Atomic, Molecular & Optical Physics Experimentalist

Alp Sipahigil

Assistant Professor

Alp Sipahigil is the Ping & Amy Chao Family Assistant Professor of Electrical Engineering and Computer Sciences at the University of California, Berkeley. He has joint appointments as a Faculty Scientist at the Materials Sciences Division at Lawrence Berkeley National Laboratory and a supporting appointment at UC Berkeley Physics.

He leads the Berkeley Quantum Devices Group which focuses on solid-state device research to advance quantum computation, communication and sensing. His group studies a wide range of physical systems including superconducting quantum circuits, color...

Holger Mueller


Holger Müller successfully applied for his first patent when he was 14. Later, he did his undergraduate thesis with Jürgen Mlynek at the University of Konstanz, Germany. He graduated from Humboldt-University, Berlin, with Achim Peters as his advisor. Müller received a fellowship of the Alexander von Humboldt foundation and joined the group of Steven Chu in Stanford as a postdoc. In July 2008, he joined the physics faculty at U.C. Berkeley.

Research Interests

Our research has been advancing atomic, molecular and optical physics to probe nature at the utmost sensitivity. Examples are...

Hartmut Haeffner


Hartmut Häffner received his PhD in physics from the University of Mainz / Germany in 2000. After short periods as a Postdoctoral fellow in Mainz and Bangalore/India, he received a Feodor-Lynen fellowship from the Alexander-von-Humboldt foundation Germany and went to NIST / Gaithersburg as a guest researcher (2000-2001). In 2001 he moved to the University of Innsbruck / Austria as a university assistant where he held a Marie-Curie fellowship from the European Union from 2002 - 2004. From 2004 till 2009 he worked as senior scientist at the Institute for Quantum Optics and Quantum...

Shimon Kolkowitz

Associate Professor and Herst Chair in Physics

Shimon Kolkowitz is an atomic physicist and quantum scientist, with his experimental research focusing on quantum sensing, precision measurement, and metrology. Shimon’s research group has pioneered new techniques and applications for ultra-precise optical atomic clocks, and new measurement tools that make use of atom-scale defects in diamond. Shimon was an undergraduate at Stanford University, graduating with distinction in 2008 with a B.S. in Physics. Shimon earned his PhD in experimental physics at Harvard in 2015 with advisor Professor Mikhail Lukin, where his research focused on...

Feng Wang


Feng Wang received a B.A. from Fudan University, Shanghai, in 1999 and a Ph.D. from Columbia University in 2004. From 2005-2007, he has been a Miller Fellow with Miller Institute for Basic Science at Berkeley. He joined the physics faculty in fall, 2007.

Research Interests

We are interested in light-matter interaction in condensed matter physics, with an emphasis on novel physical phenomena emerging in nanoscale structures and at surfaces/interfaces. When electrons and phonons are confined in nanometer scale or at surface/interfaces, they respond differently to external stimuli. We...

Eric Y. Ma

Assistant Professor

Eric Y. Ma received his B.S. in Physics from Peking University in 2010 and his Ph.D. in Applied Physics from Stanford University in 2016. He stayed at Stanford as a joint postdoctoral scholar in Applied Physics and Electrical Engineering. He was also briefly Senior Scientist at Apple. In July 2021 Dr. Ma joined UC Berkeley full-time as Assistant Professor in Physics and by courtesy EECS, and currently holds the Georgia Lee Chair in Physics.

Research Interests

Most practical phenomena, except those related to nuclear reactions, can be well described by atomic nuclei and electrons...

Stephen Leone

The John R. Thomas Professor in Physics

Dr. Leone received his B.A. in Chemistry at Northwestern University in 1970 and his Ph.D. in Chemistry at the University of California at Berkeley with Professor C. Bradley Moore in 1974. He was an assistant professor at the University of Southern California from 1974-76. He assumed a position with NIST and the University of Colorado in 1976 and became a full professor in 1982. Dr. Leone was a Fellow and staff member of the National Institute of Standards and Technology, a Fellow of JILA, as well as an Adjoint Professor of Chemistry and Biochemistry and a Lecturer of Physics at the...

Dan Stamper-Kurn


Dan M. Stamper-Kurn came to Berkeley following his studies at the Massachusetts Institute of Technology (Ph.D. 2000) and postdoctoral work at the California Institute of Technology (1999 – 2001). He is the recipient of the 2000 APS Division of Atomic, Optical and Molecular Physics Outstanding Thesis award, the Alfred P. Sloan Fellowship (2001 – 2003), the David and Lucile Packard Fellowship in Science and Engineering (2002 – 2007), and the Presidential Young Investigator Award in Science and Engineering (2002). He holds the Class of 1936 Second Chair in the College of Letters and Sciences...

Antimatter embraces Earth, falling downward like normal matter

September 28, 2023

Antimatter falling through a tube-like structure

Antihydrogen atoms (blue) fall inside a magnetic trap and annihilate in an experiment to measure the effects of gravity on antimatter.

For those still holding out hope that antimatter levitates rather than falls in a gravitational field, like normal matter, the results of a new experiment are a dose of cold reality.

Physicists studying...

Naomi Ginsberg


Naomi S. Ginsberg is an Associate Professor of Chemistry and Physics at the University of California, Berkeley, and a Faculty Scientist in the Materials Sciences and Molecular Biophysics and Integrated Imaging Divisions at Lawrence Berkeley National Laboratory, where she has been since 2010. She currently focuses on elucidating the electronic and molecular dynamics in a wide variety of soft electronic and biological materials by devising new electron and optical imaging modalities that enable characterization of fast and ultrafast processes at the nanoscale and as a function of their...