartofsky, R.E. Wagner, Q. Su and R. Grobe, Comp. Phys. Comm. 184, 2412 (2013).

*Conference Presentations*

ISU Undergrad. Symp (2013,2014), ISAAPT (2013,2014), Argonne Undergrad. Symp (2012,2013).

#### Andrew Vikartofsky

I transferred from Purdue University. I enjoy my research experience at ILP. I am presently applying at graduate schools in Physics.

*Publications*

- "Instantaneous rest frame transformation method for temporally induced pair creation" Q.Z. Lv, A. Vikartofsky, S. Norris, Y.J. Li, R. Wagner, R. Grobe and Q. Su, Phys. Rev. A (submitted).
- "Absorbing-like boundaries for quantum field theoretical grid simulations" S. Norris, A. Vikartofsky, R.E. Wagner, Q. Su and R. Grobe, Comp. Phys. Comm. 184, 2412 (2013).
- "Dynamics of two- and four-boson interactions in dressed vacuum states" R.E. Wagner, M.R. Ware, A.M. Vikartofsky, Q. Su and R. Grobe, Int. J. Theor. 51, 3787-3804 (2012).

*Conference Presentations*

APS Prairie Section (2011), ISU Undergrad. Symp (2012,2013,2014), ISAAPT (2012,2013,2014), Argonne Undergrad. Symp (2011,2012,2013).

#### Isaac L. Goodin

I began working for the ILP center as the succesor of Sawyer in the bio-optical laboratory. The LabView codes that control our translation stage and the photo detector are really complicated, but I am making progress. My hobbies are dancing and reading.

*Publications*

- "Laser beam widening mechanisms in turbid media" S.D. Campbell, T.P. Garvin, I.L. Goodin, Q. Su and R. Grobe, Las. Phys. 19, 238 (2009).
- "Decomposition based imaging with fiber and ccd camera detections" S.D. Campbell, I.L. Goodin, S.D. Grobe, Q. Su and R. Grobe, J. Opt. Health Sci. 1, 115 (2008).
- "Limitations of decomposition based imaging of longitudinal absorber configurations" S.D. Campbell, S.D. Grobe, I.L. Goodin, Q. Su and R. Grobe, Phys. Rev. A 77, 023821 (2008).
- "Decomposition based recovery of absorbers in turbid media" S.D. Campbell, I.L. Goodin, S.D. Grobe, Q.Su and R. Grobe, Phys. Rev. A 76, 063802 (2007).

*Conference Presentations*

APS Prairie Section (2009), ISU Undergrad. Symp (2007,2008,2009,2010), ISAAPT (2007,2008,2009,2010), Argonne Undergrad. Symp (2007,2008).

#### Emily Gospodarczyk

I study the fermion-boson interaction through a model Yukawa system. It turns out that during the interaction bosons are gathered around fermions to form the so called "dress" fermion, or the so-called "physical", states. The interaction in the so-called Greenberg-Schweber limit becomes completed decoupled. Technically I accomplish my computations by diagonizing large matrices. Research has been a tremendous experience for me, and I have been lucky to be chosen as a 2009 Barry Goldwater Scholar.

*Publications*

- "Numerical studies of a model fermion-boson system" T. Cheng, E.R. Gospodarczyk, Q. Su and R. Grobe, Ann. Phys. 325, 265 (2010)

*Conference Presentations*

ISU Undergrad. Symp (2009), ISAAPT (2009), Argonne Undergrad. Symp (2008).

#### Matt Morris

I joined ILP in the summer of 2010, before transferring from Heartland Community College. I have been studying relativistically invariant time dilation effects in a two particle system under the Lorentz transformation, as compared with Poincare derived numerically modeled orbits. I am also now exploring new ways to model and understand the exchange force between fermions and bosons. I have been fascinated by topics in quantum computers, biophysics, neuroscience, and conceptually variant models of time. Aside from reading, learning physics, math, and conducting research, I am also involved in numerous collaborative works of art, music, and literature. I love to travel as often as possible, and to spend time with my close friends and family.

*Publications*

- "Time dilation in relativistic two-particle interactions" B.T. Shields, M.C. Morris, M.R. Ware, Q. Su, E.V. Stefanovich and R. Grobe, Phys. Rev. A. 82, 052116 (2010).

#### Benjamin Rogers

I am exploring new ways to reconstruct images from scattered light data. In particular the Principal Component Analysis is very interesting as the same method has been used in facial recognition. Besides doing research in the dark (room), I like to read and hang out with Physics majors and be enlightened.

*Publications*

- "Scanning techniques for decomposition based imaging of turbid media" B. Rogers, B. Graybeal, A.C. Su, R.E. Wagner, M.R. Ware, Q. Su and R. Grobe, Laser Phys. 23, 036003 (2013).

*Conference Presentations*

APS Prairie Section (2009), ISU Undergrad. Symp. (2010), ISAAPT (2010).

#### Benjamin Shields

I study the problem of possible violation of causality in quantum relativistic situations. Numerical and analytical evidence show that total probability out side of light cone does not vanish. In my spare time, I enjoy reading and hiking.

*Publications*

- "Causality and relativistic localization in one-dimensional Hamiltonians" R.E. Wagner, B.T. Shields, M.R. Ware, Q. Su and R. Grobe, Phys. Rev. A 83, 062106 (2011).
- "A space-time resolved approach for interacting quantum field theories" R.E. Wagner, M.R. Ware, B.T. Shields, Q. Su and R. Grobe, Phys. Rev. Lett. 106, 023601 (2011).
- "Time dilation in relativistic two-particle interactions" B.T. Shields, M.C. Morris, M.R. Ware, Q. Su, E.V. Stefanovich and R. Grobe, P hys. Rev. A 82, 052116 (2010).

*Conference Presentations*

ISU Undergrad. Symp. (2010,2012), ISAAPT (2010,2012), APS Prairie Section (2010,2011), Argonne (2010,2011), APS DAMOP meeting, (2011).

#### Andrew Steinacher

After having worked the summer at Mathematica, I joined ILP this fall. I am presently considering which graduate school to apply to.

*Publications*

- "Impact of interfermionic forces on the pair creation process" A.T. Steinacher, R.E. Wagner, Q. Su and R. Grobe, Phys. Rev. (in press).

*Conference Presentations*

ISAAPT (2014), ISU Undergrad. Symp. (2014), Argonne (2013),

#### Alexander C. Su

I joined ILP during my high school years. It has been a very fascinating experience to "do" things that are usually found in textbooks.

*Publications*

- "Pair creation for bosons in electric and magnetic fields" Q.Z. Lv, A.C. Su, M. Jiang, Y.J. Li, R. Grobe and Q. Su, Phys. Rev. A 87, 023416 (2013).
- "Scanning techniques for decomposition based imaging of turbid media" B. Rogers, B. Graybeal, A.C. Su, R.E. Wagner, M.R. Ware, Q. Su and R. Grobe, Laser Phys. 23, 036003 (2013).

*Conference Presentations*

APS Prairie Section (2011), ISAAPT (2012,2014), ISU Undergrad. Symp. (2012,2013,2014), Argonne (2012,2013), LAW (China, 2013), Intel Science Fair (2012), IL State Science Fair (2012,2013).

#### Matt Ware

I joined ILP the summer I graduated from Normal Community High School in 2009. I helped to design computer program codes to compute the scattering of a boson off a potential barrier. Such an exercise turns out to be related closely with boson pair creation based on full quantum field considerations. I am very fortunate to have received the 2010 Barry Goldwater Scholarship. Besides research and doing challenging math, I like biking and learning foreign languages such as German and Chinese.

*Publications*

- "Scanning techniques for decomposition based imaging of turbid media" B. Rogers, B. Graybeal, A.C. Su, R.E. Wagner, M.R. Ware, Q. Su and R. Grobe, Laser Phys. 23, 036003 (2013).
- "Causality and relativistic localization in one-dimensional Hamiltonians" R.E. Wagner, B.T. Shields, M.R. Ware, Q. Su and R. Grobe, Phys. Rev. A 83, 062106 (2011).
- "A space-time resolved approach for interacting quantum field theories" R.E. Wagner, M.R. Ware, B.T. Shields, Q. Su and R. Grobe, Phys. Rev. Lett. 106, 023601 (2011).
- "Time dilation in relativistic two-particle interactions" B.T. Shields, M.C. Morris, M.R. Ware, Q. Su, E.V. Stefanovich and R. Grobe, P hys. Rev. A 82, 052116 (2010).
- "Space-time properties of a boson-dressed fermion for the Yukawa model" R.E. Wagner, M.R. Ware, Q. Su and R. Grobe, Phys. Rev. A 82, 032108 (2010).
- "The bosonic analogue of the Klein paradox" R.E. Wagner, M.R. Ware, Q. Su and R. Grobe, Phys. Rev. A 81, 024101 (2010).
- "Exponential enhancement of field-induced pair creation from the bosonic vacuum" R.E. Wagner, M.R. Ware, Q. Su and R. Grobe, Phys. Rev. A 81, 052104 (2010).
- "Pair creation rates for one-dimensional fermionic and bosonic vacua" T. Cheng, M. Ware, Q. Su and R. Grobe, Phys. Rev. A 80, 062105 (2009). Also published in V. J. Ultrafast Sci. 9, 1 (2010).

*Conference Presentations*

APS Prairie Section (2009,2011), ISU Undergrad. Symp. (2010,2012,2013), ISAAPT (2010,2012), APS DAMOP meeting, (2011), Argonne (2011,2012), APS LeRoy Apker final (2012).

#### Brandon Graybeal

I found it rather fascinatinig to work on imaging algorithms and learning how to use Mathematica and fortran.

*Publications*

*Conference Presentations*

APS Prairie Section (2011), ISAAPT (2011,2012), ISU Undergrad. Symp. (2011,2012), Argonne (2011).

#### David Wischhusen

I joined ILP during my Freshman year in 2006 and work in the quantum field theory group. My present job is to develop better computer graphics and movies to better visualize the pair-creation dynamics. I work closely with Nic and Dr. Cheng. I love the Chicago cubs.

*Conference Presentations*

APS Prairie Section (2009), ISU Undergrad. Symp. (2008,2009,2010), ISAAPT (2007,2008,2009), Argonne Undergrad. Symp (2007,2008).

## Honorary Junior Members

#### Christian E. and Sebastian D. Grobe

Our duties include keeping our parents busy and maintaining a certain disorder in our house. We also decide on the usage of the Grobe residence computer.

*Publications*

- "Techniques to Ruin a Peaceful Parental Life" C.E. Grobe and S.D. Grobe, J. Act. Kids 49, 731 (1997).

#### Alexander C. and Christina J. Su

It is fun to play together and also to play with Dad's computer. He uses scientific terms to describe our activities in the house as "constructive" interference. Hope we know what that means some day.

## Former Members

Click here for more information about these former members of ILP

- Ryan M. Balfanz
- Anthony Battaglia
- Michael S. Bell
- Alexander Bergquist
- Trisha Blood
- Joshua W. Braun
- Sawyer D. Campbell
- Kareem Carr
- Kevin Cooley
- Nic Chott
- Jason C. Csesznegi
- Jennifer R. Csesznegi
- Travis N. Faust
- Tim Garvin
- Joshua C. Gillespie
- Sebastian D. Grobe
- John C. Henderson
- Benjamin P. Irving
- Marek M. Jacobs
- Chad W. Johnson
- Nathan Kidwell
- Kara D. Lamb
- Allen F. Lewis
- Shannon M. Mandel
- Kimberly N. McGill
- Matthew E. Narter
- Kevin M. Paul
- Alison O'Connell
- Peter J. Peverly
- Tony J. Piraino
- Sarah Radovich
- Kelly N. Rodeffer
- Tyson R. Shepherd
- Kress M. Shores
- Brad A. Smetanko
- Robert E. Wagner
- Rebecca Wenning
- Dr. Taiwang Cheng
- Dr. Piotr Krekora
- Dr. Sunish Menon
- Dr. Harshwardhan Wanare