Universal Quantum Circuits

Abstract. We define and construct efficient depth-universal and almostsize-universal quantum circuits. Such circuits can be viewed as generalpurpose simulators for central classes of quantum circuits and can be used to capture the computational power of the circuit class being simulated. For depth we construct universal circuits whose depth is the same order as the circuits being simulated. For size, there is a log factor blow-up in the universal circuits constructed here. We prove that this construction is nearly optimal.

• Type: Journal
• Year: 2008
• Where: CORR
• Authors: Debajyoti Bera, Stephen A. Fenner, Frederic Green, Steven Homer
• Keywords: Almostsize-universal Quantum Circuits, CORR 2008, Education, Quantum Circuits, Universal Circuits