Abstract: A superconducting quantum computing circuit package (1). The package contains a substrate (2) on which a circuit is formed, the circuit including a plurality of circuit elements. The substrate (2) includes holes (8) arranged between the circuit elements which extend through a thickness of the substrate (2). The package also contains a holder (3) with a surface (9) on which the substrate (2) is received, and a cover (4) arranged on an opposite side of the substrate (2). The holder (3) and the cover (4) are formed from a metal and/or a superconductor. The holder (3) also contains projections (12) arranged on and projecting from the surface (9). The projections (12) protrude through the holes (8) in the substrate (2) and contact the cover (4) so to suppress electromagnetic modes in the frequency range of operation of the quantum computing circuit.

Abstract: A superconducting quantum computing circuit package (1). The package contains a substrate (2) on which a circuit is formed, the circuit including a plurality of circuit elements. The substrate (2) includes holes (8) arranged between the circuit elements which extend through a thickness of the substrate (2). The package also contains a holder (3) with a surface (9) on which the substrate (2) is received, and a cover (4) arranged on an opposite side of the substrate (2). The holder (3) and the cover (4) are formed from a metal and/or a superconductor. The holder (3) also contains projections (12) arranged on and projecting from the surface (9). The projections (12) protrude through the holes (8) in the substrate (2) and contact the cover (4) so to suppress electromagnetic modes in the frequency range of operation of the quantum computing circuit.

Abstract: A building block for a quantum information processing system includes a superconducting qubit having a Josephson junction connected between two superconducting electrodes. The two superconducting electrodes are coaxial and coplanar. The building block also includes a control line coupled to the superconducting qubit and arranged to control the state of the superconducting qubit, and/or a readout element coupled to the superconducting qubit and arranged to measure the state of the superconducting qubit. The control line and/or the readout element are arranged out of plane with respect to the two superconducting electrodes.

Abstract: A building block for a quantum information processing system includes a superconducting qubit having a Josephson junction connected between two superconducting electrodes. The two superconducting electrodes are coaxial and coplanar. The building block also includes a control line coupled to the superconducting qubit and arranged to control the state of the superconducting qubit, and/or a readout element coupled to the superconducting qubit and arranged to measure the state of the superconducting qubit. The control line and/or the readout element are arranged out of plane with respect to the two superconducting electrodes.

Abstract: A building block (1) for a quantum information processing system includes a superconducting qubit (2) having a Josephson junction (5) connected between two superconducting electrodes (3, 4). The two superconducting electrodes (3, 4) are coaxial and coplanar. The building block (1) also includes a control line (6) coupled to the superconducting qubit (2) and arranged to control the state of the superconducting qubit (2), and/or a readout element (8) coupled to the superconducting qubit (2) and arranged to measure the state of the superconducting qubit (2). The control line (6) and/or the readout element (8) are arranged out of plane with respect to the two superconducting electrodes (3, 4).

Abstract: A building block (1) for a quantum information processing system includes a superconducting qubit (2) having a Josephson junction (5) connected between two superconducting electrodes (3, 4). The two superconducting electrodes (3, 4) are coaxial and coplanar. The building block (1) also includes a control line (6) coupled to the superconducting qubit (2) and arranged to control the state of the superconducting qubit (2), and/or a readout element (8) coupled to the superconducting qubit (2) and arranged to measure the state of the superconducting qubit (2). The control line (6) and/or the readout element (8) are arranged out of plane with respect to the two superconducting electrodes (3, 4).