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ALT Two Feynman diagrams are depicted. The top diagram shows two red wavy lines labeled "g\mu" entering and exiting black dots connected by a blue solid loop line labeled "\phi_{bra}". The bottom diagram has a dashed blue loop line labeled "\phi_{ket}" connecting similar features. A plus sign separates the diagrams.

ALT A table representing the classical-quantum path integral, which generalizes the Feynman-Vernon path integral of open quantum systems and the stochastic path integral of classical systems. The first column depicts the equation for the path integral, the second column contains the action equation, and the third column contains the completely positive (CP) condition equation.

ALT excerpt from Scott's blog: "So, here it is: if quantum computers start breaking cryptography a few years from now, don’t you dare come to this blog and tell me that I failed to warn you. This post is your warning. Please start switching to quantum-resistant encryption, and urge your company or organization or blockchain or standards body to do the same."

























