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US 2024/0178844 A1Published application
Quantum computation device and operation thereof
AssigneesTaiwan Semiconductor Manufacturing Company, Ltd., National Taiwan University
InventorsHsi-Sheng GOAN, Chia-Hsien HUANG
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Abstract
A method is provided, including: applying a magnetic field according to a two-qubit gate operation performed with a quantum device; transmitting a voltage signal to a gate structure, arranged above first and second quantum dots in the quantum device, to generate a coupling signal that includes a first sine squared wave; and performing, by the magnetic field and the coupling signal, the two-qubit gate operation to the first and second qubits in the first and second quantum dots.
Claims20
A method, comprising:
- applying a magnetic field according to a two-qubit gate operation performed with a quantum device;
- transmitting a voltage signal to a gate structure, arranged above first and second quantum dots in the quantum device, to generate a coupling signal that comprises a first sine squared wave;
- and
- performing, by the magnetic field and the coupling signal, the two-qubit gate operation to first and second qubits in the first and second quantum dots.
1 more element
A method, comprising:
- providing qubits which correspond to quantum dots in a quantum device, with a first control signal comprising a combination of sinm pulses, m being an even integer, and a second control signal comprising a symmetric composite portion, the symmetric composite portion being symmetric with respect to a middle time point of the symmetric composite portion;
- performing, in response to the first control signal and the second control signal, a quantum gate operation to the qubits;
- evaluating an infidelity of the quantum gate operation;
- and
- modifying, according to the infidelity, the first control signal and the second control signal, for performing a further quantum gate operation to the qubits.
2 more elements
A method, comprising:
- loading, in response to a plurality of voltage signals applied on a plurality of gate structures in a quantum device, a first electron and a second electron from a reservoir region into a first quantum dot and a second quantum dot that are in the quantum device, wherein the first and second quantum dots are underneath first and second gate structures in the plurality of gate structures, and the reservoir region is underneath a third gate structure in the plurality of gate structures;
- and
- performing a first quantum gate operation to modulate a spin of the first electron, a spin of the second electron, or a combination thereof by simultaneously applying a coupling signal and a magnetic field to the first and second quantum dots, wherein the coupling signal comprises a first sine squared wave and is generated in response to a first voltage signal, in the plurality of voltage signals, applied on a fourth gate structure, in the plurality of gate structures, interposed between the first and second gate structures.
Dependencies are inferred from the claim text.