Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device.

ABSTRACT: Silicon nanoelectronic devices can host single-qubit quantum logic operations with fidelity better than 99.9%. For the spins of an electron bound to a single-donor atom, introduced in the silicon by ion implantation, the quantum information can be stored for nearly 1 second. However, manufacturing a scalable quantum processor with this method is considered challenging, because of the exponential sensitivity of the exchange interaction that mediates the coupling between the qubits. Here we demonstrate the conditional, coherent control of an electron spin qubit in an exchange-coupled pair of ³¹P donors implanted in silicon. The coupling strength, J = 32.06 ± 0.06 MHz, is measured spectroscopically with high precision. Since the coupling is weaker than the electron-nuclear hyperfin

SUBMITTER: Ma Dzik MT 

PROVIDER: S-EPMC7794236 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature