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Quasiparticles in quantum spin chains with long-range interactions

Author
Organization
Project
QUTE (Quantum Tensor Networks and Entanglement)
Project
ERQUAF (Entanglement and Renormalisation for Quantum Fields)
Abstract
We study quasiparticle excitations for quantum spin chains with long-range interactions using variational matrix product state techniques. It is confirmed that the local quasiparticle ansatz is able to capture those excitations very accurately, even when the correlation length becomes very large and in the case of topological nontrivial excitation such as spinons. It is demonstrated that the breaking of the Lieb-Robinson bound follows from the appearance of cusps in the dispersion relation, and evidence is given for a crossover between different quasiparticles as the long-range interactions are tuned.
Keywords
MATRIX PRODUCT STATES, ENTANGLED PAIR STATES, RENORMALIZATION-GROUP, SYSTEMS, PROPAGATION, WAVE

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Citation

Please use this url to cite or link to this publication:

Chicago
Vanderstraeten, Laurens, Maarten Van Damme, Hans Peter Buechler, and Frank Verstraete. 2018. “Quasiparticles in Quantum Spin Chains with Long-range Interactions.” Physical Review Letters 121 (9).
APA
Vanderstraeten, Laurens, Van Damme, M., Buechler, H. P., & Verstraete, F. (2018). Quasiparticles in quantum spin chains with long-range interactions. PHYSICAL REVIEW LETTERS, 121(9).
Vancouver
1.
Vanderstraeten L, Van Damme M, Buechler HP, Verstraete F. Quasiparticles in quantum spin chains with long-range interactions. PHYSICAL REVIEW LETTERS. 2018;121(9).
MLA
Vanderstraeten, Laurens, Maarten Van Damme, Hans Peter Buechler, et al. “Quasiparticles in Quantum Spin Chains with Long-range Interactions.” PHYSICAL REVIEW LETTERS 121.9 (2018): n. pag. Print.
@article{8575091,
  abstract     = {We study quasiparticle excitations for quantum spin chains with long-range interactions using variational matrix product state techniques. It is confirmed that the local quasiparticle ansatz is able to capture those excitations very accurately, even when the correlation length becomes very large and in the case of topological nontrivial excitation such as spinons. It is demonstrated that the breaking of the Lieb-Robinson bound follows from the appearance of cusps in the dispersion relation, and evidence is given for a crossover between different quasiparticles as the long-range interactions are tuned.},
  articleno    = {090603},
  author       = {Vanderstraeten, Laurens and Van Damme, Maarten and Buechler, Hans Peter and Verstraete, Frank},
  issn         = {0031-9007},
  journal      = {PHYSICAL REVIEW LETTERS},
  keywords     = {MATRIX PRODUCT STATES,ENTANGLED PAIR STATES,RENORMALIZATION-GROUP,SYSTEMS,PROPAGATION,WAVE},
  language     = {eng},
  number       = {9},
  pages        = {6},
  title        = {Quasiparticles in quantum spin chains with long-range interactions},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.121.090603},
  volume       = {121},
  year         = {2018},
}

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