SINGLE-CYCLE OPERATIONS USING CONTROLLABLY MEDIATED EXCHANGE-TYPE INTERACTIONS BETWEEN QUBITS

摘要

A method of operating a quantum information processing apparatus is provided. This apparatus includes a structure of coupled qubits, where N≥3, wherein the structure further includes coupling elements. The coupling elements couple pairs of N qubits, wherein, at least, a portion of the qubits are connected by a respective one of the coupling elements, whereby the two qubits of each said pair are connected by a respective coupling element. A method comprises identifying a path of M qubits in the structure of coupled qubits, wherein the path extends from a first qubit to a last qubit of the N qubits. The identified path consists of M qubits and M−1 coupling elements alternating along said path, where 2M≤N. A single-cycle operation is performed, wherein all pairs of two successive qubits in the identified path are concomitantly subjected to exchange-type interactions of distinct strengths.