Towards experimental tests and applications of Lieb-Robinson bounds
arXiv:1308.2882 · doi:10.1103/PhysRevA.89.022126
Abstract
Spin-polarized scanning tunneling microscopy is identified as a suitable experimental technique to investigate the quantitative quality of Lieb-Robinson bounds on the signal velocity. The latest, most general bound is simplified and it is shown that there is a discrepancy by a factor of approximately 4 between the corresponding limit speed and some estimated exact velocities in atomic spin chains. The observed discrepancy facilitates conclusions for a further mathematical improvement of Lieb-Robinson bounds. The real signal propagation can be modified with several experimental parameters from which the bounds are independent. This enables the application of Lieb-Robinson bounds as upper limits on the enhancement of the real signal speed for information transport in spintronic devices.
References in corpus (4)
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Cited by in corpus (5)
- Many-body localisation implies that eigenvectors are matrix-product states
- Experimental tests of Lieb-Robinson bounds
- A Lieb-Robinson bound for quantum spin chains with strong on-site impurities
- Time-Polynomial Lieb-Robinson bounds for finite-range spin-network models
- Lieb-Robinson correlation function for the quantum transverse field Ising model