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001     1034214
005     20250401104336.0
024 7 _ |a 10.1103/PhysRevApplied.22.064030
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100 1 _ |a Xu, Xuexin
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245 _ _ |a Lattice Hamiltonians and stray interactions within quantum processors
260 _ _ |a College Park, Md. [u.a.]
|c 2024
|b American Physical Society
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520 _ _ |a Developing Hamiltonian models for quantum processors with many qubits on the same chip is crucial for advancing quantum computing technologies. Stray couplings between qubits lead to errors in gate operations. This study underscores the importance of incorporating lattice Hamiltonians into quantum circuit design. By comparing many-body effects with two-body stray couplings, we show how adjusting circuit parameters can increase two-qubit-gate fidelity. We find that loosely decoupled qubits result in weaker stray interactions and higher gate fidelity, challenging conventional assumptions. We investigate the scenario where three-body 𝑍⁢𝑍⁢𝑍 interaction surpasses two-body 𝑍⁢𝑍 interactions, highlighting the transformative potential of lattice Hamiltonians for novel multiqubit gates. Moreover, we investigate the cross-resonance gate within the lattice-Hamiltonian framework and examine the impact of microwave pulses on stray coupling. This emphasizes the necessity of developing a comprehensive theoretical framework that includes lattice interactions, which are now critical given the sophistication of contemporary quantum hardware. These insights are vital for developing fault-tolerant quantum computing and next-generation quantum processors.
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536 _ _ |a 5221 - Advanced Solid-State Qubits and Qubit Systems (POF4-522)
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536 _ _ |a Verbundprojekt: German Quantum Computer based on Superconducting Qubits (GEQCOS) - Teilvorhaben: Charakterisierung, Kontrolle und Auslese (13N15685)
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536 _ _ |a OpenSuperQPlus - Open Superconducting Quantum Computers (101113946)
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700 1 _ |a Manabputra
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700 1 _ |a Vignes, Chloé
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700 1 _ |a Ansari, Mohammad H.
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700 1 _ |a Martinis, John M.
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773 _ _ |a 10.1103/PhysRevApplied.22.064030
|g Vol. 22, no. 6, p. 064030
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|y 2024
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856 4 _ |u https://juser.fz-juelich.de/record/1034214/files/PhysRevApplied.22.064030.pdf
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