Scalable quantum eraser with superconducting integrated circuits

Autor(es)

Diniz, Ciro Micheletti ; Villas-Boas, Celso J. ; Santos, Alan C.

• Tipo de documento: Artigo Científico
• Fonte: QUANTUM SCIENCE AND TECHNOLOGY; v. 10, n. 2, p. 12-pg., 2025-04-01.

Resumo

A fast and scalable scheme for multi-qubit resetting in superconducting quantum processors is proposed by exploiting the feasibility of frequency-tunable transmon qubits and transmon-like couplers to engineer a full programmable superconducting erasing head. We demonstrate the emergence of collective effects that lead to a decoherence-free subspace during the erasing process. The presence of such a subspace negatively impacts the device's performance and has been overlooked in other multi-qubit chips. To circumvent this issue and pave the way to the device's scalability, we employ tunable frequency couplers to identify a specific set of parameters that enables us to erase even those states within this subspace, ensuring the simultaneous multi-qubit resetting, verified here for the two-qubit case. In contrast, we show that collectivity effects can also emerge as an ingredient to speed up the erasing process. To end, we offer a proposal to build up integrated superconducting processors that can be efficiently connected to erasure heads in a scalable way. (AU)

• Processo FAPESP: 22/10218-2 - Apagamento de Informação em Computadores Quânticos Baseados em Qubits Supercondutores
• Beneficiário: Ciro Micheletti Diniz
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 22/00209-6 - Tecnologias quânticas de segunda geração
• Beneficiário: Celso Jorge Villas-Bôas
• Modalidade de apoio: Auxílio à Pesquisa - Temático