Quantum 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...

Scientists visualize electron crystals in a quantum superposition

April 11, 2024

two sites of a graphene lattice

Illustration of two sites of graphene lattice. Credit: Image courtesy of the researchers

Princeton scientists are using innovative techniques to visualize electrons in graphene, a single atomic layer of carbon atoms. They are finding that strong interactions between electrons in high magnetic fields drive them to form unusual crystal-like structures similar to...

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...

Bernard Sadoulet

Professor Emeritus

Bernard Sadoulet, a graduate of Ecole Polytechnique (1963) and a “Docteur ès sciences” of Paris-Orsay University (1971), is by training an elementary particle physicist. As such, he had the chance of participating in two prestigious experiments which led to Nobel Prizes: the Mark I experiment at SLAC which discovered the J/ψ, the τ lepton and the charm, and UA1 at CERN which discovered the intermediate vector bosons W and Z. In 1984 he decided to shift his efforts towards particle astrophysics and cosmology. In 1985 he was appointed Professor of Physics at the University of California,...

Divide and conquer: improving an atomic clock by splitting it up

January 24, 2024

diagram showing the science behind the dividing of an atomic clock

In a paper recently published by the Physics Review, Shimon Kolkowitz and team explain how an atomic clock can be improved by splitting it up

Thanks to their remarkable precision and accuracy, optical atomic clocks are rapidly advancing the frontiers of timekeeping...

James Analytis


James Analytis joined the faculty in January 2013 as the Charles Kittel Chair in condensed matter physics, and served as Department Chair from 2020-2023. He received his B.Sc. in physics from Canterbury University in 2001 and his D. Phil. from the University of Oxford as a Rhodes' Scholar in 2006. At Oxford, he worked with Stephen Blundell and Arzhang Ardavan on experimental and computational studies of quasi-two dimensional organic superconductors. Following his graduate studies, Analytis was a Lloyd's Tercentenary Fellow at the University of Bristol, where he worked 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...