Abstract: Disclosed herein are quantum dot devices, as well as related computing devices and methods. For example, in some embodiments, a quantum dot device may include: a quantum well stack; a first gate above the quantum well stack, wherein the first gate includes a first gate metal and a first gate dielectric; and a second gate above the quantum well stack, wherein the second gate includes a second gate metal and a second gate dielectric, and the first gate is at least partially between a portion of the second gate and the quantum well stack.

Abstract: Quantum dot devices with three of more accumulation gates provided over a single row of a quantum dot formation region are disclosed. Each accumulation gate is electrically coupled to a respective doped region. In this manner, multiple single electron transistors (SETs) are provided along the row. Side and/or center screening gates may be used to apply microwave pulses for qubit control and to control electrostatics so that source and drain regions of the multiple SETs with quantum dots formed along the single row of a quantum dot formation region are sufficiently isolated from one another. Such quantum dot devices provide strong spatial localization of the quantum dots, good control over quantum dot interactions and manipulation, good scalability in the number of quantum dots included in the device, and/or design flexibility in making electrical connections to the quantum dot devices to integrate the quantum dot devices in larger computing devices.

Abstract: A concrete stabilization system which includes a number of subsystems to provide a complete reuse and reclaiming of all concrete which remains unused at the end of the production day, and also reclaims all constituents of washout concrete from a number of concrete mixer trucks following the washing out process. A tower is provided for vertical and tilting motion of a material handling bucket, and a stationary mixer for stabilizing concrete and constituent material for reuse with fresh concrete batches at the start of the next production day or up to four days later. The fully automated system includes a start sequence initiated by the operator of the truck, and the process is then fully automated by a process controller which may be monitored off-site.

Abstract: An orthopedic treatment apparatus has a frame having a first movable platform having a platform frame movably attached to the frame for a reciprocating motion on a first pivot in a generally vertical motion. The first movable platform is also movably attached to said platform frame for a generally horizontal reciprocating motion on a second pivot. A first drive motor is attached to the frame and coupled to the first movable platform for driving the platform in a reciprocating motion relative to the frame while a second drive motor is attached to the first movable platform frame and coupled to the platform for moving the platform in a generally horizontal reciprocating motion relative to the frame.