Lyapunov vectors and excited energy states of the directed polymer in random media
Physical Review E, ISSN: 2470-0053, Vol: 109, Issue: 1, Page: L012102
2024
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Article Description
The scaling behavior of the excited energy states of the directed polymer in random media is analyzed numerically. We find that the spatial correlations of polymer energies scale as ∼k-δ for small enough wave numbers k with a nontrivial exponent δ≈1.3. The equivalence between the stochastic-field equation that describes the partition function of the directed polymer and that governing the time evolution of infinitesimal perturbations in space-time chaos is exploited to connect this exponent δ with the spatial correlations of the Lyapunov vectors reported in the literature. The relevance of our results for other problems involving optimization in random systems is discussed.
Bibliographic Details
American Physical Society (APS)
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