Abstract: Aspects of the present disclosure describe techniques for using a parabolic Cassegrain-type reflector for ablation. For example, a system for ablation loading of a trap is described that includes a reflector having a hole aligned with a loading aperture of the trap, and an atomic source positioned at a focal point of the reflector, where one or more laser beams are reflected from a reflective front side of the reflector and focused on a surface of the atomic source to produce an atomic plume, and the atomic plume once produced passing through the hole in the reflector and through a loading aperture of the trap for loading the trap. A method for ablation loading of a trap within a chamber in a trapped ion system is also described.

Abstract: A modular quantum computer architecture is developed with a hierarchy of interactions that can scale to very large numbers of qubits. Local entangling quantum gates between qubit memories within a single modular register are accomplished using natural interactions between the qubits, and entanglement between separate modular registers is completed via a probabilistic photonic interface between qubits in different registers, even over large distances. This architecture is suitable for the implementation of complex quantum circuits utilizing the flexible connectivity provided by a reconfigurable photonic interconnect network. The subject architecture is made fault-tolerant which is a prerequisite for scalability.

Abstract: A modular quantum computer architecture is developed with a hierarchy of interactions that can scale to very large numbers of qubits. Local entangling quantum gates between qubit memories within a single modular register are accomplished using natural interactions between the qubits, and entanglement between separate modular registers is completed via a probabilistic photonic interface between qubits in different registers, even over large distances. This architecture is suitable for the implementation of complex quantum circuits utilizing the flexible connectivity provided by a reconfigurable photonic interconnect network. The subject architecture is made fault-tolerant which is a prerequisite for scalability.

Abstract: A computer-implemented method, system and a computer readable medium storing executable instructions for optimizing a quantum circuit are disclosed. The computer-implemented method includes receiving one or more parameters for simulation of evolution of at least one quantum state of a chemical entity to be simulated; generating a quantum circuit for the simulation; performing one or more operations to minimize quantum resources to be used for the generated quantum circuit based on the one or more parameters; and placing quantum resources among one or more elementary logical units (ELUs) based on any one or more of: frequency of occurrence of the quantum resources in the generated quantum circuit, order of occurrence of the quantum resources in the generated quantum circuit, connectivity parameters between one or more quantum resources, efficiency of gates between specific quantum resources, quality of gates between specific quantum resources or a combination thereof.

Abstract: Aspects of the present disclosure describe systems, methods, and structures that enable a compact, UHV ion trap system that can operate at temperatures above cryogenic temperatures. Ion trap systems in accordance with the present disclosure are surface treated and sealed while held in a UHV environment, where disparate components are joined via UHV seals, such as weld joints, compressible metal flanges, and UHV-compatible solder joints. As a result, no cryogenic pump is required, thereby enabling an extremely small-volume system.

Abstract: Systems and methods for loading microfabricated ion traps are disclosed. Photo-ablation via an ablation pulse is used to generate a flow of atoms from a source material, where the flow is predominantly populated with neutral atoms. As the neutral atoms flow toward the ion trap, two-photon photo-ionization is used to selectively ionize a specific isotope contained in the atom flow. The velocity of the liberated atoms, atom-generation rate, and/or heat load of the source material is controlled by controlling the fluence of the ablation pulse to provide high ion-trapping probability while simultaneously mitigating generation of heat in the ion-trapping system that can preclude cryogenic operation. In some embodiments, the source material is held within an ablation oven comprising an electrically conductive housing that is configured to restrict the flow of agglomerated neutral atoms generated during photo-ablation toward the ion trap.

Abstract: The disclosure describes a method, an apparatus, a computer-readable medium, and/or means for reducing two-qubit gates in quantum circuits may include receiving a netlist including information relating to a first plurality of two-qubit quantum gates that form the quantum circuits, performing a controlled gate cancellation operation on the information relating to a first plurality of two-qubit quantum gates to produce a second plurality of two-qubit quantum gates that is functionally equivalent to the first plurality of two-qubit quantum gates, wherein a first number of two-qubit quantum gates in the first plurality of two-qubit quantum gates is larger than a second number of two-qubit quantum gates in the second plurality of two-qubit quantum gates, generating a new netlist containing information about the second plurality of two-qubit quantum gates, and providing the new netlist to implement a functionality of the quantum circuits based on the second plurality of two-qubit quantum gates.

Abstract: Systems and methods for loading microfabricated ion traps are disclosed. Photo-ablation via an ablation pulse is used to generate a flow of atoms from a source material, where the flow is predominantly populated with neutral atoms. As the neutral atoms flow toward the ion trap, two-photon photo-ionization is used to selectively ionize a specific isotope contained in the atom flow. The velocity of the liberated atoms, atom-generation rate, and/or heat load of the source material is controlled by controlling the fluence of the ablation pulse to provide high ion-trapping probability while simultaneously mitigating generation of heat in the ion-trapping system that can preclude cryogenic operation. In some embodiments, the source material is held within an ablation oven comprising an electrically conductive housing that is configured to restrict the flow of agglomerated neutral atoms generated during photo-ablation toward the ion trap.

Abstract: A computer-implemented method, system and a computer readable medium storing executable instructions for optimizing a quantum circuit are disclosed. The computer-implemented method includes receiving one or more parameters for simulation of evolution of at least one quantum state of a chemical entity to be simulated; generating a quantum circuit for the simulation; performing one or more operations to minimize quantum resources to be used for the generated quantum circuit based on the one or more parameters; and placing quantum resources among one or more elementary logical units (ELUs) based on any one or more of: frequency of occurrence of the quantum resources in the generated quantum circuit, order of occurrence of the quantum resources in the generated quantum circuit, connectivity parameters between one or more quantum resources, efficiency of gates between specific quantum resources, quality of gates between specific quantum resources or a combination thereof.

Abstract: A package-level, integrated high-vacuum ion-chip enclosure having improved thermal characteristics is disclosed. Enclosures in accordance with the present invention include first and second chambers that are located on opposite sides of a chip carrier, where the chambers are fluidically coupled via a conduit through the chip carrier. The ion trap is located in the first chamber and disposed on the chip carrier. A source for generating an atomic flux is located in the second chamber. The separation of the source and ion trap in different chambers affords thermal isolation between them, while the conduit between the chambers enables the ion trap to receive the atomic flux.

Abstract: A system for the collection and isolation of photons from multiple photon sources is provided that images individual photon sources onto individual optical fibers. The collected photons can then be directed to one or more photon detectors. The present invention is particularly applicable to a qubit state detection system for the detection of individual qubit states.

Abstract: A computer-implemented method, system and a computer readable medium storing executable instructions for optimizing a quantum circuit are disclosed. The computer-implemented method includes receiving one or more parameters for simulation of evolution of at least one quantum state of a chemical entity to be simulated; generating a quantum circuit for the simulation; performing one or more operations to minimize quantum resources to be used for the generated quantum circuit based on the one or more parameters; and placing quantum resources among one or more elementary logical units (ELUs) based on any one or more of: frequency of occurrence of the quantum resources in the generated quantum circuit, order of occurrence of the quantum resources in the generated quantum circuit, connectivity parameters between one or more quantum resources, efficiency of gates between specific quantum resources, quality of gates between specific quantum resources or a combination thereof.

Abstract: A package-level, integrated high-vacuum ion-chip enclosure having improved thermal characteristics is disclosed. Enclosures in accordance with the present invention include first and second chambers that are located on opposite sides of a chip carrier, where the chambers are fluidically coupled via a conduit through the chip carrier. The ion trap is located in the first chamber and disposed on the chip carrier. A source for generating an atomic flux is located in the second chamber. The separation of the source and ion trap in different chambers affords thermal isolation between them, while the conduit between the chambers enables the ion trap to receive the atomic flux.

Abstract: A multiscale telescopic imaging system is disclosed. The system includes an objective lens, having a wide field of view, which forms an intermediate image of a scene at a substantially spherical image surface. A plurality of microcameras in a microcamera array relay image portions of the intermediate image onto their respective focal-plane arrays, while simultaneously correcting at least one localized aberration in their respective image portions. The microcameras in the microcamera array are arranged such that the fields of view of adjacent microcameras overlap enabling field points of the intermediate image to be relayed by multiple microcameras. The microcamera array and objective lens are arranged such that light from the scene can reach the objective lens while mitigating deleterious effects such as obscuration and vignetting.

Abstract: The disclosure describes various aspects of a practical implementation of multi-qubit gate architecture. A method is described that includes enabling ions in the ion trap having three energy levels, enabling a low-heating rate motional mode (e.g., zig-zag mode) at a ground state of motion with the ions in the ion trap; and performing a Cirac and Zoller (CZ) protocol using the low-heating rate motional mode as a motional state of the CZ protocol and one of the energy levels as an auxiliary state of the CZ protocol, where performing the CZ protocol includes implementing the multi-qubit gate. The method also includes performing one or more algorithms using the multi-qubit gate, including Grover's algorithm, Shor's factoring algorithm, quantum approximation optimization algorithm (QAOA), error correction algorithms, and quantum and Hamiltonian simulations. A corresponding system that supports the implementation of a multi-qubit gate architecture is also described.

Abstract: The disclosure describes a method, an apparatus, a computer-readable medium, and/or means for reducing two-qubit gates in quantum circuits may include receiving a netlist including information relating to a first plurality of two-qubit quantum gates that form the quantum circuits, performing a controlled gate cancellation operation on the information relating to a first plurality of two-qubit quantum gates to produce a second plurality of two-qubit quantum gates that is functionally equivalent to the first plurality of two-qubit quantum gates, wherein a first number of two-qubit quantum gates in the first plurality of two-qubit quantum gates is larger than a second number of two-qubit quantum gates in the second plurality of two-qubit quantum gates, generating a new netlist containing information about the second plurality of two-qubit quantum gates, and providing the new netlist to implement a functionality of the quantum circuits based on the second plurality of two-qubit quantum gates.

Abstract: A computer-implemented method, system and a computer readable medium storing executable instructions for optimizing a quantum circuit are disclosed. The computer-implemented method includes receiving one or more parameters for simulation of evolution of at least one quantum state of a chemical entity to be simulated; generating a quantum circuit for the simulation; performing one or more operations to minimize quantum resources to be used for the generated quantum circuit based on the one or more parameters; and placing quantum resources among one or more elementary logical units (ELUs) based on any one or more of: frequency of occurrence of the quantum resources in the generated quantum circuit, order of occurrence of the quantum resources in the generated quantum circuit, connectivity parameters between one or more quantum resources, efficiency of gates between specific quantum resources, quality of gates between specific quantum resources or a combination thereof.

Abstract: The disclosure describes various aspects of techniques for elliptical beam design using cylindrical optics that may be used in different applications, including in quantum information processing (QIP) systems. In an aspect, the disclosure describes an optical system having a first optical component having a first focal length, a second optical component having a second focal length and aligned with a first direction, and a third optical component having a third focal length and aligned with a second direction orthogonal to the first direction. The optical system is configured to receive one or more optical beams (e.g., circular or elliptical) and apply different magnifications in the first direction and the second direction to the one or more optical beams to image one or more elliptical Gaussian optical beams. A method for generating elliptical optical beams using a system as the one described above is also disclosed.

Abstract: An ion-trap system having a trapping location that is controllable with nanometer-scale precision in three dimensions is disclosed. The ion-trap system includes an ion trap that includes a pair of RF driver electrodes, a pair of tuning electrodes operably coupled with the RF driver electrodes to collectively generate an RF field having an RF null that defines the trapping location, as well as a plurality of DC electrodes that are operably coupled with the RF driver electrodes and the tuning electrodes. Each tuning electrode is driven with an RF signal whose amplitude and phase is independently controllable. By controlling the amplitudes of the RF signals applied to the tuning electrodes, the height of the trapping location above the mirror is controlled. The position of the tuning location along two orthogonal lateral directions is controlled by controlling a plurality of DC voltages applied to the plurality of DC electrode pads.

Abstract: Aspects of the present disclosure describe a compact RF driver circuit for Paul traps in trapped ion quantum computers and methods, and structures including same.