OpenAI reports a nearly quartic quantum query separation

There are total Boolean functions whose bounded-error randomized query complexity cannot obey any universal bound of the form O((1+Q(f))^α) with α<4, where Q is bounded-error quantum query complexity.

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Understanding the problem

Read the background

There are total Boolean functions whose bounded-error randomized query complexity cannot obey any universal bound of the form O((1+Q(f))^α) with α<4, where Q is bounded-error quantum query complexity.

Why it matters

If correct, makes the quartic exponent of the general randomized-versus-quantum query upper bound optimal.

What counts as progress

Is the quartic randomized-versus-quantum query bound optimal for total functions?

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