Probing topological spin liquids on a programmable quantum simulator
By G. Semeghini, H. Levine, A. Keesling, S. Ebadi, T. T. Wang, D. Bluvstein, R. Verresen, Hannes Pichler, M. Kalinowski, R. Samajdar and 6 more. Science, 2021
805 citations recorded by the source corpus.
Description Synthesizing topological order Topologically ordered matter exhibits long-range quantum entanglement. However, measuring this entanglement in real materials is extremely tricky. Now, two groups take a different approach and turn to synthetic systems to engineer the topological order of the so-called toric code type (see the Perspective by Bartlett). Satzinger et al. used a quantum processor to study the ground state and excitations of the toric code. Semeghini et al. detected signatures of a toric code–type quantum spin liquid in a two-dimensional array of Rydberg atoms held in optical tweezers. —JS Topological order of the toric code type is realized in two synthetic quantum systems. Quantum spin liquids, exotic phases of matter with topological order, have been a major focus in physics for the past several decades. Such phases feature long-range quantum entanglement that can potentially be exploited to realize robust quantum computation. We used a 219-atom programmable quantum simulator to probe quantum spin liquid states. In our approach, arrays of atoms were placed on the links of a kagome lattice, and evolution under Rydberg blockade created frustrated quantum states with no local order. The onset of a quantum spin liquid phase of the paradigmatic toric code type was detected by using topological string operators that provide direct signatures of topological order and quantum correlations. Our observations enable the controlled experimental exploration of topological matter and protected quantum information processing.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/1b9bdd45ebe27ef55762950de70d593fcf6e5cef
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In Atomic and Molecular Physics, and Optics
- Antoine Browaeys
- Thierry Lahaye
- Andrew J. Daley
- Peter Zoller
- D. Barredo
- I. Bloch
- Matthias Troyer
- C. Kokail
In Condensed Matter Physics
Citations in the corpus
- Practical quantum advantage in quantum simulation (2022, background): “…the exploration of out-of-equilibrium dynamics of the Hubbard model 30,31 , disordered, interacting many-particle systems 82 , topological phases of matter 32,33,83 , robust features of out of equilibrium dynamics such as quantum many-body scars 34,84 , and Boson sampling as noted earlier 10 .”
- Microwave-engineering of programmable XXZ Hamiltonians in arrays of Rydberg atoms (2021, methodology): “Using this fact, arrays containing up to hundreds of atoms have been used to prepare antiferromagnetic order in 2D [27–29] or 3D [30], study exotic phases and quantum phase transitions [31, 32], and observe the first evidence of a spin liquid [33].”