• Question: is it possible to have more than 4 states in a quantum computer?

    Asked by Jahred Juele to Hugh on 15 Nov 2018.
    • Photo: Hugh Manning

      Hugh Manning answered on 15 Nov 2018: last edited 15 Nov 2018 10:59 pm

      Hi there! Thanks for posting your question here.

      Yes! The amount of states depends on the amount of qubits in the quantum computer.
      2 quibits have 4 states, 3 quibits have 8 states, this scales like 2^n states, where n is the number of qubits! (2^2=4, 2^3=8)

      Google announced earlier in the year, the most amount of qubits in a 72-qubit universal quantum computer!
      https://ai.googleblog.com/2018/03/a-preview-of-bristlecone-googles-new.html

      This means that the supercomputer could be in 2^72 states! or the same as 4.7223665E+21classical bits!

      You might have seen this video before! But if anyone is reading this question and wants to find out more about quantum computers this is a great start!

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