Team Members
ZLab Team
Tanya Zelevinsky
Prof. Tanya Zelevinsky

Prof. Z graduated from MIT in physics and math, and received her physics PhD at Harvard University where her thesis work involved precise spectroscopy of helium atoms. She came to Columbia in 2008, after a few years of learning about optical lattice atomic clocks in Boulder, Colorado. She teaches various subjects such as mechanics, electromagnetism, and atomic physics, and her research interests involve precision measurements and quantum optics, particularly state-of-the-art optical spectroscopy with diatomic molecules.

Stanimir Kondov
Stan Kondov

Stan is an experienced ultracold atom trapper who graduated from the University of Arkansas and earned his physics PhD at the University of Illinois. His PhD thesis centered on ultracold fermionic atoms in optical lattices and disordered potentials. He then worked at Princeton, again on the interface of atomic and condensed matter physics. There he focused on quantum simulations of strongly correlated electrons, using dilute fermionic gases with imbalanced spin populations. At ZLab, Stan has transitioned to diatomic molecular physics and optical-lattice-clock style spectroscopy. As one of his initial projects, he has integrated an optical frequency comb into the molecular clock experiment to probe the mass dependence the van der Waals force between pairs of spinless atoms.

Ivan Kozyryev
Ivan Kozyryev

Ivan grew up in a small town in Ukraine and subsequently studied physics and applied math at Yale University. Excited about "table-top" particle physics, as an undergraduate he worked on measuring the electron's electric dipole moment as part of the Harvard-Yale ACME Collaboration. For his applied math senior thesis he worked on bioinformatics of autoimmune diseases. As a PhD student at Harvard, Ivan demonstrated a novel method for trapping of molecular radicals using superconducting magnets. Intrigued by the prospects of direct laser cooling for molecules, he developed laser cooling and trapping methods for polyatomic molecules. At Columbia, he is applying his experience in molecular laser cooling to diatomic hydride molecules in order to diversify ultracold molecular species and potentially produce ultracold hydrogen samples for precision spectroscopy and ultracold chemistry.

Chih-Hsi Lee
Chih-Hsi Lee

Chih-Hsi received his undergraduate physics degree from the National Taiwan University in 2013 and completed military service in 2014, shortly before coming to Columbia for his PhD studies. For a long time he had been interested in quantum optics and ultracold atom physics. At ZLab, after a brief training period by Bart McGuyer and Mickey McDonald, he quickly embarked on the strontum ultracold-molecule experiment on his own. This is no easy feat, given the need to tame a UHV system, a dozen separate (but phase-locked) lasers, and a frequency comb. Chih-Hsi's plans for the near future involve high-precision spectroscopy of the ground-state vibrational levels in spinless strontium molecules and its applications to possible new fundamental physics.

Konrad Wenz
Konrad Wenz

Konrad graduated from the University of Warsaw where he was interested in theoretical astrophysics, including black holes and dark matter. Besides astrophysics, he likes thinking about biophysics, data science, and table-top precision measurements. Konrad is a member of CENTREX (Cold Molecule Nuclear Time Reversal Experiment) which is a collaboration between Yale, Columbia, and University of Massachusetts. The experiment aims to achieve the highest sensitivity to the nuclear Schiff moment arising from a slight charge asymmetry in the nucleus, using diatomic polar molecules. An observation of this asymmetry would strongly point to new time-reversal symmetry violating particles beyond the Standard Model. Konrad is focusing on the optical systems and quantum manipulations of the molecules.

Rees McNally
Rees McNally

Rees graduated from the University of Colorado - Boulder in 2015. He became interested in science and engineering after visiting an arospace lab and getting involved in a satellite project, particulary collecting and processing data from the satellite. This was followed by other research projects, including one on the world's best atomic clock at JILA. As a graduate student at Columbia, Rees has received a National Science Foundation IGERT fellowship in optical sciences. Rees is focusing on generating a cryogenic beam of diatomic molecules, and demonstrating laser slowing and cooling properties with a new molecular species.

Kon Leung
Kon Leung

Before coming to Columbia, Kon completed his undergraduate studies at Imperial College London, where he was active within the Quantum Optics and Laser Science group. At ZLab, he is interested in developing high-precision lattice-clock spectroscopy of ultracold molecules and their applications to fundamental physics questions, such as whether there are deviations from Newtonian gravity at the nanometer length scale. He is working to improve the vibrational molecular clock by extending the coherence time of vibrational qubits in an optical lattice.

Joanna Cohen

Joanna is a Columbia undergraduate physics student. Currently she is working on the CeNTREX collaboration experiment and mentoring high school students.

Aaron Liberman

Aaron is an undergraduate physics major at Columbia. He is improving electronics designs for the molecular clock experiment.

Edita Bytyki

Edita is majoring in applied physics at Columbia. She is improving optical imaging techniques for the molecule cooling experiment.

Name Affiliation Project(s)
Chris Liedl Ludwig Maximilian University of Munich Molecular lattice clock
Michel Sidemion Success Academy High School of the Liberal Arts Cavendish balance
Moctar Fall Success Academy High School of the Liberal Arts Cavendish balance
Geoffrey Iwata Columbia University Cryogenic molecular beam and cold molecule optical spectroscopy
Alex Sandomirsky Columbia University Electronics and high school student mentoring
Sam Quinn Columbia University Hands-on mentoring of high school students
Paul Pouyanne Ecole Normale Supérieure Thermal molecule production
Annie Block Columbia University Nested-trash-can oven
Tom Miller Columbia University Electronics
Mickey McDonald Columbia University Ultracold chemistry and molecules in optical lattices
Albert Law Columbia University Electrostatic guiding of polar molecules
Leïla Abbih Ecole Normale Supérieure de Cachan Molecular beam production and optimization
Dr. Bart McGuyer Columbia University Precision measurements with ultracold molecules
Dr. Marco Tarallo Columbia University Production and spectroscopy of cold molecules
Dr. Andrew Grier Columbia University Frequency combs for molecular spectroscopy
Fabian Sörensen Technische Universität Darmstadt Nonlinear optics
Florian Apfelbeck Ludwig-Maximilians University Ultracold molecule photodissociation
Damon Daw Columbia College Laser stabilization
Cole Rainey Columbia College Laser stabilization
Katérina Verteletsky Ecole Normale Supérieure de Cachan Molecular spectroscopy
Dr. André Loose Columbia University ATTA
Matthew Miecnikowski Columbia College Optical beam control
Noel Wan Columbia College Optics and electronics
Jiyoun (Jennifer) Ha Tenafly High School Visible optical beats
Dr. Chris Osborn Columbia University PhD thesis (2013)
Dr. Taehyun Yoon Columbia University PhD thesis (2013)
Omeed Maghzian Columbia College Experiment control software
Elijahu Ben-Michael Columbia College Molecule cooling; optics
Henry Du Hunter College High School Web design
Dr. Gael Reinaudi Columbia University Ultracold atom & molecule experiments
Dili Wang Columbia College Lasers and optics; undergraduate thesis
Clio Sleator Columbia College Experiment control software
Dr. Klejda Bega APS Blewett Scholar Laser setup and stabilization
Stéphane Bonnotte l'Institut d'Optique Thermal radiation and clocks
Camille Frapolli Ecole Normale Superieure de Cahcan Nonlinear optics
Paul Lintilhac Dartmouth College Optics; interferometry
Michael Rubin Columbia School of Engineering Magnetic field modeling
Jonathan Jove New Rochelle High School Experiment control electronics
Siqing Yu Columbia College Experiment control electronics
Raanan Cohen Columbia School of Engineering Experiment control electronics
Paul Mueller Columbia School of Engineering Laser cavity design
David Tam Columbia College Laser stabilization; temperature control
Nathan Smith Bard College Vibration measurements