Quantum Chaos is Quantum

Quantum 5, 453 (2021).


It is well known that a quantum circuit on $N$ qubits composed of Clifford gates with the addition of $k$ non Clifford gates can be simulated on a classical computer by an algorithm scaling as $text{poly}(N)exp(k)$[1]. We show that, for a quantum circuit to simulate quantum chaotic behavior, it is both necessary and sufficient that $k=Theta(N)$. This result implies the impossibility of simulating quantum chaos on a classical computer.

Source Quantum | The open journal for quantum science Quantum Chaos is Quantum

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