4 ms·

> You aren't allowed to do any measurements half way or you will destroy your superposition. This is true of all quantum computations. It doesn't matter what t

• de_watcher 8y ago
  > This is true of all quantum computations. And also for half of my non-quantum debugging...
• foxes 8y ago
  Yes you are right, I wasnt clear, just that it seems nicer to visualise as a physical thing in an optical circuit. Also remember that you have to perform measurement multiple times. It produces a probability distribution, so you need to be confident you have the right answer.
• Strilanc 8y ago
  It's actually extremely common for quantum algorithms to have measurement operations halfway through. But they apply to individual qubits, not the whole system. For example, error corrected quantum computation involves continuously measuring particular stabilizers in order to catch when they flip. Another example: measurement can reduce the cost of uncomputation (e.g. [1]). [1]: https://quantum-journal.org/papers/q-2018-06-18-74/ https://quantum-journal.org/papers/q-2018-06-18-74/
  • deleted 8y ago
    [deleted]