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Title · changed: Revision 1: Do quantum fluctuations change nonthermal fixed-point exponents; Revision 2: Do quantum fluctuations change nonthermal fixed-point exponents?
Plain: Most theory of these scaling stages treats the atoms' matter wave as a classical field with random noise, which works when many atoms share each state. Whether genuinely quantum effects change the universal behaviour, for example at strong interactions, is untested.
Precise: Classical-statistical (truncated Wigner) simulations reproduce nonthermal fixed points when occupations $f(k) >> 1$ in the scaling window. In strongly interacting or low-occupation regimes (e.g. the 1D Lieb-Liniger gas with dimensionless coupling $\gamma >\sim 1$, or the Bose-Hubbard model at $U/J >\sim 10$), determine whether $\alpha$ and $\beta$ differ from the classical-field values for the same initial conditions. Answer yes or no, with the exponents.
Settled by: Fully quantum simulation (tensor networks in 1D, or quantum-simulator data) of the scaling window compared with truncated-Wigner exponents at identical parameters.
Kind: well-posed
Answer type: yes-no
References: (empty)
Literature status: open
Status note: (empty)
Posed since: (empty)

Decisions