A Quantum Instruction Set Implemented on a Superconducting Quantum Processor

摘要: A quantum algorithm consists of a sequence operations and measurements applied to processor. To date, the instruction set which defines this has been provided by classical computer passed via control hardware Here, we demonstrate first experimental realization set, in fixed classically-defined gates perform an operation that is fully determined only input sequence. Specifically, implement density matrix exponentiation algorithm, consumes $N$ copies state $\rho$ approximate $e^{-i \rho \theta}$ ($\theta$ arbitrary angle). Our implementation relies on 99.7% fidelity controlled-phase gate between two superconducting transmon qubits. We achieve average algorithmic $\approx 0.9$, independent setting $\rho$, circuit depth nearly 90. This new paradigm for instructions applications resource-efficient protocols validating entanglement spectra, principal component analysis large states, universal emulation.