Microwave integrated quantum circuits with VIAS and methods for making the same
First Claim
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1. A quantum computing system comprising:
- a quantum circuit device having at least one operating frequency;
a first substrate having a first surface on which the quantum circuit device is disposed; and
electrically conducting vias each extending through the first substrate outside of a footprint of the quantum circuit device,wherein the vias are arranged to suppress propagation of electromagnetic waves that have frequencies below a cutoff frequency, the cutoff frequency being larger than the operating frequency;
a set of three or more other electrically conducting vias each extending through the first substrate outside of the footprint of the quantum circuit device, wherein the other electrically conducting vias form respective vertices of a polygon; and
a signal line that includes a first via that extends through the first substrate and is inscribed in the polygon, wherein the signal line is electromagnetically coupled with the quantum circuit device to carry, during operation of the quantum computing system, a control signal to, or a readout signal from, the quantum circuit device.
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Abstract
A quantum computing system includes a quantum circuit device, a substrate having a first surface on which the quantum processing device is disposed, and one or more vias each extending through the substrate. The vias include a material that is a superconducting material during operation of the quantum computing system.
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Citations
77 Claims
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1. A quantum computing system comprising:
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a quantum circuit device having at least one operating frequency; a first substrate having a first surface on which the quantum circuit device is disposed; and electrically conducting vias each extending through the first substrate outside of a footprint of the quantum circuit device, wherein the vias are arranged to suppress propagation of electromagnetic waves that have frequencies below a cutoff frequency, the cutoff frequency being larger than the operating frequency; a set of three or more other electrically conducting vias each extending through the first substrate outside of the footprint of the quantum circuit device, wherein the other electrically conducting vias form respective vertices of a polygon; and a signal line that includes a first via that extends through the first substrate and is inscribed in the polygon, wherein the signal line is electromagnetically coupled with the quantum circuit device to carry, during operation of the quantum computing system, a control signal to, or a readout signal from, the quantum circuit device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A quantum computing system comprising:
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a quantum circuit device having at least one operating frequency; a first substrate having a first surface on which the quantum circuit device is disposed; and electrically conducting vias each extending through the first substrate outside of a footprint of the quantum circuit device, wherein the vias are arranged to suppress propagation of electromagnetic waves that have frequencies below a cutoff frequency, the cutoff frequency being larger than the operating frequency; a second substrate having a first surface that defines a recess of the second substrate, the first and second substrates being arranged such that the recess of the second substrate forms an enclosure that houses the quantum circuit device; an electrically conducting layer that covers at least a portion of the recess of the second substrate, wherein the recess of the second substrate is configured to suppress inside the recess propagation of the electromagnetic waves that have frequencies below the cutoff frequency; another quantum circuit device having at least one other operating frequency; a third substrate having a first surface onto which the other quantum circuit device is disposed; and other electrically conductive vias each extending through the third substrate outside of a footprint of the other quantum circuit device, the other vias being arranged to suppress, across a volume of the third substrate that is adjacent to the footprint of the other quantum circuit device, propagation of electromagnetic waves that have frequencies below another cutoff frequency, the other cutoff frequency being larger than the other operating frequency, wherein the first substrate (i) has a second surface opposing the first surface that defines a recess of the first substrate, and (ii) is sandwiched between the second substrate and the third substrate, the first and third substrates being arranged such that the recess of the first substrate forms another enclosure that houses the other quantum circuit device; wherein the quantum computing system further comprises another electrically conducting layer that covers at least a portion of the recess of the first substrate, the recess of the first substrate being configured to suppress inside the recess propagation of the electromagnetic waves that have frequencies below the other cutoff frequency; and a coupling line that includes an electrically conductive via extending through the first substrate, the other quantum circuit device being electromagnetically coupled with the quantum circuit device through the coupling line. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A quantum computing system comprising:
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a quantum circuit device; a substrate having a first surface on which the quantum circuit device is disposed; one or more vias each extending through the substrate, wherein the vias comprise a material that is a superconducting material during operation of the quantum computing system; a set of three or more other electrically conducting vias each extending through the substrate outside of a footprint of the quantum circuit device, wherein the other electrically conducting vias form respective vertices of a polygon; and a signal line that includes a first via that extends through the substrate and is inscribed in the polygon, wherein the signal line is electromagnetically coupled with the quantum circuit device to carry, during operation of the quantum computing system, a control signal to, or a readout signal from, the quantum circuit device. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A quantum computing system comprising:
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a quantum circuit device having at least one operating frequency; a first substrate having a first surface on which the quantum circuit device is disposed; electrically conducting vias each extending through the first substrate outside of a footprint of the quantum circuit device, wherein the vias are arranged to suppress propagation of electromagnetic waves that have frequencies below a cutoff frequency, the cutoff frequency being larger than the operating frequency; a second substrate having a first surface that defines a recess of the second substrate, the first and second substrates being arranged such that the recess of the second substrate forms an enclosure that houses the quantum circuit device; and an electrically conducting layer that covers at least a portion of the recess of the second substrate, wherein the recess of the second substrate is configured to suppress inside the recess propagation of the electromagnetic waves that have frequencies below the cutoff frequency, wherein the electrically conducting layer is grounded during operation of the quantum computing system. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56, 58)
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57. A quantum computing system comprising:
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a quantum circuit device; a first substrate having a first surface on which the quantum circuit device is disposed;
one or more vias each extending through the first substrate, wherein the vias comprise a material that is a superconducting material during operation of the quantum computing system;a second substrate having a first surface that defines a recess of the second substrate, the first and second substrates being arranged such that the recess of the second substrate forms an enclosure that houses the quantum circuit device; and an electrically conducting layer that covers at least a portion of the recess of the second substrate, wherein the electrically conducting layer is grounded during operation of the quantum computing system. - View Dependent Claims (59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77)
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Specification