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Peer-reviewedCC BY-NC-NDNature communications

Dynamical signatures of conventional and asymptotic quantum many-body scars on a trapped ion simulator.

  • Leonard Logarić1,2,3
  • John Goold4,5,6,7
  • Shane Dooley8,9
9 affiliations
  1. 1School of Physics, Trinity College Dublin, Dublin 2, Ireland. [email protected].
  2. 2Trinity Quantum Alliance, Unit 16, Trinity Technology and Enterprise Centre, Dublin 2, Ireland. [email protected].
  3. 3International Center for Elementary Particle Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. [email protected].
  4. 4School of Physics, Trinity College Dublin, Dublin 2, Ireland.
  5. 5Trinity Quantum Alliance, Unit 16, Trinity Technology and Enterprise Centre, Dublin 2, Ireland.
  6. 6Algorithmiq S.r.l., Via della Chiusa 15, Milan, 20123, Italy.
  7. 7Rinn Quantum, School of Physics, Trinity College Dublin, Dublin 2, Ireland.
  8. 8Trinity Quantum Alliance, Unit 16, Trinity Technology and Enterprise Centre, Dublin 2, Ireland. [email protected].
  9. 9Dublin Institute for Advanced Studies, School of Theoretical Physics, Dublin, Ireland. [email protected].
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Abstract

One of the promising applications of digital quantum processors is the simulation of many-body quantum systems. They have been already used to investigate several ergodicity violating mechanisms, such as many-body localisation, Hilbert space fragmentation and quantum many-body scars (QMBS). In addition to conventional QMBS, a recently discovered mechanism for ergodicity violation are the so-called asymptotic quantum many-body scars (AQMBS). These become more stable as system size is increased, leading to progressively longer thermalisation timescales. In this work, we show a connection between gapless excitations of certain "reference" Hamiltonians and AQMBS in a related set of Hamiltonian and circuit models. We use this connection to construct a 2-local model hosting both conventional and asymptotic scars. By exploiting the structure of the AQMBS states and the all-to-all connectivity of the Quantinuum H1-1 quantum processor, we prepare these states in logarithmic circuit depth, and probe their thermalisation under Floquet circuit dynamics. Performing simulations with up to 418 entangling ZZ gates, we find slower thermalisation times as the system size is increased, providing experimental signatures of AQMBS.

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Cite

BibTeXRIS
BibTeX
@article{logaric2026dynamical,
  title = {{Dynamical signatures of conventional and asymptotic quantum many-body scars on a trapped ion simulator.}},
  author = {Leonard Logarić and John Goold and Shane Dooley},
  journal = {Nature communications},
  year = {2026},
  month = sep,
  doi = {10.1038/s41467-026-77411-5},
  url = {https://europepmc.org/article/MED/42894016},
  note = {CC BY-NC-ND},
}
RIS
TY  - JOUR
TI  - Dynamical signatures of conventional and asymptotic quantum many-body scars on a trapped ion simulator.
AU  - Leonard Logarić
AU  - John Goold
AU  - Shane Dooley
PY  - 2026
DA  - 2026/09/16
JO  - Nature communications
DO  - 10.1038/s41467-026-77411-5
UR  - https://europepmc.org/article/MED/42894016
AB  - One of the promising applications of digital quantum processors is the simulation of many-body quantum systems. They have been already used to investigate several ergodicity violating mechanisms, such as many-body localisation, Hilbert space fragmentation and quantum many-body scars (QMBS). In addition to conventional QMBS, a recently discovered mechanism for ergodicity violation are the so-called asymptotic quantum many-body scars (AQMBS). These become more stable as system size is increased, leading to progressively longer thermalisation timescales. In this work, we show a connection between gapless excitations of certain "reference" Hamiltonians and AQMBS in a related set of Hamiltonian and circuit models. We use this connection to construct a 2-local model hosting both conventional and asymptotic scars. By exploiting the structure of the AQMBS states and the all-to-all connectivity of the Quantinuum H1-1 quantum processor, we prepare these states in logarithmic circuit depth, and probe their thermalisation under Floquet circuit dynamics. Performing simulations with up to 418 entangling ZZ gates, we find slower thermalisation times as the system size is increased, providing experimental signatures of AQMBS.
SN  - 2041-1723
ER  -