Indefinite causal order (indefinite causal structure) is already demonstrated at the quantum level at least. Do time crystals demonstrate macrostate retrocausa

Indefinite causal order (indefinite causal structure) is already demonstrated at the quantum level at least. Do time crystals demonstrate macrostate retrocausality? There are time crystal in childrens' chemistry sets and they've been there for years. In this video [1], Physics Girl creates two vortices in a pool with plates and dyes the fluid flow between them with food coloring. How is this matter information flow between low pressure centers of local fluid vortices different from wormholes and ER=EPR particle state linkage? Is this effect of linkage between vortices the same thing as ER=EPR wormholes? Similarities: Low pressure in the center of a vortex; fluid vortical dynamics, State linkage across spacetime, Refractory occlusion, Glowing edge at the boundary of the system FWIU, there are various types of quantum entropy; entanglement and non-entanglement entropy. Quantum discord [2]: > In quantum information theory, quantum discord is a measure of nonclassical correlations between two subsystems of a quantum system. It includes correlations that are due to quantum physical effects but do not necessarily involve quantum entanglement. With wormholes, doesn't the degree of complexity of the universe increase significantly; when any particle state in a system with fluidic dynamics can be linked to any other particle state in spacetime, what is the degree of the Hilbert space? Can there be ER=EPR wormholes between here and the other side of the apparently expanding universe, and is c the speed of light the limit? Is the universe expanding faster than c; is |v1|+|v2| > c anywhere? From https://news.ycombinator.com/item?id=39718864 https://news.ycombinator.com/item?id=39718864 regarding Hubble's expansion constant and `(v_other_direction + c) > c` : > If virtual particle states are entangled with particle states in black holes or through ER=EPR bridges, is there effectively FTL? > There is FTL within dielectric antennae. Are there paths between points in spacetime which are faster than the path that a photon would take given gravity and solar wind? From "Light and gravitational waves don't arrive simultaneously" (2023; GW170817) https://news.ycombinator.com/item?id=38056295 https://news.ycombinator.com/item?id=38056295 : >> "Gravity as a fluid dynamic phenomenon in a superfluid quantum space. Fluid quantum gravity and relativity." (2015) https://hal.science/hal-01248015/ https://hal.science/hal-01248015/ >> In SQS (Superfluid Quantum Space), Quantum gravity has fluid vortices with Gross-Pitaevskii, Bernoulli's, and IIUC so also Navier-Stokes; so Quantum CFD (Computational Fluid Dynamics) [1] https://www.youtube.com/watch?v=pnbJEg9r1o8 https://www.youtube.com/watch?v=pnbJEg9r1o8 [2] https://en.wikipedia.org/wiki/Quantum_discord https://en.wikipedia.org/wiki/Quantum_discord Also, this video depicts how much dye exchanges through the "sidewall" of a fluid vortex. Is the dye that exchanges with the system outside the vortex similar to Hawking Entropy that escapes a gravitational fluid phenomena like a black hole, or a different phenomena? [3] "Filming Inside a Slow Motion Vortex - The Slow Mo Guys" https://www.youtube.com/watch?v=0_avPbgxw28 https://www.youtube.com/watch?v=0_avPbgxw28 And so, time travel and ER=EPR: https://en.wikipedia.org/wiki/ER_%3D_EPR https://en.wikipedia.org/wiki/ER_%3D_EPR