Title
Quantum Proofs Can Be Verified Using Only Single-Qubit Measurements
Abstract
Quantum Merlin Arthur (QMA) is the class of problems which, though potentially hard to solve, have a quantum solution that can be verified efficiently using a quantum computer. It thus forms a natural quantum version of the classical complexity class NP (and its probabilistic variant MA, Merlin-Arthur games), where the verifier has only classical computational resources. In this paper, we study what happens when we restrict the quantum resources of the verifier to the bare minimum: individual measurements on single qubits received as they come, one by one. We find that despite this grave restriction, it is still possible to soundly verify any problem in QMA for the verifier with the minimum quantum resources possible, without using any quantum memory or multiqubit operations. We provide two independent proofs of this fact, based on measurement-based quantum computation and the local Hamiltonian problem. The former construction also applies to QMA(1), i.e., QMA with one-sided error.
Year
DOI
Venue
2015
10.1103/PhysRevA.93.022326
PHYSICAL REVIEW A
Field
DocType
Volume
Quantum complexity theory,Quantum mechanics,Quantum computer,Quantum algorithm,Quantum information,Quantum operation,Quantum error correction,Quantum capacity,Physics,Quantum network
Journal
93
Issue
ISSN
Citations 
2
2469-9926
6
PageRank 
References 
Authors
0.60
0
3
Name
Order
Citations
PageRank
Tomoyuki Morimae14114.18
Daniel Nagaj2575.84
Norbert Schuch3212.35