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PROTECTED COMPUTATIONAL SUBSPACES OF COUPLED SUPERCONDUCTING QUBITS

MATIS CNR-INFM, Catania, Italy

Dipartimento di Metodologie Fisiche e Chimiche per l'Ingegneria (DMFCI), Università di Catania, Viale Andrea Doria 6, I-95125 Catania, Italy

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A. D'ARRIGO

MATIS CNR-INFM, Catania, Italy

Dipartimento di Metodologie Fisiche e Chimiche per l'Ingegneria (DMFCI), Università di Catania, Viale Andrea Doria 6, I-95125 Catania, Italy

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E. PALADINO

MATIS CNR-INFM, Catania, Italy

Dipartimento di Metodologie Fisiche e Chimiche per l'Ingegneria (DMFCI), Università di Catania, Viale Andrea Doria 6, I-95125 Catania, Italy

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G. FALCI

MATIS CNR-INFM, Catania, Italy

Dipartimento di Metodologie Fisiche e Chimiche per l'Ingegneria (DMFCI), Università di Catania, Viale Andrea Doria 6, I-95125 Catania, Italy

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https://doi.org/10.1142/S0219749908003906Cited by:2 (Source: Crossref)

Abstract

We discuss the effect of low-frequency noise on interacting superconducting qubits in a fixed coupling scheme. By properly choosing operating conditions, within the adiabatic framework the systems develops two decoupled subspaces. The subspace where a SWAP operation takes place turns out to be resilient to low frequency fluctuations. The possibility to encode a single qubit in a protected two-physical-qubit system subspace is briefly discussed.

Keywords:

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