23 0 v 2 7 N ov 2 00 5 QMA / qpoly ⊆ PSPACE / poly : De-Merlinizing Quantum Protocols

@inproceedings{Aaronson2006230V,
  title={23 0 v 2 7 N ov 2 00 5 QMA / qpoly ⊆ PSPACE / poly : De-Merlinizing Quantum Protocols},
  author={Scott Aaronson},
  year={2006}
}
This paper introduces a new technique for removing existential quantifiers over quantum states. Using this technique, we show that there is no way to pack an exponential number of bits into a polynomial-size quantum state, in such a way that the value of any one of those bits can later be proven with the help of a polynomial-size quantum witness. We also show that any problem in QMA with polynomial-size quantum advice, is also in PSPACE with polynomial-size classical advice. This builds on our… CONTINUE READING

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