Intel Corporation

Jong Seok Park

Stefano Pellerano

Christopher Hull

Yanjie J Wang

Sushil Subramanian

Ravi Pillarisetty

Jeanette M Roberts

Hubert C George

Lester Lampert

Thomas Francis Watson

Shavindra Premaratne

Todor Mladenov

Florian Luethi

Felix Frederic Leonhard Borjans

Simon Schaal

Quantum circuit assemblies that employ active pulse shaping in order to be able to control states of a plurality of qubits with signal pulses propagated over a shared signal propagation channel are disclosed. An example quantum circuit assembly includes a quantum circuit component that includes a first qubit, associated with a first frequency to control the state of the first qubit, and a second qubit, associated with a second frequency to control the state of the second qubit. A shared transmission channel is coupled to the first and second qubits. The assembly further includes a signal pulse generation circuit, configured to generate a signal pulse to be propagated over the shared transmission channel to control the state of the first qubit, where the signal pulse has a center frequency at the first frequency, a bandwidth that includes the second frequency, and a notch at the second frequency.

Scalable gate control in quantum circuit assemblies

An array of quantum dot qubits (e.g., an array of spin qubits) relies on a gradient magnetic field to ensure that the qubits are separated in frequency in order to be individually addressable. Furthermore, a strong magnetic field gradient is required to electrically drive the electric dipole spin resonance (EDSR) of the qubits. Quantum dot devices disclosed herein use microcoil arrangements for providing a gradient magnetic field, the microcoil arrangements integrated on the same chip (e.g., on the same die or wafer) as quantum dot qubits themselves. Unlike previous approaches to quantum dot formation and manipulation, various embodiments of the quantum dot devices disclosed herein may enable improved control over magnetic fields and their gradients to realize better frequency targeting of individual qubits, help minimize adverse effects of charge noise on qubit decoherence and provide good scalability in the number of quantum dots included in the device.

Quantum dot based qubit devices with on-chip microcoil arrangements

A communication device includes a power amplifier that generates power signals according to one or more operating bands of communication data, with the amplitude being driven and generated in output stages of the power amplifier. The final stage can include an output passive network that suppresses suppress an amplitude modulation-to-phase modulation (AM-PM) distortion. During a back-off power mode a bias of a capacitive unit of the output power network component can be adjusted to minimize an overall capacitance variation. An output passive network can further generate a flat-phase response between dual resonances of operation.

Ultra compact multi-band transmitter with robust AM-PM distortion self-suppression techniques

A communication device includes a power amplifier that generates power signals according to one or more operating bands of communication data, with the amplitude being driven and generated in output stages of the power amplifier. The final stage can include an output passive network that suppresses suppress an amplitude modulation-to-phase modulation (AM-PM) distortion. During a back-off power mode a bias of a capacitive unit of the output power network component can be adjusted to minimize an overall capacitance variation. A output passive network can further generate a flat-phase response between dual resonances of operation.

An example quantum circuit assembly includes a quantum circuit component with a plurality of qubits operable by selectively applying control signals to various terminals of the qubits. The assembly further includes an array of analog memory cells, a DAC configured to sequentially generate analog values/signals to be stored in different ones of the analog memory cells, and a switching arrangement configured to selectively apply control signals to various ones of qubit terminals, where each control signal is applied by the switching arrangement electrically connecting an output terminal of a different analog memory cell of the array of analog memory cells to one of the qubit terminals. Performing digital-to-analog conversion ahead of performing qubit operations and storing results of the conversion in different analog memory cells allows pre-generating and storing analog voltages required for qubit operations that may be carried out during the qubit coherence time.

Quantum circuit assembly with a digital-to-analog converter and an array of analog memory cells

Ultra compact multi-band transmitted with robust AM-PM distortion self-suppression techniques

A communication device includes a power amplifier that generates power signals according to one or more operating bands of communication data, with the amplitude being driven and generated in output stages of the power amplifier. The final stage can include an output passive network that suppresses an amplitude modulation-to-phase modulation (AM-PM) distortion. During a back-off power mode a bias of a capacitive unit of the output power network component can be adjusted to minimize an overall capacitance variation. The output passive network can further generate a flat-phase response between dual resonances of operation.

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Hillsboro, OR, United States of America

Jong Seok Park