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Reducing qubit frequency collisions through lattice design

專利號
US12137619B2
公開日期
2024-11-05
申請人
International Business Machines Corporation(US NY Armonk)
發(fā)明人
Jerry M. Chow; Easwar Magesan; Matthias Steffen; Jay M. Gambetta; Maika Takita
IPC分類
H10N60/80; G06N10/00; H10N60/12
技術(shù)領(lǐng)域
qubits,qubit,vertices,lattice,dodecagons,octagons,structures,edges,hexagons,target
地域: NY NY Armonk

摘要

Lattice arrangements for quantum qubits are described. A lattice arrangement can comprise adjacent structures having vertices connected by edges. The qubits can be positioned on the vertices. A qubit in the lattice arrangement directly connects to not more than three other qubits, or connects to another qubit via a coupling qubit on an edge between two qubits on a vertex. The adjacent structures can comprise hexagons, dodecagons or octagons. A superconducting qubit lattice can comprise superconducting target qubits and superconducting control qubits. The superconducting qubit lattice can comprise adjacent structures having vertices connected by edges, with target qubits positioned on the vertices and control qubits positioned on the edges. Logic operations between adjacent superconducting target and control qubits can be implemented by driving the superconducting control qubit at or near the frequency of the superconducting target qubit.

說明書

FIG. 7 shows another lattice arrangement 710 with two-dimensional structures comprising dodecagons; one such structure is represented in the dashed box 772. As can be seen from FIG. 7, including by the qubit 774 (represented by a black circle) and its neighboring qubits 776-778 (represented by crossed circles), any individual qubit in the lattice arrangement 710 directly connects to a maximum of three other qubits. Although not separately shown, it is understood that any two qubit gate in the lattice arrangement 710 of FIG. 7 directly connects to a maximum of four other qubits.

FIG. 8 shows another lattice arrangement 810 with two-dimensional structures comprising dodecagons, in which coupling (e.g., control) qubits are positioned on the edges between the other (e.g., target) qubits positioned on the vertices. As can be seen from FIG. 8, including by the qubits 884 and 886, any individual qubit in the lattice arrangement directly connects only to a coupling qubit, e.g., the coupling qubit 888. Thus, the same reduced frequency collision statistics described above with reference to FIGS. 4 and 5 apply to the lattice arrangement 810 of FIG. 8.

權(quán)利要求

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