Probing topological spin liquids on a programmable quantum simulator

Giulia Semeghini; Harry Levine; Alexander Keesling; Sepehr Ebadi; Tout Wang; Dolev Bluvstein; Ruben Verresen; Hannes Pichler; Marcin Kalinowski; Rhine Samajdar; Ahmed Omran; Subir Sachdev; Ashvin Vishwanath; Markus Greiner; Vladan Vuletic; Mikhail Lukin

doi:10.1117/12.2615077

9 March 2022 Probing topological spin liquids on a programmable quantum simulator

Giulia Semeghini, Harry Levine, Alexander Keesling, Sepehr Ebadi, Tout Wang, Dolev Bluvstein, Ruben Verresen, Hannes Pichler, Marcin Kalinowski, Rhine Samajdar, Ahmed Omran, Subir Sachdev, Ashvin Vishwanath, Markus Greiner, Vladan Vuletic, Mikhail Lukin

Author Affiliations +

Proceedings Volume PC12015, Quantum Computing, Communication, and Simulation II; PC120150A (2022) https://doi.org/10.1117/12.2615077
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Quantum phases with topological order, such as quantum spin liquids, have been the focus of explorations for several decades. Such phases feature a number of remarkable properties including long-range quantum entanglement. Moreover, they can be potentially exploited for the realization of robust quantum computation, as exemplified by the paradigmatic toric code model. While some indications that such phases may be present in frustrated condensed matter systems have been previously reported, so far quantum spin liquids have eluded direct experimental detection. In this talk, I will show how a programmable quantum simulator based on Rydberg atom arrays can be used to realize and probe quantum spin liquid states. In our approach, atoms are placed on the links of a kagome lattice and coherent evolution under Rydberg blockade enables the transition into frustrated quantum states with no local order. We detect the onset of a quantum spin liquid phase of the toric code type by measuring topological string operators in two complementary bases. The properties of this state are further revealed using a lattice with non-trivial topology, representing a step towards the realization of a topological qubit. Our observations open the door to the controlled experimental exploration of topological quantum matter, and could enable the investigation of new methods for topologically protected quantum information processing.

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Giulia Semeghini, Harry Levine, Alexander Keesling, Sepehr Ebadi, Tout Wang, Dolev Bluvstein, Ruben Verresen, Hannes Pichler, Marcin Kalinowski, Rhine Samajdar, Ahmed Omran, Subir Sachdev, Ashvin Vishwanath, Markus Greiner, Vladan Vuletic, and Mikhail Lukin "Probing topological spin liquids on a programmable quantum simulator", Proc. SPIE PC12015, Quantum Computing, Communication, and Simulation II, PC120150A (9 March 2022); https://doi.org/10.1117/12.2615077

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KEYWORDS

Liquids

Chemical species

Condensed matter

Quantum communications

Quantum computing

Quantum information

Quantum information processing

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