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Spectroscopic signatures of localization with interacting photons in superconducting qubits

Roushan, Pedram, 1977-, Neill, Charles, Tangpanitanon, Jirawat, Bastidas, Victor Manuel, Megrant, Anthony E, Barends, R., Chen, Y., Chen, Zijun, Chiaro, B., Dunsworth, A., Fowler, Austin G., Foxen, B., Giustina Manica, 1979-, Jeffrey, Evan R., Kelly, Julian M., Lucero, Erik A., Mutus, Josh Y., Neeley, Matthew, Quintana, Chris M., Sank, Daniel, Vainsencher, Amit S, Wenner, James, White, T. C., Neven, Hartmut, Aggelakis Dimitrios, Martinis, John M.

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URI: http://purl.tuc.gr/dl/dias/B5913D72-263D-4DE4-96A4-EA5EA00F96A4
Year 2017
Type of Item Peer-Reviewed Journal Publication
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Summary

Quantized eigenenergies and their associated wave functions provide extensive information for predicting the physics of quantum many-body systems. Using a chain of nine superconducting qubits, we implement a technique for resolving the energy levels of interacting photons. We benchmark this method by capturing the main features of the intricate energy spectrum predicted for two-dimensional electrons in a magnetic field—the Hofstadter butterfly. We introduce disorder to study the statistics of the energy levels of the system as it undergoes the transition from a thermalized to a localized phase. Our work introduces a many-body spectroscopy technique to study quantum phases of matter. © 2017, American Association for the Advancement of Science.

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