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Members

Qulab 2021

Top left – Bottom right: Rodrigo Cortiñas, Xu Xiao, Wei Dai, Ioannis Tsioutsios, Akshay Koottandavida, Gangqiang Liu, Benjamin Brock, Andy Ding, Pavel Kurilovich, Nick Frattini, Spencer Diamond, Alec Eickbusch, Zhixin Wang, Heekun Nho, Vladimir Sivak, Alessandro Miano, Cassady Smith, Jaya Venkatraman, Vidul Joshi, Michel Devoret, Valla Fatemi, Luigi Frunzio, Tom Connolly


Principal Investigator

Michel H. Devoret

Permanent Staff

Luigi Frunzio, senior research scientist

Giselle Maillet, administrative associate

Theresa Evangeliste, administrative assistant

Nuch Graves, program coordinator

Other Applied Physics Staff

Maria Rao, administrative assistant

Michael Rooks, YINQE director of facilties

Yong Sun, cleanroom director

Visiting Scientists

Alessandro Miano

Graduate students

Xu Xiao

Alumni

Baleegh Abdo (postdoc); Nicolas Bergeal (postdoc); Etienne Boaknin (postdoc); Markus Brink (postdoc); Philippe Campagne-Ibarcq (postdoc); Simon Fisette (undergrad); Alvin Gao (undergrad); Kurtis Geerlings (student); Alexander Grimm (postdoc); Michael Hatridge (postdoc); Max Hays (student); Benjamin Huard (visiting scientist); Archana Kamal (student); Philippe Hyafil (postdoc); Angela Kou (postdoc); Gijs de Lange (postdoc); Zaki Leghtas (postdoc); Andrew Lingenfelter (undergrad); Yehan Liu (student); Vladimir Manucharyan (student); Adam Marblestone (undergrad); Nick Masluk (student); Zlatko Minev (student); Shantanu Mundhada (student); Anirudh Narla (student); Chris Pang (undergrad); Frederic Pierre (postdoc); Ioan Pop (postdoc); Chad Rigetti (student); Flavius Schackert (student); Kyle Serniak (student); Irfan Siddiqi (postdoc); Katrina Sliwa (student); Clarke Smith (student); Steven Touzard (student); Rajamani Vijayaraghavan (student); Uri Vool (student); Chris Wilson (postdoc); Evan Zalys-Geller (student); William Zeng (undergrad);


Michel H. Devoret
phone : 203-432-4273

Michel Devoret graduated from Ecole Nationale Superieure des Telecommunications in Paris in 1975 and started graduate work in molecular quantum physics at the University of Orsay. He then joined Professor Anatole Abragam’s laboratory in the Commissariat a l’Energie Atomique (CEA) at Saclay to work on nuclear magnetic resonance in solid hydrogen, and received his PhD from Paris University in 1982. Subsequently, he spent two post-doctoral years working under Prof. John Clarke’s guidance at the University of California, Berkeley, with John Martinis, who was a PhD student at that time. In a series of experiments, the trio showed that a Josephson tunnel junction could, under a controlled microwave environment, behave as an artificial atom “with wires”, the basis of what is now known as a superconducting quantum bit. Michel Devoret pursued this research on quantum mechanical electronics upon his return to Saclay, starting his own group with Daniel Esteve and Cristian Urbina. The main achievements of the “quantronics group” in this period of his career were the measurement of the traversal time of tunneling, the invention of the single electron pump, the first measurement of the effect of atomic valence on the conductance of a single atom, and the first observation of the Ramsey fringes of a superconducting artificial atom named quantronium. He was promoted director of research at CEA-Saclay in 1995 and in 2002 he joined Yale University as a full professor. In 2007, Michel was appointed to the College de France. He gave there every year new cycles of lectures on quantum mesoscopic physics until 2012.
Currently the F. W. Beinecke Professor of Applied Physics at Yale University – where he has taught and led a research group for the last 20 years – he focuses his research on experimental solid-state physics with emphasis on quantum information processing. In the new type of electronics his lab develops, not only electrical collective degrees of freedom like currents and voltages behave quantum mechanically, but single microwave photons can be made to interact controllably with artificial atoms. Such mesoscopic processes are particularly important in quantum circuits based on Josephson tunnel junctions combined with superconducting resonators, which are now viewed as one of the main platforms for the implementation of quantum information processors. Michel has contributed, in collaboration with his Yale colleagues Rob Schoelkopf, Leonid Glazman and Steven Girvin, to the invention of two new artificial superconducting atoms, the transmon and the fluxonium. Also, after having developed new types of amplifiers reaching the quantum limit, he employed them to determine the fundamental back-action of measurements. In particular, Michel’s team showed that it was possible to stop a quantum jump in its flight and reverse it. He currently investigates the new phenomena of quantum error correction and fault-tolerant quantum operation. With his team he recently realized the full quantum error correction of a superconducting qubit.
Michel Devoret is a member of the American Academy of Arts and Sciences (2003) and a member of the French Academy of Sciences (2008). Michel has received the Ampere Prize of the French Academy of Science (together with Daniel Esteve, 1991), the Descartes-Huygens Prize of the Royal Academy of Science of the Netherlands (1996) and the Europhysics-Agilent Prize of the European Physical Society (together with Daniel Esteve, Hans Mooij and Yasunobu Nakamura, 2004). He is also a recipient of the John Stewart Bell Prize, which he received jointly with Rob Schoelkopf in 2013. In 2014, together with John Martinis and Rob Schoelkopf, he was awarded, the Fritz London Memorial Prize. He received the Olli Lounaasma Prize in 2016.


Luigi Frunzio
phone : 203-432-4273

Luigi received his Masters in Physics at Federico II University in Naples, Italy, earning 110/110 Cum Laude. His thesis studied the effects of the intrinsic fluctuations in current biased Josephson tunnel junctions, and his preliminary work took place at the Superconductivity Department of the Instituto di Cibernetica of the CNR under the supervision of Professors Arturo Tagliacozzo and Roberto Cristiano. He also has a PhD from Orsay University. Luigi is currently a Senior Research Scientist at the Department of Applied Physics at Yale University. He works jointly with Prof. Devoret and Prof. Schoelkopf on experiments involving superconducting qubits. His curriculum vitae is available here


Giselle Maillet Administrative Associate

Yale University, Applied Physics
15 Prospect Street / PO Box 208284
Becton Center 401
New Haven, CT 06520-8284
phone : 203-432-9654

 

 

 


Theresa Evangeliste Administrative Assistant

Yale University, Applied Physics
15 Prospect Street / PO Box 208284
Becton Center 401
New Haven, CT 06520-8284
phone : 203-432-2210

 

 

 


Nuch Graves Program Coordinator/Financial Analyst

Yale University, Applied Physics
15 Prospect Street / PO Box 208284
Becton Center 401
New Haven, CT 06520-8284
phone : 203-432-9610


Maria Rao Administrative Assistant
Yale University, Applied Physics
15 Prospect Street / PO Box 208284
Becton Center 401
New Haven, CT 06520-8284
phone : 203-432-4273

Maria lives in Branford, CT and has worked at Yale since 2004. She comes from Bayer Pharmaceutical Corp. with solid corporate experience. She has a teaching degree in foreign languages (Italian, French, and Spanish) from Southern Connecticut State University. She is our awesome administrative assistant. Young, energetic, and dynamic, she gets us all the tools and research equipment we want and takes care of all the paperwork involved – with a smile that’s always appreciated.


Rodrigo Cortiñas

Rodrigo was born and raised in Lomas de Zamora, a suburb of the Argentine capital. He studied Physics at the University of Buenos Aires, where his final undergrad project was on single optical photon quantum optics in the LOFT lab (Claudio Iemmi). He then moved to Paris, France to work in the cavity QED team of the LKB lab (Serge Haroche, Jean-Michel Raimond, and Michel Brune) on the development of Rydberg atoms technology for quantum simulation. They were the first team to laser trap circular Rydberg atoms (and for >10ms!), an achievement for which Rodrigo was awarded a PhD in atomic physics from the ENS (PSL). He then moved to Yale and joined Qlab to work on quantum error correction in circuit QED. Rodrigo is interested in the fundamental aspects of quantum mechanics and how to harvest them.


Valla Fatemi

Valla was born in Atlanta, GA. After studying applied physics at Columbia University, he completed a PhD in physics at the Massachusetts Institute of Technology. His thesis work was on the study of atomically layered topological insulators like monolayer tungsten ditelluride, and he also worked on van der Waals heterostructures like twisted bilayer graphene. He joined Qlab in the summer of 2018 to work on microwave spectroscopy and manipulation of Andreev bound states as well as experiments to understand quasiparticle dynamics in transmon qubits.


Gangqiang Liu

Gangqiang was born and grew up in the beautiful countryside of Chengdu, China. In 2008, he received his BA in physics from Wuhan University in Wuhan, China. In 2015, he received his Ph.D in physics for studying Bose-Einstein condensation of quasi-particles in semiconductor microcavities under the supervision of Prof. David Snoke at the University of Pittsburgh. From 2015 to 2018, he worked as a postdoc in Prof. Michael Hatridge’s lab at Pittsburgh, where he studied Josephson parametric amplifiers and qubit readout with two-mode squeezed light. He joined Qlab in December of 2018 to work on directional parametric amplifiers.


Alessandro Miano

Alessandro Miano received a M.Sc in Electronics Engineering in 2017 with a thesis on ferromagnetic Josephson junctions for memory applications. He is currently a Ph.D student in Physics at University of Naples “Federico II”. He joined Qulab in 2019 as a Visiting Assistant in Research, working on the enhancement of Josephson nonlinearities tunability in SNAIL Parametric Amplifiers.


Ioannis Tsioutsios

Ioannis Tsioutsios was born and grew up in Athens, Greece. He studied applied physics and mathematics at the National Technical University of Athens (NTUA), Greece, and electrical and electronics engineering at Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland. He completed his Ph.D in physics in the group of Prof. Adrian Bachtold at the Institute of Photonic Sciences (ICFO) in Barcelona, Spain, where he investigated the properties of nanomechanical resonators based on graphene and carbon nanotubes. He joined Qulab as a postdoctoral associate in August of 2017 and he is currently working on improving the energy relaxation properties of superconducting qubits using novel nanofabrication technologies.


Nick Frattini

Nick grew up in Los Altos, California. He graduated in 2015 from UC Berkeley with a BS in Engineering Physics and in Electrical Engineering and Computer Science. While there, he worked in Irfan Siddiqi’s Quantum Nanonelectronics Laboratory on microwave superconducting circuits. Since joining Qulab in the summer of 2015, he has been investigating novel quantum-limited parametric amplifiers.


Wei Dai

Wei was born in Shanghai, China. He received his undergraduate degree in physics from Tsinghua University in Beijing. At Tsinghua, he worked with Luyan Sun on superconducting microwave cavity design and Purcell filtering of cQED systems. During the summer of 2017, he worked on in-fridge infrared shielding during an internship with Adrian Lupascu at University of Waterloo. Wei joined Qulab in the fall of 2018. His current study focuses on quantum-limited parametric amplifiers based on SNAILs.


Spencer Diamond

Spencer was born in Amherst, Massachusetts. In 2014, he received his BA in Physics from Dartmouth College. He taught high school Physics for three years before beginning his PhD studies and joining QuLab in the fall of 2017. He currently works on experiments probing quasiparticle dynamics in transmon qubits.


Alec Eickbusch

Alec grew up in Austin, Texas. He attended the University of Texas at Austin where he received B.S. degrees in Electrical Engineering and Physics. While at UT, Alec worked in the Raizen Lab studying graphene oxide. In summer 2017 Alec joined Qulab, and he is currently working on quantum error correction for superconducting cavities.


Akshay Koottandavida

Akshay was born in Kerala, India. He received his Bachelors and Masters in Physics from UM DAE- CEBS. He worked on nonreciprocal optomechanical devices using superconducting circuits for his masters thesis under Tobias Kippenberg at EPFL. He also worked on topological phenomena in open quantum chains under Franco Nori at RIKEN, Tokyo and before that he interned at Wolfram Research. Akshay joined QLab in the fall of 2018. His current work focuses on quantum error correction using pair-cats.


Vladimir Sivak

Vladimir was born in western Ukraine and finished Ukrainian Physics and Mathematic Lyceum in Kiev receiving a silver medal at International Physics Olympiad in 2012. He studied theoretical physics in Russia at Moscow Institute of Physics and Technology and graduated in 2016. Vladimir joined Qulab in the summer of 2017 and currently works on SNAIL parametric amplifier.


Jaya Venkatraman

Jaya grew up in Bangalore, India. In 2016, she received her BS degree in Physics from Indian Institute of Technology, Kanpur. While there, she worked with Anand Kumar Jha on characterizing spatial coherence in spontaneous parametric down conversion. During an internship with Alexandre Blais at Sherbrooke in 2015, she worked on using optimal control theory for fast resonator reset. She joined Qulab in the fall of 2016 and is currently working on theory and experiments to investigate dynamical instabilities that occur in driven superconducting circuits.


Zhixin Wang

Zhixin was born and raised in China. He received his Bachelor degree in Microelectronics from Tsinghua University at Beijing in 2015. While at Tsinghua, he studied quantum optics and quantum information theory, and later worked on growth and characterization of topological insulators. In Fall 2013, he was an UCEAP exchange student at University of California, Santa Barbra, pursued non-degree study in Physics, and investigated quantum transport in superconductor-semiconductor mesoscopic heterostructures. In the summer of 2014, he was a visiting student in research at the Department of Applied Physics, Yale University, working on theoretical optics, and attempting the broadband generalization of coherent perfect absorbers (CPA). Since joining Qlab in the fall of 2015, he has been investigating superconductor-semiconductor nanowire hybrid quantum circuits and cold microwave cavity attenuators.


Xu Xiao

Xu grew up in Beijing, China. He received his B.A. degree in physics from the University of Chicago in 2014. While at UChicago, he worked with David Schuster and David Awschalom on NV-centers. He joined Qulab in the summer of 2017. His current work involves investigating the instabilities of driven transmons by modifying the circuit’s phase potential with an inductive shunt.


Vidul Joshi

Vidul grew up in the cities of Nasik and Pune, India. In 2018 he graduated with a BS-MS dual degree in Physics from Indian Institute of Technology Kanpur. For his Master’s thesis he worked on improving the bandwidth of Josephson Parametric Converters, a class of Josephson parametric amplifiers used for superconducting qubit readout, with Dr. R. Vijayaraghavan at TIFR, Mumbai. He joined Qulab in the fall of 2018 and is now working on improving the power handling capacity and bandwidth of the SNAIL parametric amplifier.


Cassady Smith

Cassady was born and raised in Las Vegas, Nevada and received her BA in Physics from Whittier College in 2020. During an internship in 2019, she studied optical properties of thin-film mirror coatings for gravitational wave detectors at the University of Glasgow. Before starting her PhD at Yale, she worked for a year in the Atomic Clocks Technologies group at The Aerospace Corporation.


Heekun Nho

Heekun was born in Minneapolis, Minnesota but grew up near Seoul, Korea. In 2021, he received his BS in Electrical and Computer Engineering from Seoul National University. While there, he worked on the design of superconducting resonators. In 2019, He also worked on developing 3d Rydberg atom systems in KAIST. He is currently working on quasiparticle dynamics in transmons.