Abstract: An N-dimensional scan of a set of bias voltages is performed, each bias voltage defining a voltage of a corresponding electrode of a set of electrodes, the electrodes being proximate to a given qubit. A sensitivity of a performance of the given qubit to an electronic field generated by each of the electrodes is determined. A probable location of at least one two-level system (TLS) is extrapolated based on the determined sensitivities. An effect of the two-level system (TLS) on the given qubit is mitigated based on the extrapolated location.

Abstract: 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.

Abstract: A system includes a cable passing from a first plate to a second plate via an intermediate plate, an attachment coupling the cable to the intermediate plate, and a conductive cladding connected to an outer surface of the cable and extended a first length from the attachment toward the second plate. The total length of the thermally conductive cladding is larger than the total length of the attachment, and the cable is thermally connected to the first plate, the second plate, and the intermediate plate.

Abstract: 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.

Abstract: A system includes a cable passing from a first plate to a second plate via an intermediate plate, an attachment coupling the cable to the intermediate plate, and a conductive cladding connected to an outer surface of the cable and extended a first length from the attachment toward the second plate. The total length of the thermally conductive cladding is larger than the total length of the attachment, and the cable is thermally connected to the first plate, the second plate, and the intermediate plate.

Abstract: One or more systems, devices, methods of use and/or methods of fabrication provided herein relate to a superconducting device that can be operated with minimal electric field energy coupling at surface layers of the superconducting device and/or that can have a small footprint. According to one embodiment, a device can comprise a Josephson junction located between a first capacitor portion and a second capacitor portion of a capacitor, wherein at least a trenched section of the first capacitor portion is located beneath a surface of a substrate, and wherein at least a trenched section of the second capacitor portion is located beneath the surface of the substrate. According to another embodiment, a device can comprise a capacitor disposed within a substrate layer and the capacitor comprising a pair of material-filled trenches in the substrate layer, and a Josephson junction coupled to the capacitor.

Abstract: One or more systems, devices, methods of use and/or methods of fabrication provided herein relate to a superconducting device that can be operated with minimal electric field energy coupling at surface layers of the superconducting device and/or that can have a small footprint. According to one embodiment, a device can comprise a Josephson junction located between a first capacitor portion and a second capacitor portion of a capacitor, wherein at least a trenched section of the first capacitor portion is located beneath a surface of a substrate, and wherein at least a trenched section of the second capacitor portion is located beneath the surface of the substrate. According to another embodiment, a device can comprise a capacitor disposed within a substrate layer and the capacitor comprising a pair of material-filled trenches in the substrate layer, and a Josephson junction coupled to the capacitor.

Abstract: Techniques regarding shielded superconducting qubits are provided. For example, one or more embodiments described herein can include an apparatus that can comprise a superconducting qubit positioned adjacent to a superconducting ground plane on a substrate. Also, the apparatus can comprise a superconducting shield layer positioned between the superconducting qubit and the superconducting ground plane.

Abstract: A magnetic resonance force detection apparatus, comprising a sample carrier for carrying a sample to be tested, a magnetic field source and a support for supporting either the sample carrier or the magnetic field source. The magnetic field source is configured to expose the sample to a magnetic field by simultaneously providing a plurality of volumes in which the magnetic field is configured to cause the spins of one or more nuclei or electrons in the sample to flip, and wherein the flipping of spins exerts a force on the support. The apparatus also comprises a support displacement measuring sensor configured to measure the displacement of the support and generate a signal representative of the displacement of the support, and a processor configured to process the signal representative of the displacement of the support in order to determine a component of the displacement of the support caused by one or more of the plurality of volumes.

Abstract: A magnetic resonance force detection apparatus, comprising a sample carrier for carrying a sample to be tested, a magnetic field source and a support for supporting either the sample carrier or the magnetic field source. The magnetic field source is configured to expose the sample to a magnetic field by simultaneously providing a plurality of volumes in which the magnetic field is configured to cause the spins of one or more nuclei or electrons in the sample to flip, and wherein the flipping of spins exerts a force on the support. The apparatus also comprises a support displacement measuring sensor configured to measure the displacement of the support and generate a signal representative of the displacement of the support, and a processor configured to process the signal representative of the displacement of the support in order to determine a component of the displacement of the support caused by one or more of the plurality of volumes.

Abstract: An apparatus using a resonator probe for determining an electronic property of a conductor across a dielectric. The apparatus has a device for inducing lateral mechanical oscillations of the resonator probe and a voltage source for producing a voltage difference between the resonator probe and the conductor to create an electronic drag between the conductor and resonator probe, thus damping the mechanical oscillations of the probe. The electronic property, such as charge carrier mobility, surface resistance, charge carrier lifetime and the number of charge carriers is determined from the damping experienced by the probe.

Abstract: An optical disk drive uses an air-bearing slider that supports a solid immersion lens (SIL) with a patterned thin film formed at the focus of the SIL to act as a secondary radiation source. The thin film is patterned to define either an "aperture" or a "scatterer", both of which localize the interaction of the disk drive's incident light beam with the underlying optical disk to create an effectively smaller light spot. In one embodiment the patterned thin film is opaque with a small aperture having a diameter less than the wavelength of the incident light beam. The aperture localizes the transmission of the incident light beam to the area of the aperture and generates an evanescent field that interacts with the optical disk. In a second embodiment, the patterned thin film is metallic and formed as dot that serves as a scatterer. The scatterer acts as an antenna or secondary light source to locally reradiate a portion of the incident light beam to the optical disk.

Abstract: An atomic force microscope (AFM) based data storage disk drive uses a cantilever structure that provides independent detection of vertical and lateral motion of the AFM tip as a track with data marks moves past the tip. The vertical detection of the tip deflection toward and away from the disk surface is used for data detection of the data marks that form the tracks. The lateral detection of the tip deflection in a direction generally parallel to the plane of the disk surface is used as the input signal to a tracking servo control system to maintain the tip on a data track. The cantilever structure includes a base connected to the disk drive actuator, a beam made up of a plurality of ribs that have their fixed ends connected to the base, and a probe connected to the free ends of the ribs. The beam ribs have piezoresistors connected to electrical circuitry that detects a resistance change as the ribs are bent laterally.

Abstract: An atomic force microscope (AFM) uses a spin valve magnetoresistive strain gauge formed on the AFM cantilever to detect deflection of the cantilever. The spin valve strain gauge operates in the absence of an applied magnetic field. The spin valve strain gauge is formed on the AFM cantilever as a plurality of films, one of which is a free ferromagnetic layer that has nonzero magnetostriction and whose magnetic moment is free to rotate in the presence of an applied magnetic field. In the presence of an applied stress to the free ferromagnetic layer due to deflection of the cantilever, an angular displacement of the magnetic moment of the free ferromagnetic layer occurs, which results in a change in the electrical resistance of the spin valve strain gauge. Electrical resistance detection circuitry coupled to the spin valve strain gauge is used to determine cantilever deflection.

Abstract: A high density data storage system based on atomic force microscopy uses a tracking servo system based on timing or tracking lines placed on the data storage medium. In a disk drive embodiment with a read-only disk, the timing or tracking lines are formed in sets of triplets with the sets being circumferentially spaced around the disk and interspersed with the surface incongruences that form the machine-readable data features. The data tracks and circumferentially-spaced sets of tracking lines are grouped into radially-spaced bands on the disk. Each set of tracking lines includes at least two lines, one of which is a nonradial line. A separate set of identification (ID) marks associated with each data band are used to initiate a timing gate during which the tracking lines are expected to be detected.

Abstract: An atomic force microscope (AFM) system has a bidirectional actuator to move the AFM tip or stylus in a plane parallel to the surface of the sample to be scanned as well as perpendicularly to the surface of the sample. The actuator is a modified voice coil motor actuator of the type used in compact disc (CD) drives. The stylus is mounted at the end of a support arm that is held in the actuator by a flexure, the flexure permitting movement in the two directions. A set of permanent magnets and two sets of independently controllable electric coils allow the support arm to be moved in the two directions. In a data storage application, a data disk has a series of surface features that represent machine-readable data and the bidirectional actuator is supported by a secondary actuator that moves the primary actuator along a radius of the disk. This allows the bidirectional actuator with the attached stylus to be located to a coarse position within a desired band of data tracks.

Abstract: An atomic force microscope system incorporates a single-crystal silicon cantilever with an integral tip. The cantilever is supported in the AFM system so that it makes an acute angle with the surface of the sample to be scanned. The tip is formed by the convergence of three planes, one of which is one of the two generally parallel planes which define the thickness of the cantilever. The tip lies between the cantilever's two thickness-defining planar surfaces and is thus an in-plane integral tip. The AFM system may have the cantilever surface that converges to the tip oriented to either face the sample or face away from the sample.

Abstract: A high density data storage system includes a rotatable storage medium mounted to rotate about a drive axis, the storage medium having formed thereon a surface topography defining machine readable information. The storage system further includes a high resolution contact sensor having a cantilever arm and a stylus mounted at one end of the cantilever arm. The stylus is positionable to engage the storage medium and follow the surface topography when the storage medium is rotated. A detector system provides an output signal representing cantilever deflection caused by changes in the surface topography of the storage medium.

Abstract: A system for encoding and decoding binary data in a data transmission system, such as a magnetic or optical data storage channel. The encoding process is implemented as a two-step RLL coding procedure wherein the original user bit data are first encoded as an asymmetric RLL code signal at a reduced clock rate and then translated to a second even-spaced RLL code signal suitable for recording to a data storage medium at a full-speed clock rate. The system also provides for recovering suitable even-spaced RLL codes recorded at a full-speed clock rate, translating the recovered even-spaced RLL code signal to an asymmetric RLL code signal at a reduced clock rate, and then decoding the asymmetric RLL code signal to recover the original user bit data. A preferred embodiment uses a rate 2/5 (2, 16, 2) even-spaced RLL code at a full-speed clock rate and a rate 4/5 (0,7; 1,8) asymmetric RLL code at a half-speed clock rate.

Abstract: An optical disk drive has an air-beating slider formed of transparent material and located adjacent the surface of the optical disk. In the manner of conventional magnetic disk drives, the slider is maintained in close relationship with the disk surface by an air-bearing generated by the rotating disk and the shape of the slider's air-bearing surface (ABS). The slider has a lens section located on its back side opposite the side with the ABS. In the preferred embodiment the lens section is at least a hemisphere and the lens section and slider are formed of the same material and thus have the same index of refraction, n. The lens section and slider are transparent to light from the disk drive's light source and together form a super-hemispherical solid immersion lens (SIL). The slider's ABS is maintained within one wavelength of the surface of the optical disk. The light from the disk drive's light source is focused by the super-hemispherical SIL to a point on the slider ABS.