Quantinuum LLC

Various embodiments provide methods, apparatuses, systems, or computer program products for performing quantum object loss detection. The method performed by a controller of a quantum computer includes controlling one or more voltage sources to cause a quantum object confinement apparatus to confine a quantum object crystal, where the quantum object crystal (i) includes at least one of (a) a first species quantum object or (b) a second species quantum object and (ii) defines a crystal axis that is aligned along the RF null axis of the quantum object confinement apparatus; causing at least one first control signal to be provided to at least one control electrode of the plurality of control electrodes, where the at least one first control signal causes the at least one control electrode to generate a push field configured to cause the quantum object crystal axis to rotate with respect to the RF null axis.

Embodiments of the disclosure provide for using pulse width modulation (PWM) to generate signals applied to an electrode of an ion trap while mitigating noise thereof. In some embodiments a PWM signal generator is configured to generate at least one signal, a filter network is configured to filter the at least one signal, and a controller is configured to control operation of the PWM signal generator and the filter network. The controller may cause the PWM signal generator to generate the at least one signal. The at least one signal may be provided to the filter network. The controller may cause the filter network to filter the at least one signal in accordance with a noise requirement, and the filtered at least one signal may be provided to an electrical component of the system.

A controller causes performance of a shelving operation by causing a manipulation source to provide a manipulation signal characterized by a frequency and amplitude. The frequency is detuned from a transition frequency corresponding to a transition between a first quantum state and second quantum state of a quantum object. The detuning is an initial detuning and the amplitude is an initial amplitude. The manipulation signal is incident on the quantum object. The controller controls operation of the manipulation source to cause the detuning of the manipulation signal to evolve from the initial detuning to a zero detuning and the amplitude to increase from the initial amplitude to a maximum amplitude. The controller then controls operation of the manipulation source to cause the detuning of the manipulation signal to evolve from the zero detuning to a final detuning and the amplitude to decrease from the maximum amplitude to a final amplitude.

Provided is a novel beam delivery system comprising an optical beam spatial period converter. The converter comprises a substrate comprising two or more flexures coupled in series; a plurality of first spacing reflective elements and a plurality of second spacing reflective elements disposed on surface of the substrate. Each first spacing reflective element is configured to receive a respective incoming beam of an incoming array of beams and redirect the respective incoming beam to provide an intermediate beam to a respective second spacing reflective element. Each second spacing reflective element is configured to receive a respective intermediate beam and redirect the respective intermediate beam to provide a respective outgoing beam. The respective outgoing beam is one of plurality of outgoing beams that form an outgoing array of beams. The outgoing array of beams and the incoming array of beams have a different spatial frequencies.

Various embodiments provide alignment devices and methods of manufacturing and methods of using alignment devices. In an example embodiment, an alignment device includes a first substrate comprising inputs at respective input positions, outputs at respective output positions, and waveguides configured to provide optical paths from respective inputs to respective outputs. The respective input positions are fabricated in accordance with an input position array determined based on measured positions of optical fiber cores of optical fibers secured to a coupling element array. The coupling element array comprises a plurality of coupling elements having a respective one of the optical fibers secured therein. Each optical fiber is associated with a respective input and the input position array indicates the position of each respective input. The respective output positions are configured to provide respective optical signals to the respective target locations of the receiving device.

An ultra-high vacuum seal assembly includes a circuit board, a first ring, and a second ring. The first ring and the second ring include indium. The circuit board includes a first surface and a second surface that is opposite the first surface. The circuit board also includes a via array that is in electrical communication with the first surface and the second surface of the circuit board. The first ring is positioned directly on the first surface of the circuit board and the second ring is positioned directly on the second surface of the circuit board.

Various embodiments provide ion traps or systems comprising ion traps that comprise a trapping portion and a radio frequency (RF) border electrode bounding the trapping portion. The RF border electrode comprises or is in electrical communication with a plurality of feed ports. In an example embodiment, the ion trap comprises a plurality of unit cells each comprising a respective trapping portion, a respective RF border electrode bounding the respective trapping portion, and a respective feed port of the plurality of feed ports.

A confinement apparatus confines quantum objects and includes a magnetic field control circuit (MFCC) associated with a defined location of the confinement apparatus. Passive dynamical decoupling of magnetic field sensitive sublevels is performed on a quantum object disposed at the defined location by controlling current provided to the MFCC to cause the MFCC to generate an applied magnetic field at the defined location that is aligned with a static quantization field associated with the confinement apparatus and that has an amplitude that is larger than an amplitude of the static quantization field; and controlling the current provided to the MFCC to cause the applied magnetic field to rotate such that an experienced quantization field experienced by the quantum object at the defined location rotates. An angular velocity of the rotation of the experienced quantization field is <2π times a frequency difference between adjacent hyperfine sublevels of the quantum object.

An electrically conductive and optically transparent window comprises a transparent conductive layer (TCL) and a first cladding layer applied to the TCL. A material and a thickness of the first cladding layer are selected to increase the conductivity of the window as compared to an electrically conductive and optically transparent window comprising the TCL without a cladding layer.

A heat exchanger includes a dividing structure configured to define, at least in part, a first volume and a second volume. The dividing structure is configured to permit a flow of a working fluid from the first volume to the second volume and configured to control a ratio of an upstream pressure in the first volume to a downstream pressure in the second volume by inducing an aerodynamic resistance in a flow of the working fluid between the first volume and the second volume. In certain embodiments, the flow of the working fluid between the first volume and the second volume is along a return flow path defined at least in part by the dividing structure, and the return flow path is a tortuous path or a convoluted path.