Default.qubit question


Is default.qubit based off any certain quantum computer?

What are the main differences between a 5 qubit simulator (default.qubit) and say a 5 qubit IBM quantum computer in terms of the results they produce?

Thanks for your help :smiley:

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Hi @James_Ellis,

default.qubit is a general simulator, not based on any particular physical device (more specifically, it is a pure-state qubit-model simulator). It simulates what a perfect, noise-free quantum computer would do.

The main difference with, say, an IBM machine is that the IBM machine will have some noise/imperfections which deviate from the theoretical ideal. As time goes by, and physical quantum computers improve, you can expect the real-world devices to track closer and closer to what the ideal simulators produce.