6/28/2023 0 Comments Neutral atom![]() Magic wavelength optical traps for Rydberg atoms. Symmetric Rydberg controlled-Z gates with adiabatic pulses. ![]() Photon-recoil and laser-focusing limits to Rydberg gate fidelity. Parallel implementation of high-fidelity multiqubit gates with neutral atoms. Analysis of dephasing mechanisms in a standing-wave dipole trap. ![]() Comparison of Gaussian and super Gaussian laser beams for addressing atomic qubits. Gillen-Christandl, K., Gillen, G., Piotrowicz, M. Λ-enhanced gray-molasses cooling of cesium atoms on the D 2 line. A quantum processor based on coherent transport of entangled atom arrays. Hybrid quantum-classical algorithms and quantum error mitigation. Quantum phase estimation of multiple eigenvalues for small-scale (noisy) experiments. Quantum algorithm for linear systems of equations. 35th Annual Symposium on Foundations of Computer Science 124–134 (IEEE, 1994). Algorithms for quantum computation: discrete logarithms and factoring. A variational eigenvalue solver on a photonic quantum processor. Quantum computing in the NISQ era and beyond. New Born–Oppenheimer potential energy curve and vibrational energies for the electronic ground state of the hydrogen molecule. Tapering off qubits to simulate fermionic Hamiltonians. Quantum algorithm providing exponential speed increase for finding eigenvalues and eigenvectors. 14-qubit entanglement: creation and coherence. Doubly magic optical trapping for Cs atom hyperfine clock transitions. Analysis of a quantum logic device based on dipole-dipole interactions of optically trapped Rydberg atoms. Quantum-enhanced measurements: beating the standard quantum limit. Spin squeezing and reduced quantum noise in spectroscopy. Generation and manipulation of Schrödinger cat states in Rydberg atom arrays. Compact ion-trap quantum computing demonstrator. Generation of multicomponent atomic Schrödinger cat states of up to 20 qubits. Bell inequality, Bell states and maximally entangled states for n qubits. In situ single-atom array synthesis using dynamic holographic optical tweezers. Atom-by-atom assembly of defect-free one-dimensional cold atom arrays. An atom-by-atom assembler of defect-free arbitrary two-dimensional atomic arrays. Rydberg mediated entanglement in a two-dimensional neutral atom qubit array. Single-qubit gates based on targeted phase shifts in a 3D neutral atom array. ![]() Randomized benchmarking of single-qubit gates in a 2D array of neutral-atom qubits. Quantum phases of matter on a 256-atom programmable quantum simulator. Quantum simulation of 2D antiferromagnets with hundreds of Rydberg atoms. Calculating unknown eigenvalues with a quantum algorithm. A programmable two-qubit quantum processor in silicon. Quantum approximate optimization of non-planar graph problems on a planar superconducting processor. Demonstration of two-qubit algorithms with a superconducting quantum processor. Complete 3-qubit Grover search on a programmable quantum computer. Real-time dynamics of lattice gauge theories with a few-qubit quantum computer. A quantum approximate optimization algorithm. Simulated quantum computation of molecular energies. in Bell’s Theorem, Quantum Theory and Conceptions of the Universe (ed. Observation of Rydberg blockade between two atoms. Observation of collective excitation of two individual atoms in the Rydberg blockade regime. These results highlight the emergent capability of neutral-atom qubit arrays for universal, programmable quantum computation, as well as preparation of non-classical states of use for quantum-enhanced sensing. Preparation of entangled Greenberger–Horne–Zeilinger (GHZ) states 5 with up to six qubits, quantum phase estimation for a chemistry problem 6 and the quantum approximate optimization algorithm (QAOA) 7 for the maximum cut (MaxCut) graph problem are demonstrated. Here we demonstrate several quantum algorithms on a programmable gate-model neutral-atom quantum computer in an architecture based on individual addressing of single atoms with tightly focused optical beams scanned across a two-dimensional array of qubits. Combined with the strong entangling interactions provided by Rydberg states 2, 3, 4, all the necessary characteristics for quantum computation are available. Neutral-atom hyperfine qubits provide inherent scalability owing to their identical characteristics, long coherence times and ability to be trapped in dense, multidimensional arrays 1. Gate-model quantum computers promise to solve currently intractable computational problems if they can be operated at scale with long coherence times and high-fidelity logic.
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