From 5b92eaead43bfeeee70f165b15c67bc702e1575e Mon Sep 17 00:00:00 2001 From: Kris Date: Thu, 5 Feb 2026 21:28:53 +0000 Subject: [PATCH] Document NumPy 1 interaction with max simulation size --- docs/choose_hw.md | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/docs/choose_hw.md b/docs/choose_hw.md index 19094b042..2441dfb16 100644 --- a/docs/choose_hw.md +++ b/docs/choose_hw.md @@ -311,6 +311,13 @@ depth beyond 20 qubits. * The total small circuits runtime overhead for an N qubit circuit depends on the circuit depth and on N. The overhead can be large enough to conceal the $2^N$ growth in runtime. +* NumPy version matters for large simulations: + * Some users have reported being unable to simulate circuits with more than + ~32 qubits when using NumPy 1.26. + * Updating NumPy to version 2.x resolved the issue in these cases. + * If you encounter unexpected failures, memory errors, or hard limits on + the number of qubits, ensure you are running a recent NumPy version + before further debugging. ## Sample benchmarks