An interface for communicating with qubits, the interface including one or more splitters splitting a plurality of signals from a modulated optical carrier and outputting the signals to a plurality of outputs. In one example, the signals include a plurality of different input signals used for exciting or controlling the one or more qubits. In another example, the signals include a plurality of output signals received from the one or more qubits, wherein the output signals used to read one or more states of the one or more qubits.

A system, method, diagnostic and container delivery system for manipulating a target, by manipulating with the quantum coherence of the target. The method includes identifying intrinsic parameters of the target and determining target-tuned design factors based at least partially on the intrinsic parameters. Target-tuned electrons and respective associate fields are generated based in part on the target-tuned design factor. The target-tuned electrons are transformed the from an unquantized state into target-tuned artificial atoms with quantized energy levels. The method may include preparing a container to carry the unquantized target-tuned electrons, the container being composed of superconductor quantum dots. The unquantized target-tuned electrons are transferred to the container to form the target-tuned artificial atoms having quantized target-tuned electrons, which may be delivered to the target as a manipulating agent. Alternatively, the unquantized target-tuned electrons may be delivered directly to the subject.

A quantum information processing device including a semiconductor substrate. An optical resonator is coupled to the substrate. The optical resonator supports a first photonic mode with a first resonator frequency. The quantum information processing device includes a non-gaseous chalcogen donor atom disposed within the semiconductor substrate and optically coupled to the optical resonator. The donor atom has a transition frequency in resonance with the resonator frequency. Also disclosed herein are systems, devices, articles and methods with practical application in quantum information processing including or associated with one or more deep impurities in a silicon substrate optically coupled to an optical structure.

A system, method, diagnostic and container delivery system for manipulating a target, by manipulating with the quantum coherence of the target. The method includes identifying intrinsic parameters of the target and determining target-tuned design factors based at least partially on the intrinsic parameters. Target-tuned electrons and fields are generated based in part on the target-tuned design factor. The target-tuned electrons and fields are defined by discrete quantized energy levels. The method may include preparing a container to carry the unquantized target-tuned electrons, the container being composed of superconductor quantum dots. The unquantized target-tuned electrons are transferred to the container to form target-tuned artificial atoms having quantized target-tuned electrons, which may be delivered to the target as a manipulating agent. Alternatively, the unquantized target-tuned electrons may be delivered directly to the subject.

A quantum computing system and methods for performing fault-tolerant quantum computing. A fusion controller sequentially performs a series of fusion measurements on different fusion sites of a plurality of fusion sites to obtain a respective series of classical measurement results. The series of fusion measurements is performed on quantum modes of a logical qubit. For respective fusion measurements of the series of fusion measurements, a basis for performing the respective fusion measurement is selected based on classical measurement results of previous fusion measurements. The series of classical measurement results are in the memory medium.

A quantum information processing device including a semiconductor substrate. An optical resonator is coupled to the substrate. The optical resonator supports a first photonic mode with a first resonator frequency. The quantum information processing device includes a non-gaseous chalcogen donor atom disposed within the semiconductor substrate and optically coupled to the optical resonator. The donor atom has a transition frequency in resonance with the resonator frequency. Also disclosed herein are systems, devices, articles and methods with practical application in quantum information processing including or associated with one or more deep impurities in a silicon substrate optically coupled to an optical structure.

Systems and techniques that facilitate controlling TLS via on-chip filtering to prevent qubit energy loss are provided. In various embodiments, a system can comprise a quantum device including a qubit device on a substate. In various embodiments, the quantum device can include an electrode placed in proximity to the qubit device. In various embodiments, an electrical filter can be connected to the electrode. In various embodiments, the quantum device can comprise a voltage source that can be connected to the electrode via the electrical filter. In various embodiments, the voltage source can control a voltage to the electrode to shift a resonant frequency of one or more defects to reduce two level system (TLS) impact on the qubit device.

Described herein relates to an antenna-coupled graphene Josephson-junction THz/mm-wave apparatus (hereinafter video) detector apparatus and methods thereof. Highly sensitive, broadly tunable detectors may be needed for future sensing applications and quantum information systems. In an embodiment, the video detector apparatus may comprise stacked graphene sheets having a magic twist angle between their in-plane symmetry axes. As such, the material may display superconductivity with at least 2 K transition temperature. Additionally, the video detector apparatus may depend on the decrease in the maximum zero-voltage DC current when AC current is driven through the junction.

Electrical communication between a sample (such as a quantum chip, semiconductor sample etc.) in a low temperature environment and an external device is affected via signal lines printed on rigid printed circuit board (PCB) located within a region of the low temperature environment (e.g., a non-uniform magnetic field region). One example application is performing a measurement of an electrical property of the sample at a low signal frequency with a short measurement integration time, although the subject matter is not limited in this respect. Another application is routing an electrical control signal to the sample.

Methods for fabricating optically active quantum memories into quantum-grade diamond thin films and then bonding them to semiconductor substrates are described. Semiconductor substrates are optically and electronically functionalized in preparation for using a flip-chip bonding technique to bond the functionalized substrates to overgrown diamond thin films that host color centers. By purposefully growing quantum-grade diamond thin films and implanting them with color centers separately from fabrication processes that functionalize the substrates, the high quality, purity, and crystallinity of the thin films are preserved, while also allowing for further customization of the types of color centers that are implanted into the diamond.