Quantum turbulence, superfluidity, non-Markovian dynamics, and wave function thermalization

Abstract

While quantum turbulence has been addressed both experimentally (predominantly for superfluid ${}^4$He and ${}^3$He) and theoretically, the dynamics of various ensembles of quantized vortices was followed in time only until the vortices decay into phonons. How this ``thermalization'' is achieved is still an unaddressed and thus an unelucidated question. The Unitary Fermi Gas (UFG) is a unique quantum system, which has no classical counterpart and of relevance to neutron stars, cold atoms, condensed matter and nuclear many-body systems. The non-Markovian evolution of an isolated UFG is put in evidence and its entire non-equilibrium evolution can be studied theoretically within a unified theoretical framework. The initial lattice of quantum vortices and anti-vortices evolves through a couple of vortex tangles and excitation of Kelvin waves, where vortices cross and reconnect, until very slowly thermalization sets in.

8 pages, 6 figures, online supplemental material, published version

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Cited by in corpus (5)

• Time-Dependent Density Functional Theory Description of ${}^{238}$U(n,f), ${}^{240,242}$Pu(n,f) and ${}^{237}$Np(n,f) Reactions
• Light Propagation through Space-Time Non-Markovian Random Media
• Local Quantum Cooling for Large Fermi Systems with Pairing
• Generation of wave turbulence in dipolar gases driven across their phase transitions
• A critical assessment of the current implementations of the Generator Coordinate Method