Lower bounds on the best separable approximation distance for non-pure spin-squeezed states are obtained from the complete set of spin-squeezing inequalities, with symmetry-exploiting optimization for upper bounds, revealing finite-temperature entanglement in ordered phases of the XXZ model.
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In 1D all-bands-flat condensates, infinitesimal interactions trigger a geometry-driven transition to a nematic manifold for θ ≥ π/8, with density-modulated states at θ=π/4 thermally selected via order-by-disorder.
Active particles destabilize passive membranes by lowering effective tension and bending rigidity through solved pressure contributions and non-local terms.
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Estimating the best separable approximation of non-pure spin-squeezed states
Lower bounds on the best separable approximation distance for non-pure spin-squeezed states are obtained from the complete set of spin-squeezing inequalities, with symmetry-exploiting optimization for upper bounds, revealing finite-temperature entanglement in ordered phases of the XXZ model.
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Nematic Phase Transitions and Density Modulations in 1D Flat Band Condensates
In 1D all-bands-flat condensates, infinitesimal interactions trigger a geometry-driven transition to a nematic manifold for θ ≥ π/8, with density-modulated states at θ=π/4 thermally selected via order-by-disorder.
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Active Particles Destabilize Passive Membranes
Active particles destabilize passive membranes by lowering effective tension and bending rigidity through solved pressure contributions and non-local terms.