Interferometric Single-Shot Parity Measurement in an InAs-Al Hybrid Device
- M. Aghaee ,
- Alejandro Alcaraz Ramirez ,
- Zulfi Alam ,
- Rizwan Ali ,
- Mariusz Andrzejczuk ,
- Andrey Antipov ,
- M. Astafev ,
- Amin Barzegar ,
- Bela Bauer ,
- Jonathan Becker ,
- U. Bhaskar ,
- Alex Bocharov ,
- S. Boddapati ,
- David Bohn ,
- Jouri D. S. Bommer ,
- L. Bourdet ,
- Arnaud Bousquet ,
- Samuel Boutin ,
- Lucas Casparis ,
- Benjamin James Chapman ,
- S. Chatoor ,
- Anna Wulff Christensen ,
- Cassandra Chua ,
- Patrick Codd ,
- William Cole ,
- Paul Cooper ,
- Fabiano Corsetti ,
- Ajuan Cui ,
- Paolo Dalpasso ,
- J. P. Dehollain ,
- Gijs de Lange (gidelang) ,
- M. Moor ,
- Andreas Ekefjard ,
- Tareq El Dandachi ,
- J. C. E. Saldaña ,
- S. Fallahi ,
- L. Galletti ,
- Geoff Gardner ,
- D. Govender ,
- F. Griggio ,
- Ruben Grigoryan ,
- Sebastian Grijalva ,
- Sergei Gronin ,
- Jan Gukelberger ,
- Marzie Hamdast ,
- Firasamine Hamze ,
- Esben Bork Hansen ,
- Sebastian Heedt (seheedt) ,
- Zahra Heidarnia ,
- Jes'us Herranz Zamorano ,
- Samantha Ho ,
- Laurens Holgaard ,
- John Hornibrook ,
- Jinnapat Indrapiromkul ,
- Henrik Ingerslev ,
- Lovro Ivancevic ,
- Thomas Jensen ,
- Jaspreet Jhoja ,
- Jeffrey Jones ,
- Konstantin V. Kalashnikov ,
- Ray Kallaher ,
- R. Kalra ,
- Farhad Karimi ,
- Torsten Karzig ,
- Evelyn King ,
- M. E. Kloster ,
- Christina Knapp ,
- D. Kocoń ,
- J. Koski ,
- P. Kostamo ,
- Mahesh Kumar ,
- T. Laeven ,
- T. Larsen ,
- Jason Lee ,
- Kyunghoon Lee ,
- Grant Leum ,
- Kongyi Li ,
- T. Lindemann ,
- Matthew Looij ,
- J. Love ,
- Marijn Lucas ,
- Roman Lutchyn ,
- Morten Hannibal Madsen ,
- Nash Madulid ,
- Albert Malmros ,
- M. Manfra ,
- Devashish Mantri ,
- S. Markussen ,
- Esteban Martinez ,
- Marco Mattila ,
- R. McNeil ,
- Antonio Rodolph Mei ,
- R. Mishmash ,
- Gopakumar Mohandas ,
- Christian Mollgaard ,
- Trevor Morgan ,
- George Moussa ,
- Dr. Chetan Nayak ,
- Jens Nielsen ,
- Jens Munk Nielsen ,
- William HP Nielsen ,
- B. Nijholt ,
- Mike Nystrom ,
- Eoin O'Farrell ,
- Thomas Ohki ,
- K. Otani ,
- Brian Paquelet Wutz ,
- S. Pauka ,
- Karl Petersson ,
- Luca Petit ,
- D. Pikulin ,
- G. Prawiroatmodjo ,
- F. Preiss ,
- Eduardo Puchol Morejon ,
- Mohana Rajpalke ,
- Craig Ranta ,
- K. Rasmussen ,
- David Razmadze ,
- Outi Reentila ,
- David Reilly ,
- Yuan Ren ,
- Ken Reneris ,
- Richard Rouse ,
- Ivan Sadovskyy (ivsadovs) ,
- L. Sainiemi ,
- I. Sanlorenzo ,
- E. Schmidgall ,
- Cristina Sfiligoj ,
- Mustafeez Bashir Shah ,
- Kevin Simoes ,
- Shilpi Singh ,
- Sarat Sinha ,
- Thomas Soerensen ,
- P. Sohr ,
- T. Stankevič ,
- Lieuwe Stek ,
- Eric Stuppard ,
- H. Suominen ,
- Judith Suter ,
- Sam Teicher ,
- Nivetha Thiyagarajah ,
- R. Tholapi ,
- Mason Thomas ,
- Emily A Toomey ,
- Josh Tracy ,
- Michelle Turley ,
- Shivendra Upadhyay ,
- Ivica Urban ,
- Kevin Van Hoogdalem ,
- David Van Woerkom ,
- D. Viazmitinov ,
- Dominik Vogel ,
- John Watson ,
- Alex Webster ,
- Joseph Weston ,
- Georg Wolfgang Winkler ,
- Di Xu ,
- Chung Kai Yang ,
- Emrah Yücelen ,
- R. Zeisel ,
- Guoji Zheng ,
- Justin Zilke
arXiv
The fusion of non-Abelian anyons or topological defects is a fundamental operation in measurement-only topological quantum computation. In topological superconductors, this operation amounts to a determination of the shared fermion parity of Majorana zero modes. As a step towards this, we implement a single-shot interferometric measurement of fermion parity in indium arsenide-aluminum heterostructures with a gate-defined nanowire. The interferometer is formed by tunnel-coupling the proximitized nanowire to quantum dots. The nanowire causes a state-dependent shift of these quantum dots’ quantum capacitance of up to 1 fF. Our quantum capacitance measurements show flux h/2e-periodic bimodality with a signal-to-noise ratio of 1 in 3.7 $\mu$s at optimal flux values. From the time traces of the quantum capacitance measurements, we extract a dwell time in the two associated states that is longer than 1 ms at in-plane magnetic fields of approximately 2 T. These results are consistent with a measurement of the fermion parity encoded in a pair of Majorana zero modes that are separated by approximately 3 $\mu$m and subjected to a low rate of poisoning by non-equilibrium quasiparticles. The large capacitance shift and long poisoning time enable a parity measurement error probability of 1%.