Noise-resilient edge modes on a chain of superconducting qubits
Xiao Mi, Michael Sonner, M. Y. Niu, Kenny Lee, Brooks Foxen, Rajeev Acharya, I. L. Aleǐner, T. I. Andersen, Frank Arute, Kunal Arya, Abraham Asfaw, Juan Atalaya, Joseph C. Bardin, Joao Basso, Andreas Bengtsson, Gina Bortoli, Alexandre Bourassa, L. Brill, Michael Broughton, Bob B. Buckley, David A. Buell, Brian Burkett, Nicholas Bushnell, Z. Chen, B. Chiaro, Roberto Collins, P. Conner, William Courtney, Alexander L. Crook, Dripto M. Debroy, Sean Demura, A. Dunsworth, Daniel Eppens, Catherine Erickson, Lara Faoro, Edward Farhi, Reza Fatemi, L. Flores, Ebrahim Forati, Austin G. Fowler, William Giang, Craig Gidney, D. Gilboa, Marissa Giustina, Alejandro Grajales Dau, Jonathan A. Gross, Steve Habegger, Matthew P. Harrigan, M. R. Hoffmann, Sabrina Hong, Trent Huang, Ashley Huff, William J. Huggins, L. B. Ioffe, Sergei V. Isakov, Justin Iveland, E. Jeffrey, Jiang Zhang, C. Jones, Dvir Kafri, Kostyantyn Kechedzhi, Tanuj Khattar, Seon Kim, Alexei Kitaev, Paul V. Klimov, Andrey Klots, Alexander N. Korotkov, Fedor Kostritsa, John Mark Kreikebaum, David Landhuis, Pavel Laptev, K.-M. Lau, J. Lee, Lily Laws, W. Liu, Aditya Locharla, Orion Martin, Jarrod R. McClean, Matt McEwen, B. Meurer Costa, Kevin C. Miao, Masoud Mohseni, Shirin Montazeri, Alexis Morvan, E. Mount, Wojciech Mruczkiewicz, Ofer Naaman, M. Neeley, C. Neill, Michael Newman, Thomas E. O’Brien, Alex Opremcak, A. Petukhov, R. Potter, Chris Quintana, Nicholas C. Rubin, Negar Saei, D. Sank, Kannan Sankaragomathi, Kevin J. Satzinger
Abstract
Inherent symmetry of a quantum system may protect its otherwise fragile states. Leveraging such protection requires testing its robustness against uncontrolled environmental interactions. Using 47 superconducting qubits, we implement the one-dimensional kicked Ising model, which exhibits nonlocal Majorana edge modes (MEMs) with [Formula: see text] parity symmetry. We find that any multiqubit Pauli operator overlapping with the MEMs exhibits a uniform late-time decay rate comparable to single-qubit relaxation rates, irrespective of its size or composition. This characteristic allows us to accurately reconstruct the exponentially localized spatial profiles of the MEMs. Furthermore, the MEMs are found to be resilient against certain symmetry-breaking noise owing to a prethermalization mechanism. Our work elucidates the complex interplay between noise and symmetry-protected edge modes in a solid-state environment.