Qubit and readout overlap optimization via dipole orientation
A device includes a first set of circuit components implementing a qubit and a second set of circuit components implementing a readout resonator for reading out a state of the qubit. A first footprint of the first set of circuit components overlaps a second footprint of the second set of circuit components. The first footprint is oriented relative to the second footprint based on a first electric dipole of the first set of circuit components and a second electric dipole of the second set of circuit components.
1 . A device comprising:
a first set of circuit components implementing a qubit; and
a second set of circuit components coupled to the first set of circuit components, the second set of circuit components implementing a readout resonator for reading out a state of the qubit,
wherein:
a first footprint of the first set of circuit components overlaps a second footprint of the second set of circuit components, and
the first footprint is oriented relative to the second footprint based on a first electric dipole of the first set of circuit components and a second electric dipole of the second set of circuit components.
2 . The device of claim 1 , further comprising a substrate and an interposer, wherein the first footprint is on a first surface of the substrate and the second footprint is on a first surface of an interposer.
3 . The device of claim 1 , further comprises a substrate, wherein:
the first footprint is on a first surface of the substrate, and
the second footprint is on a second surface of the substrate.
4 . The device of claim 1 , wherein the first electric dipole of the qubit and the second electric dipole of the readout resonator are orthogonal.
5 . The device of claim 4 , wherein the first and second footprints are oriented to substantially minimize a coupling effect between the qubit and the readout resonator.
6 . The device of claim 1 , wherein the first and second footprints are oriented to enhance a coupling effect between the qubit and the readout resonator.
7 . The device of claim 6 , wherein the coupling effect between the qubit and the readout resonator is sufficient to provide a state of the qubit to the readout resonator.
8 . The device of claim 6 , wherein the first electric dipole of the qubit and the second electric dipole of the readout resonator are parallel.
9 . A method comprising:
implementing a qubit at a first set of circuit components;
implementing a readout resonator at a second set of circuit components for reading out a state of the qubit;
overlapping a first footprint of the first set of circuit components with a second footprint of the second set of circuit components; and
orienting the first footprint relative to the second footprint based on a first electric dipole of the first set of circuit components and a second electric dipole of the second set of circuit components.
10 . The method of claim 9 , further comprising providing a substrate and an interposer, wherein the first footprint is on a first surface of the substrate and the second footprint is on a first surface of the interposer.
11 . The method of claim 9 , further comprising:
providing a substrate:
arranging the first footprint on a first surface of the substrate; and
arranging the second footprint on a second surface of the substrate.
12 . The method of claim 9 , further comprising substantially minimizing a coupling effect between the qubit and the readout resonator by orienting the first and second footprints.
13 . The method of claim 9 , further comprising arranging the first electric dipole of the qubit and the second electric dipole of the readout resonator to be orthogonal.
14 . The method of claim 9 , further comprising enhancing coupling effect between the qubit and the readout resonator by orienting the first and second footprints.
15 . The method of claim 14 , further comprising using the coupling effect between the qubit and the readout resonator to read the state of the qubit.
16 . The method of claim 14 , wherein the qubit and the readout resonator do not share physical electrical contact.
17 . The method of claim 14 , wherein the first electric dipole of the qubit and the second electric dipole of the readout resonator are parallel.