title: Scalable architecture for coherence-preserving qubits.
abstract: We propose scalable architectures for the coherence-preserving qubits introduced by Bacon, Brown, and Whaley [Phys. Rev. Lett. 87, 247902 (2001)]. These architectures employ extra qubits providing additional degrees of freedom to the system. These extra degrees of freedom can be used to counter coupling strength errors within the coherence-preserving qubit and combat interactions with environmental qubits. Importantly, these architectures provide flexibility in qubit arrangement, allowing all physical qubits to be arranged in two spatial dimensions.
authors.affiliation: Quantum Information Science Group, The Mitre Corporation, Eatontown, New Jersey 07724, USA. weinstein@mitre.org
authors.forename: Yaakov S
authors.initials: YS
authors.lastname: Weinstein
authors.forename: C Stephen
authors.initials: CS
authors.lastname: Hellberg