Duke University

Ionq, Inc.

University System of Maryland

Other

Lucent Technologies Inc.

Toyota Motor Engineering & Manufacturing North America, Inc.

The University of British Columbia

Alcatel Lucent

Agere Systems Inc.

The Ohio State University

Alcatel-Lucent USA Inc.

Coldquanta, Inc.

Agere Systems Guartian Corp.

Jungsang Kim

Yunseong Nam

Christopher R Monroe

Kai Hudek

Jonathan Albert Mizrahi

David Brady

Daniel Marks

Omar Shehab

Stewart O Allen

Sungho Jin

David R Smith

Serdar Hakki Yonak

Zhengxiang Ma

Theodore Sizer

David John Bishop

Jason Madjdi Amini

Michael George Zierdt

Kenneth Wright

Charles Santori

Jae Seung Lee

Stanley K Pau

Vladimir Anatolyevich Aksyuk

Yoshihisa Yamamoto

Flavio Pardo

Hareesh Mavoori

Peretz Moshe Feder

Dmitri Maslov

Alex T Tran

Michael Lurie Goldman

Robert A Boie

Neal Pisenti

Peretz Moshes Feder

John VanAtta Gates

Reinhold Blumel

William Robert Holland

Stewart Allen

Robert Spivey

Geert Vrijsen

Peter Maunz

Ismail Inlek

Anatoli Olkhovets

Kenneth Brown

David Moehring

Hui Seong Son

Hyongsok Soh

Vinh N Nguyen

Ainissa G Ramirez

Arnold B Siegel

David Wong-Campos

Robert Raussendorf

Conor Delaney

Yuhi Aikyo

Harold Alexis Huggins

Jeremy Matthew Sage

Daniel J Gauthier

Ming Li

Jaime David Wong-Campos

Hermann Uys

Edward Chan

Gregory P Lafyatis

John V Gates, Ii

Nan Marie Jokerst

Nikodem Grzesiak

Matthew Pelton

Megan Ivory

Alexander Kato

Tom Noel

Steve Hughes

Clinton Cahall

Oliver Benson

Adriaan Jeroen De Lind Van Wijngaarden

Talmage Tyler, Ii

Andre Van Rynbach

Stephen Crain

Nurul T Islam

Kathryn L Nicolich

Ken Brown

The use of multiple ion chains in a single ion trap for quantum information processing (QIP) systems is described. Each chain can have its own set of laser beams with which to implement and operate quantum gates within that chain, where each chain may therefore correspond to a single quantum computing register or core. Operations can be performed in parallel across all of these chains as they can be treated independently from each other. To implement and operate quantum gates between different chains, neighboring chains are merged into a single, larger chain, in which one can perform quantum gates between any of the ions in the larger chain. The combined chains can then be separated again by another shuttling event as needed. To implement and operate quantum gates between ions which do not occupy neighboring chains, swap gates can be used via a sequence of intervening chains.

Quantum computer based on manipulation of ion chains

Aspects of the present disclosure describe techniques that involve an active stabilization of coherent controllers using nearby qubits. In an aspect, a quantum information processing (QIP) system for stabilizing phase damping in qubits is described that provides a first and a second qubit ion, measuring magnetic field fluctuations using the second qubit ion, and generates one or more magnetic fields based on the measured magnetic field fluctuations, the one or more magnetic fields being applied near the first qubit ion to cancel the magnetic field fluctuations to stabilize the phase damping of the first qubit ion. Another such QIP system performs provides a first and a second qubit ion, locks a local oscillator to a frequency reference associated with the second qubit ion, and tracks, using the local oscillator, a frequency of the first qubit ion based on the frequency reference. Methods associated with these QIP systems are also described.

Active stabilization of coherent controllers using nearby qubits

Technologies for an optomechanical system include an intermediate plate having a top surface with multiple tapped holes arranged in a grid. A pair of dowel pin holes surround each tapped hole in a linear pattern. Multiple optical blocks are coupled to the intermediate plate using dowel pins positioned in the dowel pin holes and corresponding dowel pin holes defined in the bottom surface of the optical block. Each optical block includes multiple optical elements coupled to the top surface of the optical block with dowel pins. A cryostat may be coupled to the intermediate plate. A cryo-package assembly is mounted inside a cryo chamber of the cryostat. The cryo-package assembly includes a cryo device such as an ion trap covered by a machined copper lid. The lid includes a meandering passageway to allow for differential pumping in order to achieve ultra-high vacuum within the cryo-package assembly.

High stability optomechanical system and cryo-package assembly for quantum computing

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.

Elliptical beam design using cylindrical optics

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. An optimal quantum control of multimode couplings between qubits is accomplished via individual addressing the qubits with segmented optical pulses to suppress crosstalk in each register, thus enabling high-fidelity gates that can be scaled to larger qubit registers for quantum computation and simulation.

Fault-tolerant scalable modular quantum computer architecture with an enhanced control of multi-mode couplings between trapped ion qubits

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.

Small-volume UHV ion-trap package and method of forming

The disclosure describes various aspects of a software-defined quantum computer. For example, a software-defined quantum computing architecture for allocating qubits is described that includes an application programming interface (API); a quantum operating system (OS) on which the API executes, with the quantum OS including a resource manager and a switch; and a plurality of quantum cores connected by the switch of the quantum resource OS. Moreover, the resource manager of the quantum resource OS determines an allocation of a plurality of qubits in the plurality of quantum cores.

Software-defined quantum computer

The disclosure describes various aspects of a software-defined quantum computer. For example, a method is described for generating an intermediate representation of source code for a software-defined quantum computer. The method includes performing a lexical analysis on a high-level intermediate representation of a quantum programming language; performing semantic analysis on an output of the lexical analysis; and generating a mid-level intermediate representation of the quantum programming language based on an output of the semantic analysis.

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.

Package comprising an ion-trap and method of fabrication

Aspects of the present disclosure describe techniques for independently controlling an angle (e.g., change in tilt) and/or position (e.g., change in lateral position) of an optical beam. For example, an optical beam control system may include a telescope with rotatable mirrors and lenses configured to provide a path to an optical beam to produce an output optical beam, which in turn is made into parallel optical beams following a diffractive optical element. The optical beam control system may also include a detector system to a beam angle and/or a beam position of one of the parallel optical beams to generate feedback signal or signals to control a rotation of one or more of the mirrors in the telescope such as to adjust the beam angle, the beam position, or both of the parallel optical beams. The optical beam control system may be part of a quantum information processing (QIP) system.

Optical beam angle and position control system

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.

Parabolic Cassegrain-type reflector for ablation loading

Growing community of inventors

Chapel Hill, NC, United States of America

Jungsang Kim