Method and apparatus for controlling qubits with single flux quantum logic
AssigneeNorthrop Grumman Systems Corporation
InventorsJohn Xavier Przybysz, James E. Baumgardner, Aaron A. Pesetski, Donald Lynn Miller, Quentin P. Herr
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Abstract
In one embodiment, the disclosure relates to a method and apparatus for controlling the energy state of a qubit by bringing the qubit into and out of resonance by coupling the qubit to a flux quantum logic gate. The qubit can be in resonance with a pump signal, with another qubit or with some quantum logic gate. In another embodiment, the disclosure relates to a method for controlling a qubit with RSFQ logic or through the interface between RSFQ and the qubit.
Claims16
An apparatus for changing a resonance frequency of a qubit, the apparatus comprising:
- a first circuit having a first qubit;
- a second circuit having a second qubit, the second qubit communicating with the first qubit through at least one capacitor;
- and
- a source for providing an electro-magnetic inductance to the first circuit thereby switching an energy state of the first qubit from a first resonance frequency to a second resonance frequency.
An apparatus for changing a resonance frequency of a qubit, the apparatus comprising:
- a first circuit having a first qubit biased to have a first resonance frequency;
- a second circuit having a second qubit biased to have a second resonance frequency, the first qubit coupled to the second qubit through at least one capacitor;
- and
- a source inductively coupled to the first circuit, the source receiving a flux quantum set input that couples current into the first circuit thereby switching the first qubit from the first resonance frequency to the second resonance frequency coupling energy of the first qubit and the second qubit through the at least one capacitor.
A method for changing a resonance frequency of a qubit, the method comprising:
- providing a first circuit having a first qubit biased to have a first resonance frequency;
- providing a second circuit having a second qubit biased to have a second resonance frequency;
- coupling the first qubit to the second qubit through at least one capacitor;
- and
- coupling current into the first circuit thereby switching the first qubit from the first resonance frequency to the second resonance frequency and coupling energy of the first qubit and the second qubit through the at least one capacitor.
Dependencies are inferred from the claim text.