Quantum computing with atomic qubits and Rydberg interactions: progress and challenges

M Saffman - Journal of Physics B: Atomic, Molecular and Optical …, 2016 - iopscience.iop.org
We present a review of quantum computation with neutral atom qubits. After an overview of
architectural options and approaches to preparing large qubit arrays we examine Rydberg …

Quantum information with Rydberg atoms

M Saffman, TG Walker, K Mølmer - Reviews of modern physics, 2010 - APS
Rydberg atoms with principal quantum number n⪢ 1 have exaggerated atomic properties
including dipole-dipole interactions that scale as n 4 and radiative lifetimes that scale as n 3 …

Multi-qubit entanglement and algorithms on a neutral-atom quantum computer

TM Graham, Y Song, J Scott, C Poole, L Phuttitarn… - Nature, 2022 - nature.com
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 …

Midcircuit measurements on a single-species neutral alkali atom quantum processor

TM Graham, L Phuttitarn, R Chinnarasu, Y Song… - Physical Review X, 2023 - APS
We demonstrate midcircuit measurements in a neutral atom array by shelving data qubits in
protected hyperfine-Zeeman substates while nondestructively measuring an ancilla qubit …

Rydberg-mediated entanglement in a two-dimensional neutral atom qubit array

TM Graham, M Kwon, B Grinkemeyer, Z Marra, X Jiang… - Physical review …, 2019 - APS
We demonstrate high fidelity two-qubit Rydberg blockade and entanglement on a pair of
sites in a large two-dimensional qubit array. The qubit array is defined by a grid of blue …

Experimental investigations of dipole–dipole interactions between a few Rydberg atoms

A Browaeys, D Barredo, T Lahaye - Journal of Physics B: Atomic …, 2016 - iopscience.iop.org
This review summarizes experimental works performed over the last decade by several
groups on the manipulation of a few individual interacting Rydberg atoms. These studies …

Demonstration of a Neutral Atom Controlled-NOT Quantum Gate

L Isenhower, E Urban, XL Zhang, AT Gill, T Henage… - Physical review …, 2010 - APS
We present the first demonstration of a cnot gate between two individually addressed neutral
atoms. Our implementation of the cnot uses Rydberg blockade interactions between neutral …

Observation of Rydberg blockade between two atoms

E Urban, TA Johnson, T Henage, L Isenhower… - Nature Physics, 2009 - nature.com
Blockade interactions whereby a single particle prevents the flow or excitation of other
particles provide a mechanism for control of quantum states, including entanglement of two …

Rydberg-blockade controlled-not gate and entanglement in a two-dimensional array of neutral-atom qubits

KM Maller, MT Lichtman, T Xia, Y Sun, MJ Piotrowicz… - Physical Review A, 2015 - APS
We present experimental results on two-qubit Rydberg-blockade quantum gates and
entanglement in a two-dimensional qubit array. Without postselection against atom loss we …

Observation of collective excitation of two individual atoms in the Rydberg blockade regime

A Gaëtan, Y Miroshnychenko, T Wilk, A Chotia… - Nature Physics, 2009 - nature.com
When two quantum systems interact strongly with each other, their simultaneous excitation
by the same driving pulse may be forbidden. The phenomenon is known as blockade of …