Abstract: In a general aspect, a surface code syndrome measurement is performed on a superconducting quantum processing unit. In some implementations, the superconducting quantum processing unit is caused to apply a quantum error correction code including X-type and Z-type stabilizer check patches. Each of the X-type and Z-type stabilizer check patches includes a stabilizer check qubit device and data qubit devices of the superconducting quantum processing unit. Applying the quantum error correction code includes iteratively twirling the data qubit devices in a stabilizer check patch; and evolving the stabilizer check qubit device in the stabilizer check patch and the data qubit devices in the stabilizer check patch under an interaction Hamiltonian. The interaction Hamiltonian includes a plurality of terms interactions between the stabilizer check qubit device in the stabilizer check patch and a respective one of the data qubit devices in the stabilizer check patch.

Abstract: The invention is directed to routing data packets in networks having routers configured as a virtual router using virtual router redundancy protocol (VRRP). Embodiments of the invention adjust route metrics to aid in providing predictable selection of routes into VRRP subnets. Advantageously, providing predictable selection of routes into VRRP subnets enhances a network operator's ability to meet service level agreements for critical or delay sensitive applications.

Abstract: The invention is directed to routing data packets in networks having routers configured as a virtual router using virtual router redundancy protocol (VRRP). Embodiments of the invention adjust route metrics to aid in providing predictable selection of routes into VRRP subnets. Advantageously, providing predictable selection of routes into VRRP subnets enhances a network operator's ability to meet service level agreements for critical or delay sensitive applications.