Accès ouvert déclaré
2024
preprint
Interferometric Single-Shot Parity Measurement in an InAs-Al Hybrid Device
Morteza Aghaee, Alejandro Alcaraz Ramirez, Zulfi Alam, Rizwan Ali, Mariusz Andrzejczuk, Andrey E. Antipov, Mikhail A. Astafev, Amin Barzegar, Bela Bauer, Jonathan Becker, Umesh Kumar Bhaskar, Alex Bocharov, Srini Boddapati, David Bohn, Jouri D. S. Bommer, L. Bourdet, A. Bousquet, Samuel Boutin, Lucas Casparis, Ben Chapman, Sohail Chatoor, Anna Wulff Christensen, Cassandra Chua, Patrick Codd, William S. Cole, Paul A. Cooper, Fabiano Corsetti, Ajuan Cui, Paolo Dalpasso, Juan Pablo Dehollain, G. de Lange, Michiel de Moor, Andreas Ekefjärd, Tareq El Dandachi, Juan Carlos Estrada Saldaña, Saeed Fallahi, Luca Galletti, G. C. Gardner, Deshan Govender, Flavio Griggio, Ruben Grigoryan, Sebastián Grijalva, Sergei Gronin, Jan Gukelberger, Marzie Hamdast, Firas Hamze, Esben Bork Hansen, Sebastian Heedt, Zahra Heidarnia, Jesús Herranz Zamorano, Samantha Ho, Laurens Holgaard, J. M. Hornibrook, Jinnapat Indrapiromkul, Henrik Ingerslev, Lovro Ivancevic, Jaspreet Jhoja, Jeffrey S Jones, K. V. Kalashnikov, Ray Kallaher, Farhad Karimi, Torsten Karzig, Maren Elisabeth Kloster, Christina Knapp, Dariusz Kocoń, Jonne Koski, Pasi Kostamo, Mahesh Kumar, Tom Laeven, T. W. Larsen, JASON KAI WEI LEE, Kyunghoon Lee, Grant Leum, Kongyi Li, Tyler Lindemann, Matthew Looij, Julie Love, Marijn Lucas, Roman M. Lutchyn, Morten Hannibal Madsen, Nash Madulid, Albert Malmros, Michael J. Manfra, Devashish Mantri, Signe Brynold Markussen, Esteban Martínez, Marco Mattila, Robert I. McNeil, Antonio Rodolph Mei, Ryan V. Mishmash, Gopakumar Mohandas, Christian Mollgaard, Trevor James Morgan, George Moussa, Chetan Nayak, Jens Hedegaard Nielsen, Jens M. Nielsen, William Hvidtfelt Padkær Nielsen, Bas Nijholt, Mike Nystrom, Eoin O’Farrell, Thomas Ohki, Keita Otani, Brian Paquelet Wütz, Sebastian Pauka, Karl D. Petersson, Luca Petit, Dima Pikulin, Guen Prawiroatmodjo, Frank Preiss, Mohana Krishnappa Rajpalke, Craig Ranta, Katrine Laura Rasmussen, David Razmadze, O. Reentilä, D. J. Reilly, Yuan Ren, Ken Reneris, Richard H. Rouse, Ivan Sadovskyy, Lauri Sainiemi, Irene Sanlorenzo, Emma Schmidgall, Cristina Sfiligoj, Mustafeez Bashir Shah, Kevin Simoes, Shilpi Singh, Sarat Sinha, Thomas Soerensen, Patrick Sohr, Tomaš Stankevič, Lieuwe Stek, Eric Stuppard, Henri J. Suominen, Judith Suter, Sam Teicher, Nivetha Thiyagarajah, Raj Tholapi, Mason Thomas, Emily Toomey, Josh Tracy, Michelle Turley, Shivendra Upadhyay, Ivan J. A. Urban, Kevin Van Hoogdalem, David J. van Woerkom, Dmitrii V. Viazmitinov, Dominik Vogel, John Watson, Alex J. Webster, Joseph Weston, Georg W. Winkler, Chung Kai Yang, Emrah Yücelen, R. Zeisel, Guoji Zheng, Justin Zilke
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Le résumé fourni par la source
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 $μ$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 $μ$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%.
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Les sujets associés
Topological Materials and PhenomenaQuantum and electron transport phenomenaCold Atom Physics and Bose-Einstein Condensates