Principal Investigator


Holger Müller

hm [at)

Awarded his first patent at the age of 14, Holger continues his inventive spirit as a physicist applying matter-wave interferometry to fundamental and exotic physics. 



Richard Parker

rhparker [at)

I did graduate work at the University of Chicago/Argonne National Laboratory, completing the first electric dipole moment (EDM) measurements of 225Ra. I currently work on another precision measurement project group at Berkeley, measuring the fine structure constant. My interests include history, hiking, and travel.

Xuejian Wu

xuejianw [at)

I am a postdoc in Prof. Müller's group and I am currently working on a transportable, multi-axis atom interferometer. I received my PhD from Tsinghua University in January 2015.

Philipp Haslinger

haslinger [at)

I am interested in a variety of topics: tests of Lorentz invariance, quantum decoherence, quantum linearity, tests, beam methods, as well as cooling and trapping and quantum optics with atoms, biomolecules, and nanoparticles.

Osip Schwartz

osip.schwartz [at)

I am working on phase contrast electron microscopy, a project combining laser-controlled matter interference and electron microscopy for imaging of biological macromolecules. In my PhD in the Weizmann Institute of Science, Israel, I worked on quantum imaging and super-resolution optical microscopy.


Sara Campbell

sara [at)

I did my PhD in Jun Ye's group at JILA, where I tore down the world's most accurate clock and hung out in the electronics shop with the guy who puts the "H" in "PDH."  I am very excited to be working on the phase contrast electron microscopy project, where such laser locks will improve contrast, opening the door to new biomolecules that were previously too small or too flexible for single particle cryo-EM.  Outside of lab, I enjoy climbing, mountaineering, and backcountry skiing, and being new to the area, I'm looking for more partners, so please shoot me an email!



Eric Copenhaver

eric.copenhaver [at)

I am motivated to apply the rich toolkit of Atomic, Molecular, and Optical physics to a breadth of problems in metrology, technology, and fundamental physics. While I love olympic lifting and my wife, my primary life aspiration is to make it big with Holger as the lead singer and guitarist in a band called the Phrygicists.


Kayleigh Cassella

kcassell [at)

After studying physics and chemistry at Indiana University South Bend, I came to Berkeley to further pursue my interest in fundamental physics. I enjoy reading, yoga, and (of course!) spending time with my husband and three children.  

Matt Jaffe

mjaffe [at)

I did my undergrad at Penn State, where my addictions to physics and ultimate frisbee took control over the rest of my life. Outside of the lab, I play for the San Jose Spiders and Oakland Guerrilla. I work on the cavity interferometer.

Chenghui Yu

I'm a Berkeley PhD student from China. I finished my college in 2012 at Tsinghua University, Beijing. I'm so attracted by the great science people are doing in Holger's lab with just tabletop experiments. I'm currently working on the fountain experiment measuring the fine structure constant. Though the experiment is hard, it's an exciting experience to explore new things that no one has ever tried.


Weicheng Zhong

zhongw [at)

I received my Bachelor's degree in physics from the University of Science and Technology of China in 2014. Outside of lab, I am a big fan of Manga and dumplings.



Victoria Xu

vxu [at)

After studying physics at UC Santa Barbara, I moved back up to the bay for graduate school at Berkeley. I'm excited about studying gravity, fundamental physics, and generally, searching for new physics with complex, fun, table top experiments. I am especially excited everyday to work with our cavity interferometer experiment! Outside of lab, I try to enjoy all the sunshine I can get before heading back. 

Jordan Dudley

jdudley [at)

While studying physics and mathematics at CSU East Bay, I joined an atomic physics experiment. As a result, I have become very excited about using this type of experiment to test fundamental physics, especially gravitational effects. I also enjoy backpacking and live music.

Jeremy Axelrod

jaxelrod [at)

I received my B.S. in Engineering Physics at UC Berkeley before continuing at Berkeley as a Physics graduate student. I like atomic, molecular, and optical physics because it is broadly applicable to the development of both practical techniques and fundamental science. I work on the phase contrast electron microscopy project. Outside of lab I enjoy aviation, hiking, skiing, photography, and the hallway.

Me in a tree cropped (2).jpg

Zachary Pagel

zpagel [at)

I received my B.S. from Tufts University where I studied engineering science, physics and math. I love being outside whenever possible, listening to music, cooking, and working on really cool experiments. I'm working with our Mini G experiment to develop a portable interferometer.




Shannon Baucom

shannon.baucom [at)

I am a senior at Berkeley, majoring in Physics. I am working with the
cesium cavity interferometer project, which has been super fun. I am
learning so much and am so excited to be part of this awesome group.
In my free time, I like camping, reading, cooking, sailing, and re-watching Parks and Rec.

Philip Canoza

pcanoza [at)

I am currently pursuing an Engineering Physics B.S. here at Berkeley.  My fascination with quantum physics and electrical engineering began when I was 13, and it is amazing to develop these skills in the Mini-G experiment.  Besides science, I also enjoy long walks on the beach, mangoes, and classical music.



Joyce Kwan

joyce.kwan [at)

I graduated from MIT with B.S. and M.Eng. degrees in electrical engineering and worked at Apple before becoming interested in atomic physics. I work on the atomic fountain for measuring the fine-structure constant.


Sofus Kristensen

sofuslaguna [at)

I am a visiting scholar from the Niels Bohr Institute in Denmark, doing work for my master thesis in experimental quantum physics. I work on the cesium cavity interferometer with a great team of coffee lovers. Outside the lab, my interests are guitar, motorcycle riding, diving and good beer. I especially enjoy the vastly improved weather in Berkeley compared to danish standards.

Robert Berghaus


Former Members

As postdoc or graduate student

Dr. Justin Brown, Scientist at Physical Sciences, Inc. in Andover, MA, USA

Dr. Brian Estey

Professor Paul Hamilton, Assistant Professor of Physics and Astronomy at University of California, Los Angeles

Dr. Michael Hohensee, Staff Scientist at Lawrence Livermore National Laboratory

Professor Geena Kim, Assistant Professor of Computer Science at Regis University

Dr. Pei-Chen Kuan, Postdoc at Nanyang Technologival University in Singapore

Professor Shau-Yu Lan, Assistant Professor of Physics and Applied Physics at Nanyang Technological University in Singapore

Francisco Monsalve, Faculty at Berkeley City College

Erin Sohr, Graduate Student at University of Maryland

Dr. Michelle Xu, Distributed Systems Engineer at Intel in Santa Clara, CA, USA


As undergraduate student

Hunter Akins, SULI intern in geophysics at Lawrence Berkeley National Lab

Loïc Anderegg, Graduate Student at Harvard University

Ryan Bilotta, Graduate Student at Cornell University

Simon Budker, Undergraduate Student at University of California, Santa Cruz

Lizbeth Cazarez, Training Developer at General Atomics Aeornautical Systems in Poway, CA, USA

Cheong Chan, Graduate Student at Georgia Institute of Technology

Tatyana Gavrilchenko, Graduate Student at University of Pennsylvania

Rachel Houtz, Graduate Student at University of California, Davis

Chen Lai, Masters student at University of California, San Diego

Eli Mizrachi, Research Assistant at SLAC National Accelerator Laboratory

Biswaroop Mukherjee, Graduate Student at Massachusetts Institute of Technology

Randy Putnam, Graduate Student at University of California, Los Angeles

Quinn Simmons, Graduate Student at University of California, Santa Barbara

Daniel Tuthill, Graduate Student at Ohio State University


As visiting researcher/scholar

Jiafeng Cui, Graduate Student at Huazhong University in Wuhan, China

Dr. Yanying Feng, Associate Professor of Precision Instruments at Tsinghua University in Beijing, China

Dr. Markus Krutzik, Group Leader at Humboldt University in Berlin, Germany

Lothar Maisenbacher, Researcher at the Max Planck Institute for Quantum Optics in Munich, Germany

Dr. Dennis Schlippert, Postdoc at University of Hannover in Hannover, Germany

Daniel Tiarks, Researcher at the Max Planck Institute for Quantum Optics in Munich, Germany

Anqi Wang, Graduate Student at Tsinghua University in Beijing, China

Fei Zi, Graduate Student at Zhejiang University in Hangzhou, China