Microwave photon control device, microwave photon transmitter, microwave photon receiver, microwave photon repeater, and quantum computer
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United States of America
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Dec 31, 2024
Grant Date -
Nov 24, 2022
app pub date -
Dec 28, 2020
filing date -
Dec 28, 2020
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Abstract
A microwave photon control device includes a first qubit and a second qubit that are connected in parallel to a waveguide through which microwave photons propagate, and a direct coupling between the first qubit and the second qubit. An interval between the first qubit and the second qubit is (¼+n/2) times as long as a wavelength of microwave photons (where n is an integer equal to or larger than 0). A quantum entangled state is formed between the first qubit and the second qubit. The direct coupling cancels out a coupling via the waveguide between the first qubit and the second qubit. By a relaxation rate of the first qubit and the second qubit, and a phase of the quantum entangled state being controlled, the microwave photon control device operates while switching between a first operation mode, a second operation mode, and a third operation mode.
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