Abstract
Quantum processing architectures that include multiple qubit modalities offer compelling strategies for high-fidelity operations and readout, quantum error correction, and a path for scaling to large system sizes. Such hybrid architectures have been realized for leading platforms, including superconducting circuits and trapped ions. Recently, a new approach for constructing large, coherent quantum processors has emerged based on arrays of individually trapped neutral atoms. However, these demonstrations have been limited to arrays of a single atomic element where the identical nature of the atoms makes crosstalk-free control and nondemolition readout of a large number of atomic qubits challenging. Here we introduce a dual-element atom array with individual control of single rubidium and cesium atoms. We demonstrate their independent placement in arrays with up to 512 trapping sites and observe negligible crosstalk between the two elements. Furthermore, by continuously reloading one atomic element while maintaining an array of the other, we demonstrate a new continuous operation mode for atom arrays without any off-time. Our results enable avenues for auxiliary-qubit-assisted quantum protocols such as quantum nondemolition measurements and quantum error correction, as well as continuously operating quantum processors and sensors.1 MoreReceived 29 October 2021Accepted 4 February 2022DOI:https://doi.org/10.1103/PhysRevX.12.011040Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasHybrid quantum systemsQuantum information architectures & platformsTechniquesAtom & ion coolingCooling & trappingOptical tweezersQuantum InformationAtomic, Molecular & Optical
Highlights
Realizing large-scale programmable quantum devices with the capability to simulate the behavior of complex processes in physics and chemistry, and to process large amounts of quantum information with high fidelity is at the forefront of science [1–4]
The electron spin of a single nitrogen-vacancy center can be coupled to neighboring nuclear spin qubits (14N nuclear spin or 13C nuclear spins) which act as quantum memories [10]
We use a dual-wavelength optical tweezer array to load and trap individual atoms from a laser-cooled cloud of Rb and Cs atoms. This optical tweezer array is formed by combining a 2D array of tweezers at 910 nm generated from a spatial light modulator (SLM) and a separate 2D array of tweezers at 811 nm generated from an acoustooptic deflector (AOD)
Summary
Realizing large-scale programmable quantum devices with the capability to simulate the behavior of complex processes in physics and chemistry, and to process large amounts of quantum information with high fidelity is at the forefront of science [1–4]. Neutral atom arrays have emerged as a promising quantum architecture for pushing the current limits on system sizes [14,15], coherence [16], and high-fidelity state preparation and control [17–21]. In these systems, individual neutral atoms are trapped in arrays of optical tweezers and coherent interactions between atoms are. Atomic element into the tweezers while maintaining an array of the other element with no additional losses This enables the continuous operation of an atomic array without any measurement downtime due to atom loading and initialization, a feature that is inaccessible in single-species atom arrays. Our results open these exciting avenues and enable the continuous operation of atom-array-based quantum processors and sensors
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
