Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Embodiments of the present disclosure provide for efficient global qubit placement within a quantum computing environment for a quantum program. Some embodiments utilize a graph-based approach to represent positions in a quantum computing environment, and optimize the graph layout using a graph processing algorithm to rearrange layers of a graph and reduce edge crossings. A layered graph associated with minimum cost is selected and utilized as an efficient layered graph for purposes of global qubit placement at various time steps of execution. Embodiments provide satisfactory approximations that avoid the NP-hard nature of this task to significantly reduce compilation time to a solution for global qubit placement as opposed to optimal global qubit placement while additionally identifying solutions that significantly reduce overall execution time and computing resource usage.

Abstract: A quantum system controller configured to perform conditional transport with just-in-time waveform selection is provided. The quantum system controller comprises a processing device configured to generate a set of processed waveform files configured to cause a quantum processor of the quantum computer to perform a quantum circuit; cause the processed waveform files to be preloaded to one or more arbitrary waveform generators; and causing at least one signal to be provided to the one or more arbitrary waveform generators to execute at least one of the preloaded processed waveform files, wherein the signals provided to arbitrary waveform generators to execute at least one of the preloaded waveform files is in response to the quantum system controller evaluating a conditional operation. The signals provided to the arbitrary waveform generators allow for the just-in-time selection a waveform selection not on an expected path of the quantum circuit.

Abstract: Embodiments of the present disclosure provide for qubit reuse within a quantum computing environment for a quantum program in a quantum computing environment. In this regard, embodiments generate an optimized quantum program based on an initial quantum program. In some embodiments, the optimized quantum program may utilize fewer computing resources, such as qubits, than the initial quantum program. In some embodiments, the optimized quantum program may be compiled and executed in the quantum computing environment.

Abstract: A controller of a QCCD-based quantum computer is configured to perform arbitrary angle two-qubit gates using global single-qubit gates and rotations of arbitrary angles and/or individual single-qubit gates that include two-qubit gate primitives, such as a phase-independent anti-symmetric two-qubit gate, and that are not individually addressed.

Abstract: A quantum computing system comprises a classical computing entity, a controller, and a quantum processor. The controller is configured to control operation of the quantum processor and communicate with the computing entity. The controller causes performance of syndrome circuit segments to generate syndromes of logical qubits. The syndrome circuit segment is performed at least partially by causing performance of a sequence of transportation operations and at-least-two-physical-qubits interactions. Each transportation operation of the sequence causes physical transport of at least one of a respective data qubit of the logical qubit or a respective ancilla qubit into a respective interaction zone defined by the quantum processor. A respective at-least-two-physical-qubits interaction is performed within the respective interaction zone.

Abstract: Various embodiments provide methods, apparatuses, systems, or computer program products for performing decreased crosstalk atomic object reading/detection. A controller is operatively connected to components of a system comprising a confinement apparatus comprising RF electrodes defining an RF null axis and a plurality of longitudinal electrodes. The components comprise voltage sources and manipulation sources. The controller is configured to cause an atomic object being read and neighboring atomic object(s) to be confined by the confinement apparatus; and cause the voltage sources to provide first control signals to longitudinal electrodes. The first control signals cause the longitudinal electrodes to generate a push field configured to cause one of the atomic object being read or the neighboring atomic object(s) to move off the RF null axis.

Abstract: One or more real time engines of a quantum computer provide quantum measurement information to a classical computing engine via a classical function call. The quantum computer includes a controller comprising the one or more real time engines in communication with the classical computing engine, and a quantum processor. The controller is configured to control operation of one or more components of the quantum processor. The real time engines receive a classical call response comprising an indication of a result determined via execution of a classical function by the classical computing engine based at least in part on the classical function call; and control operation of the one or more components of the quantum processor based at least in part on the result.

Abstract: A beam delivery system is provided that includes a beam delivery photonic integrated circuit. The beam delivery photonic integrated circuit includes one or more optical inputs; a plurality of waveguide outputs; and a plurality of beam paths. Each beam path connects one of the plurality of waveguide outputs to at least one of the optical inputs. The plurality of waveguide outputs are configured to emit a plurality of parallel beams. The beam delivery photonic integrated circuit is on a chip. The beam delivery system further includes a telecentric optical relay assembly. The telecentric optical relay assembly is configured to receive the plurality of parallel beams provided by the waveguide outputs and focus each received beam on a corresponding one of a plurality of positions of an atomic object confinement apparatus in a telecentric manner.

Abstract: An atomic object confined in a particular region of an atomic object confinement apparatus is cooled using an S-to-P-to-D EIT cooling operation. A controller associated with the atomic object confinement apparatus controls first and second manipulation sources to respectively provide first and second manipulation signals to the particular region. The first manipulation signal is characterized by a first wavelength corresponding to a transition between an S manifold and a P manifold of a first component of the atomic object and detuned from the S-to-P transition by a first detuning. The second manipulation signal is characterized by a second wavelength corresponding to a transition between the P manifold and a D manifold of the first component and detuned from the P-to-D transition by a second detuning. The first and second detunings selected to establish a dark state associated with a two-photon transition between the S manifold and the D manifold.

Abstract: Embodiments relate to initializing and/or performing state preparation for an atomic object. The controller controls first manipulation sources to provide first manipulation signals and second manipulation sources to provide second manipulation signals. The first and second manipulation signals are incident on the atomic object. The atomic object has a nuclear spin greater than one half. A ground state manifold of the atomic object comprises one or more selected ground manifold states and non-selected ground manifold states. The first manipulation signals are configured to drive transitions from the non-selected ground manifold states to one or more pumped manifolds of the atomic object and suppress transitions out of the selected ground manifold states. The second manipulation signals are configured to stimulate the atomic object to decay a pumped manifold into a decayed state, wherein there is a non-zero probability that the decayed state is one of the selected ground manifold states.

Abstract: Atomic object confinement apparatuses comprising periodic or quasi-periodic arrays of legs, including curved legs, and systems comprising such atomic object confinement apparatuses are provided. The atomic object confinement apparatus comprises a plurality of legs with each leg of the plurality of legs defining a one-dimensional trap segment; and a plurality of junctions with each junction of the plurality of junctions connecting at least two legs of the plurality of legs. The plurality of legs and the plurality of junctions are arranged into a periodic or quasi-periodic array of connected one-dimensional trap segments. The periodic array or quasi-periodic array comprises one or more smallest array elements. Each smallest array element of the one or more smallest array elements comprises at least one curved leg.

Abstract: Atomic object confinement apparatuses comprising periodic or quasi-periodic arrays of legs, including curved legs, and systems comprising such atomic object confinement apparatuses are provided. The atomic object confinement apparatus comprises a plurality of legs with each leg of the plurality of legs defining a one-dimensional trap segment; and a plurality of junctions with each junction of the plurality of junctions connecting at least two legs of the plurality of legs. The plurality of legs and the plurality of junctions are arranged into a periodic or quasi-periodic array of connected one-dimensional trap segments. The periodic array or quasi-periodic array comprises one or more smallest array elements. Each smallest array element of the one or more smallest array elements comprises at least one curved leg.

Abstract: An atomic object confined in a particular region of an atomic object confinement apparatus is cooled using an S-to-P-to-D EIT cooling operation. A controller associated with the atomic object confinement apparatus controls first and second manipulation sources to respectively provide first and second manipulation signals to the particular region. The first manipulation signal is characterized by a first wavelength corresponding to a transition between an S manifold and a P manifold of a first component of the atomic object and detuned from the S-to-P transition by a first detuning. The second manipulation signal is characterized by a second wavelength corresponding to a transition between the P manifold and a D manifold of the first component and detuned from the P-to-D transition by a second detuning. The first and second detunings selected to establish a dark state associated with a two-photon transition between the S manifold and the D manifold.

Abstract: A multi-atomic object crystal is transported from a first leg to a second leg of an atomic object confinement apparatus through a corresponding junction. Voltage sources in electrical communication with electrodes of the apparatus are controlled to confine the crystal in the first leg. The voltage sources are controlled to cause transport of the crystal along the first leg to proximate the junction and then to cause generation of a time-dependent potential at the junction that is configured to cause the crystal to traverse a transport path through the junction from the first leg to the second leg via a dynamic potential well defining a particular variable axial frequency. The transport path is determined by combining a path of constant total confinement for a representative atomic object of the crystal and a path of radio frequency minimum for the representative atomic object, using a particular variable path ratio.

Abstract: A quantum system controller configured to perform (near) real-time quantum error correction is provided. The controller comprises a processing device comprising at least one first processing element; a time-indexed command (TIC) sequencer comprising at least one second processing element; and a plurality of driver controller elements configured to control the operation of respective components and associated with respective buffers and processing elements. The processing device is configured to generate commands and the TIC sequencer is configured to cause the time-indexed execution of the commands by the appropriate driver controller elements.