A one-copy-undistillable NPT state in the canonical DiVincenzo family is two-copy distillable for every local dimension d>=3, disproving the conjecture that the entire one-copy-undistillable region stays undistillable.
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Two-copy distillability of one-copy-undistillable negative-partial-transpose states in every dimension
A one-copy-undistillable NPT state in the canonical DiVincenzo family is two-copy distillable for every local dimension d>=3, disproving the conjecture that the entire one-copy-undistillable region stays undistillable.