Correlated noise enhancement of coherence and fidelity in coupled qubits

Bittner, Eric R.; Li, Hao; Shah, S. A.; Silva-Acuña, Carlos; Piryatinski, Andrei

doi:10.1080/14786435.2024.2341011

Philosophical Magazine

2024

DOI: 10.1080/14786435.2024.2341011

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Correlated noise enhancement of coherence and fidelity in coupled qubits

Eric R. Bittner,

Hao Li,

S. A. Shah

et al.

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2024

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Noise-Induced Quantum Synchronization and Entanglement in a Quantum Analogue of Huygens’ Clock

Tyagi,

Li,

Bittner

et al. 2024

J. Phys. Chem. Lett.

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We propose a quantum analogue of the Huygens clock, where the phases of two spins synchronize through their interaction with a shared environment. This environment acts like the escapement mechanism in a mechanical clock, regulating the gear train and allowing discrete timing advances. In our model, the relative phases of the two spins synchronize via a mutually correlated environment. We demonstrate that several arguments can significantly reduce the cardinality of the allowed measurements for a system of qubits, thus simplifying the problem. We present a numerically efficient method to calculate the degree of quantumness in the correlations of the final density matrix, providing a tight upper bound for rank 3 and rank 4 density matrices. We suggest a potential realization of noise-induced synchronization between two nuclear spins coupled to a common ancilla undergoing dynamical decoupling.

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Noise-Induced Quantum Synchronization and Entanglement in a Quantum Analogue of Huygens’ Clock

Tyagi,

Li,

Bittner

et al. 2024

J. Phys. Chem. Lett.

View full text Add to dashboard Cite

show abstract

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Correlated noise enhancement of coherence and fidelity in coupled qubits

Cited by 1 publication

References 22 publications

Noise-Induced Quantum Synchronization and Entanglement in a Quantum Analogue of Huygens’ Clock

Noise-Induced Quantum Synchronization and Entanglement in a Quantum Analogue of Huygens’ Clock

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