| Autor: |
Roberto Collins, Trevor McCourt, Sabrina Hong, Brooks Foxen, Michael Broughton, Daniel Eppens, Alan Ho, Kevin J. Satzinger, Cody Jones, Edward Farhi, Lev Ioffe, William J. Huggins, Joao Marcos Vensi Basso, Doug Strain, Z. Jamie Yao, Alexandre Bourassa, Xiao Mi, Andrew Dunsworth, Bob B. Buckley, Marissa Giustina, David Landhuis, Vadim Smelyanskiy, Josh Mutus, Sean Demura, Daniel Sank, Craig Gidney, Kostyantyn Kechedzhi, Kunal Arya, Andre Petukhov, Juan Atalaya, Alan R. Derk, Pavel Laptev, Igor L. Aleiner, Alexei Kitaev, David A. Buell, A. Opremcak, Joseph C. Bardin, Murphy Yuezhen Niu, B. Burkett, Julian Kelly, Masoud Mohseni, Michael Newman, Sergei V. Isakov, Ryan Babbush, Eric Ostby, Nicholas C. Rubin, Rami Barends, Sean D. Harrington, Pedram Roushan, Frank Arute, Paul V. Klimov, Fedor Kostritsa, Hartmut Neven, Alexander N. Korotkov, Salvatore Mandrà, Sergio Boixo, Austin G. Fowler, Jeffrey S. Marshall, Zhang Jiang, Chris Quintana, Zijun Chen, Matthew Neeley, Benjamin Chiaro, Seon Kim, Dvir Kafri, Matthew P. Harrigan, Kevin C. Miao, Bálint Pató, J. Hilton, Orion Martin, Charles Neill, Yu Chen, Andreas Bengtsson, Thomas E. O'Brien, Jarrod R. McClean, Ofer Naaman, Ping Yeh, Nicholas Redd, Matt McEwen, Evan Jeffrey, Trent Huang, Shirin Montazeri, Anthony Megrant, Marco Szalay, William Courtney, Wojciech Mruczkiewicz, Nicholas Bushnell, Theodore White, Jonathan A. Gross, Benjamin Villalonga, E. Lucero, Vladimir Shvarts, Catherine Erickson, Adam Zalcman, Matthew D. Trevithick |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Popis: |
Interactions in quantum systems can spread initially localized quantum information into the exponentially many degrees of freedom of the entire system. Understanding this process, known as quantum scrambling, is key to resolving several open questions in physics. Here, by measuring the time-dependent evolution and fluctuation of out-of-time-order correlators, we experimentally investigate the dynamics of quantum scrambling on a 53-qubit quantum processor. We engineer quantum circuits that distinguish operator spreading and operator entanglement and experimentally observe their respective signatures. We show that whereas operator spreading is captured by an efficient classical model, operator entanglement in idealized circuits requires exponentially scaled computational resources to simulate. These results open the path to studying complex and practically relevant physical observables with near-term quantum processors. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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