Abstract: Embodiments of the present invention disclose a computer system having a plurality of quantum circuits arranged in a two-dimensional plane-like structure, the quantum circuits comprising qubits and busses (i.e., qubit-qubit interconnects), and a method of formation therefor. A quantum computer system comprises a plurality of quantum circuits arranged in a two-dimensional pattern. At least one interior quantum circuit, not along the perimeter of the two-dimensional plane of the plurality of quantum circuits, contains a bottom chip, a device layer, a top chip, and a routing layer. A signal wire connects the device layer to the routing layer, wherein the signal wire breaks the two dimensional plane, for example, the signal wire extends into a different plane.

Abstract: Techniques and a system for quantum computing device modeling and design are provided. In one example, a system includes a modeling component and a simulation component. The modeling component models a quantum device element of a quantum computing device as an electromagnetic circuit element to generate electromagnetic circuit data for the quantum computing device. The simulation component simulates the quantum computing device using the electromagnetic circuit data to generate response function data indicative of a response function for the quantum computing device. Additionally or alternatively, a Hamiltonian is constructed based on the response function.

Abstract: Embodiments of the present invention disclose a computer system having a plurality of quantum circuits arranged in a two-dimensional plane-like structure, the quantum circuits comprising qubits and busses (i.e., qubit-qubit interconnects), and a method of formation therefor. A quantum computer system comprises a plurality of quantum circuits arranged in a two-dimensional pattern. At least one interior quantum circuit, not along the perimeter of the two-dimensional plane of the plurality of quantum circuits, contains a bottom chip, a device layer, a top chip, and a routing layer. A signal wire connects the device layer to the routing layer, wherein the signal wire breaks the two dimensional plane, for example, the signal wire extends into a different plane.

Abstract: Embodiments of the present invention disclose a computer system having a plurality of quantum circuits arranged in a two-dimensional plane-like structure, the quantum circuits comprising qubits and busses (i.e., qubit-qubit interconnects), and a method of formation therefor. A quantum computer system comprises a plurality of quantum circuits arranged in a two-dimensional pattern. At least one interior quantum circuit, not along the perimeter of the two-dimensional plane of the plurality of quantum circuits, contains a bottom chip, a device layer, a top chip, and a routing layer. A signal wire connects the device layer to the routing layer, wherein the signal wire breaks the two dimensional plane, for example, the signal wire extends into a different plane.

Abstract: The invention includes methods, and the structures formed, for multi-qubit chips. The methods may include annealing a Josephson junction of a qubit to either increase or decrease the frequency of the qubit. The conditions of the anneal may be based on historical conditions, and may be chosen to tune each qubit to a desired frequency.

Abstract: Techniques relate to reading a qubit coupled to a microwave resonator. A microwave signal at a microwave resonator frequency is input to the microwave resonator that couples to the qubit. A microwave readout signal from the microwave resonator is output to a microwave to optical converter. The microwave readout signal includes a qubit state of the qubit. The microwave to optical converter is configured to convert the microwave readout signal to an optical signal. In response to the optical signal being output by the microwave to optical converter, it is determined that the qubit is in a predefined qubit state. In response to no optical signal being output by the microwave to optical converter, it is determined that the qubit is not in the predefined qubit state.

Abstract: A technique relates to communication of a quantum state. Polarization hardware is configured to receive a polarization encoded qubit and split the polarization encoded qubit into two qubits. A converter is coupled to the polarization hardware, and the converter is configured to convert the two qubits into a form suitable for a CNOT gate. The CNOT gate is configured to receive the two qubits such that a measurement result of a CNOT operation of the CNOT gate determines success of the communication of the quantum state.

Abstract: A technique relates to communication of a quantum state. Polarization hardware is configured to receive a polarization encoded qubit and split the polarization encoded qubit into two qubits. A converter is coupled to the polarization hardware, and the converter is configured to convert the two qubits into a form suitable for a CNOT gate. The CNOT gate is configured to receive the two qubits such that a measurement result of a CNOT operation of the CNOT gate determines success of the communication of the quantum state.

Abstract: Transducers and methods of making the same include a substrate having a cavity with a diameter that supports whispering gallery modes at a frequency of an input signal. A focusing structure in the cavity focuses the electric field of the input signal. A resonator directly under the focusing structure has a crystalline structure that generates an electro-optic effect when exposed to electrical fields. An electric field of the input signal modulates an output signal in the resonator via the electro-optic effect.

Abstract: Transducers and methods of making the same include a substrate having a cavity with a diameter that supports whispering gallery modes at a frequency of an input signal. A focusing structure in the cavity focuses the electric field of the input signal. A resonator directly under the focusing structure has a crystalline structure that generates an electro-optic effect when exposed to electrical fields. An electric field of the input signal modulates an output signal in the resonator via the electro-optic effect.

Abstract: Techniques relate to reading a qubit coupled to a microwave resonator. A microwave signal at a microwave resonator frequency is input to the microwave resonator that couples to the qubit. A microwave readout signal from the microwave resonator is output to a microwave to optical converter. The microwave readout signal includes a qubit state of the qubit. The microwave to optical converter is configured to convert the microwave readout signal to an optical signal. In response to the optical signal being output by the microwave to optical converter, it is determined that the qubit is in a predefined qubit state. In response to no optical signal being output by the microwave to optical converter, it is determined that the qubit is not in the predefined qubit state.

Abstract: Transducers and methods of making the same include a substrate having a cavity with a diameter that supports whispering gallery modes at a frequency of an input signal. A focusing structure in the cavity focuses the electric field of the input signal. A resonator directly under the focusing structure has a crystalline structure that generates an electro-optic effect when exposed to electrical fields. An electric field of the input signal modulates an output signal in the resonator via the electro-optic effect.

Abstract: Transducers and methods of making the same include a substrate having a cavity with a diameter that supports whispering gallery modes at a frequency of an input signal. A focusing structure in the cavity focuses the electric field of the input signal. A resonator directly under the focusing structure has a crystalline structure that generates an electro-optic effect when exposed to electrical fields. An electric field of the input signal modulates an output signal in the resonator via the electro-optic effect.

Abstract: Transducers and methods of making the same include a substrate having a cavity with a diameter that supports whispering gallery modes at a frequency of an input signal. A focusing structure in the cavity focuses the electric field of the input signal. A resonator directly under the focusing structure has a crystalline structure that generates an electro-optic effect when exposed to electrical fields. An electric field of the input signal modulates an output signal in the resonator via the electro-optic effect.

Abstract: Transducers and methods of making the same include a substrate having a cavity with a diameter that supports whispering gallery modes at a frequency of an input signal. A focusing structure in the cavity focuses the electric field of the input signal. A resonator directly under the focusing structure has a crystalline structure that generates an electro-optic effect when exposed to electrical fields. An electric field of the input signal modulates an output signal in the resonator via the electro-optic effect.

Abstract: A technique relates to a microwave device. A qubit is connected to a first end of a first coupling capacitor and a first end of a second coupling capacitor. A resonator is connected to a second end of the first coupling capacitor and a second end of the second coupling capacitor. The resonator includes a fundamental resonance mode. A filter is connected to both the qubit and the first end of the first or second coupling capacitor.

Abstract: A technique relates to a microwave device. A qubit is connected to a first end of a first coupling capacitor and a first end of a second coupling capacitor. A resonator is connected to a second end of the first coupling capacitor and a second end of the second coupling capacitor. The resonator includes a fundamental resonance mode. A filter is connected to both the qubit and the first end of the first or second coupling capacitor.

Abstract: An electro-optical system for exchanging quantum information between optical qubits and including a superconductive microwave cavity; an electro-optical material; a superconductive qubit circuit formed on the electro-optical material including a superconductive qubit; a dipole antenna, formed on the electro-optical material for directly coupling the superconductive qubit to the superconductive microwave cavity; an optical input for receiving input optical photons; a microwave input for receiving input microwave photons; and an optical output for outputting modulated optical photons, wherein a frequency and a phase of the optical photon is modulated with a state of the superconducting qubit by the dipole antenna.

Abstract: An electro-optical system for exchanging quantum information between optical qubits and including a superconductive microwave cavity; an electro-optical material: a superconductive qubit circuit formed on the electro-optical material including a superconductive qubit; a dipole antenna, formed on the electro-optical material for directly coupling the superconductive qubit to the superconductive microwave cavity; an optical input for receiving input optical photons; a microwave input for receiving input microwave photons; and an optical output for outputting modulated optical photons, wherein a frequency and a phase of the optical photon is modulated with a state of the superconducting qubit by the dipole antenna.