Tunable superconductor resonator

A method for tuning a superconductor resonator comprising:

• providing a superconductor resonator coil;
• providing a variable capacitance portion electrically coupled to the superconductor resonator coil, the variable capacitance portion including a first superconductor film portion electrically coupled to the superconductor resonator coil and a second superconductor film portion including a superconductor trace;
• varying the electrical capacitance of the variable capacitance portion between a first capacitance state and a second capacitance state, wherein adjusting the variable capacitance portion to its first capacitance state adjusts the superconductor resonator to its first resonant frequency and wherein adjusting the variable capacitance portion to its second capacitance state adjusts the superconductor resonator to its second resonant frequency;
• and
• transitioning the superconductor trace between a superconducting state and a normal (non-superconducting) state, wherein, when the superconductor trace is in its superconducting state, the variable capacitance portion is converted to its first capacitance state, and when the superconductor trace is in its normal state, the variable capacitance portion is converted to its second capacitance state.

An apparatus for tuning a superconductor resonator comprising:

• a superconductor resonator coil;
• a variable capacitance portion electrically coupled to the superconductor resonator coil, the variable capacitance portion including a first superconductor film portion electrically coupled to the superconductor resonator coil, the variable capacitance portion further includes a second superconductor film portion having a superconductor trace;
• a mechanism for varying the capacitance of the variable capacitance portion between a first capacitance and a second capacitance, wherein adjusting the variable capacitance portion to its first capacitance adjusts the superconductor resonator to its first resonant frequency, and wherein adjusting the variable capacitance portion to its second capacitance adjusts the superconductor resonator to its second resonant frequency;
• and
• a mechanism for transitioning the superconductor trace between a superconducting state and a normal (non-superconducting) state, wherein when the superconductor trace is in its superconducting state, the variable capacitance portion is converted to its first capacitance and when the superconductor trace is in its normal state, the variable capacitance portion is converted to its second capacitance.

A method of tuning a tunable superconductor resonator comprising:

• determining that the tunable superconductor resonator requires tuning;
• coarsely tuning the tunable superconductor resonator to within a coarse tuning range;
• and
• finely tuning the tunable superconductor resonator to within a fine tuning range.

A tunable superconductor resonator comprising:

• a superconductor resonator coil;
• and
• a variable capacitance portion that included as a portion of the superconductor resonator coil, wherein the variable capacitance portion can be transitioned between a first capacitance and a second capacitance, and wherein adjusting the variable capacitance portion to its first capacitance adjusts the superconductor resonator to a first resonant frequency, and adjusting the variable capacitance portion to its second capacitance adjusts the superconductor resonator to a second resonant frequency, the variable capacitance portion comprising:
• an electric current source including a first lead and a second lead, wherein the electric current source can produce an electric current from the first lead to the second lead, wherein the first lead is electrically connected to a first axial location on the superconductor resonator coil and the second lead is electrically connected to a second axial location on the superconductor resonator coil, wherein the first axial location is spaced along the superconductor resonator coil from the second axial location.

A dynamically tunable superconductor resonator comprising:

• a superconductor resonator coil;
• and
• a variable capacitance portion that can be transitioned between a first capacitance and a second capacitance, wherein adjusting the variable capacitance portion to its first capacitance adjusts the superconductor resonator to a first resonant frequency and adjusting the variable capacitance portion to its second capacitance state adjusts the superconductor resonator to a second resonant frequency, the variable capacitance portion comprising
• a first superconductor film portion being electrically connected to opposed ends of the superconductor resonator coil,
• a movable substrate having a second superconductor film portion deposited thereon, and
• an actuator, that when actuated, displaces the second superconductor film portion relative to the first superconductor film portions.

A tunable superconductor resonator comprising:

• a superconductor resonator coil;
• and
• a variable capacitance portion that is electrically coupled to the superconductor resonator coil to vary capacitance between a first capacitance and a second capacitance, wherein adjusting the variable capacitance portion to its first capacitance adjusts the superconductor resonator to a first resonant frequency, and wherein adjusting the variable capacitance portion to a second capacitance adjusts the superconductor resonator coil to a second resonant frequency, the variable capacitance portion comprising:
• a first superconductor film portion electrically coupled to a first end of the superconductor resonator coil,
• a second superconductor film portion electrically coupled to a second end of the superconductor resonator coil, the first end of the superconductor resonator coil being on opposite ends of the superconductor resonator coil from the second end of the superconductor resonator coil;
• and
• a third superconductor film portion including a first superconductor portion, a second superconductor portion, and a superconductor trace, the superconductor trace extending between the first superconductor portion and the second superconductor portion, wherein the superconductor trace can be transitioned between a superconducting state and a normal (non-superconducting) state, and wherein the first superconductor portion is capacitively coupled to the first superconductor film portion, the second superconductor portion is capacitively coupled to the second superconductor film portion, and wherein, when the superconductor trace is in its superconducting state, the tunable superconductor resonator resonates at the first resonant frequency, and, when the superconductor trace is in its normal state, the tunable superconductor resonator resonates at the second resonant frequency.

A tunable superconductor resonator comprising:

• a superconductor resonator coil;
• and
• a variable capacitance portion that is electrically coupled to the superconductor resonator coil to vary capacitance between a first capacitance and a second capacitance, wherein adjusting the variable capacitance portion to its first capacitance adjusts the superconductor resonator to a first resonant frequency, and wherein adjusting the variable capacitance portion to its second capacitance adjusts the superconductor resonator to its second resonant frequency, the variable capacitance portion comprising:
• a first superconductor film portion,
• a second superconductor film portion electrically coupled to a first end of the superconductor resonator coil,
• a third semiconductor film portion;
• a superconductor portion and a superconductor trace, the superconductor trace extends between the superconductor portion and the first superconductor film portion, the superconductor trace can transition between a superconducting state and a normal (non-superconducting) state, the first capacitive film portion is capacitively coupled to the third superconductor film portion,
• a common electric junction electrically coupled to the superconductor portion, the common electric junction also being electrically coupled to the second end of the superconductor resonator coil, the second end of the superconductor resonator coil being on opposite ends of the superconductor resonator coil from the first end of the superconductor resonator coil, and
• wherein, when the superconductor trace is in its superconducting state, the tunable superconductor resonator resonates at its first resonant frequency and, when the superconductor trace is in its normal state, the tunable superconductor resonator resonates at its second resonant frequency.