Higginbotham Group

Condensed Matter and Quantum Circuits

Quantum systems are fragile, constantly being altered and disrupted by their environment. The Higginbotham group investigates electronic devices that are exceptions to this rule, aiming to understand the basic principles of their operations and develop future information-processing technology.


Research in Higginbotham’s group experimentally explores the relationship between condensed matter systems and information processing. In practice, the group builds devices with topological superconductors, quantum dots and quantum-critical matter, and seeks to understand their behavior using electrical transport, superconducting microwave circuits and electromechanical oscillators. The central idea of our approach is that building rudimentary information-processing devices both teaches us about the physics of these interesting systems and advances technology such as quantum computing. Currently, the group is interested in using electromechanical and microwave measurement techniques to study quantities that are “invisible” to conventional electrical transport experiments. On the electromechanics side, ultra-high-Q mechanical oscillators are being built to study dynamics and quantum coherence in insulating phases of matter. On the microwave side, wide-band and low noise receiver chains are being constructed to perform fundamental studies on the electrical properties of superconductor-semiconductor heterostructures, which harbor poorly understood superconducting, metallic and—possibly—topological phases.

Group Leader


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Team


Current Projects


Publications

Ménard GC, Anselmetti GLR, Martinez EA, Puglia D, Malinowski FK, Lee JS, Choi S, Pendharkar M, Palmstrøm CJ, Flensberg K, Marcus CM, Casparis L, Higginbotham AP. 2020. Conductance-matrix symmetries of a three-terminal hybrid device. Physical Review Letters. 124(3), 036802. View

Danon J, Hellenes AB, Hansen EB, Casparis L, Higginbotham AP, Flensberg K. 2020. Nonlocal conductance spectroscopy of Andreev bound states: Symmetry relations and BCS charges. Physical Review Letters. 124(3), 036801. View

Anselmetti GLR, Martinez EA, Ménard GC, Puglia D, Malinowski FK, Lee JS, Choi S, Pendharkar M, Palmstrøm CJ, Marcus CM, Casparis L, Higginbotham AP. 2019. End-to-end correlated subgap states in hybrid nanowires. Physical Review B. 100(20), 205412. View

Higginbotham AP, Burns PS, Urmey MD, Peterson RW, Kampel NS, Brubaker BM, Smith G, Lehnert KW, Regal CA. 2018. Harnessing electro-optic correlations in an efficient mechanical converter. Nature Physics. 14(10), 1038–1042. View

Rosenthal EI, Ehrlich NK, Rudner MS, Higginbotham AP, Lehnert KW. 2018. Topological phase transition measured in a dissipative metamaterial. Physical Review B. 97(22), 220301. View

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Career

since 2019 Assistant Professor, IST Austria
2017-2019 Researcher, Microsoft Station Q Copenhagen
2015-2017 Postdoctoral research, JILA: NIST and CU Boulder
2010-2015 Ph.D., Harvard University
2009-2010 M.Phil., Cambridge University
2005-2009 B.Sc., Harvey Mudd College


Selected Distinctions

2016 National Research Council Postdoctoral Fellowship
2010 D.O.E. Office of Science Graduate Fellowship
2009 A.P.S. Apker Award Finalist
2009 Churchill Foundation Scholarship, Cambridge, UK


Addtional Information

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View Higginbotham Lab website



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