We study an architecture for implementing adiabatic quantum computation with trapped neutral atoms. Ground-state atoms are dressed by laser fields in a manner conditional on the Rydberg blockade mechanism, thereby providing the requisite entangling interactions. As a benchmark, we study the performance of quantum annealing to the ground state of an Ising spin lattice. We model a proof-of-principle experiment in a realistic architecture, including details of the atomic implementation, with qubits encoded in the clock states of ${}^{133}$ Cs. Numerical simulation yields fidelities >0.98 for up to four qubits, and implementations of 10--20 qubits are within the range of current technology.We study an architecture for implementing adiabatic quantum computation with trapped neutral atoms. Ground-state atoms are dressed by laser fields in a manner conditional on the Rydberg blockade mechanism, thereby providing the requisite entangling interactions. As a benchmark, we study the performance of quantum annealing to the ground state of an Ising spin lattice. We model a proof-of-principle experiment in a realistic architecture, including details of the atomic implementation, with qubits encoded in the clock states of ${}^{133}$Cs. Numerical simulation yields fidelities >0.98 for up to four qubits, and implementations of 10--20 qubits are within the range of current technology.

arXiv:1209.4112Physical Review AMay 17, 201373 citations

High-fidelity Rydberg-blockade entangling gate using shaped, analytic pulses

Lukas Theis, Felix Motzoi, Frank K. Wilhelm +1 more

We show that the use of shaped pulses improves the fidelity of a Rydberg-blockade two-qubit entangling gate by several orders of magnitude compared to previous protocols based on square pulses or optimal control pulses. Using analytical derivative removal by adiabatic gate (DRAG) pulses that reduce excitation of primary leakage states and an analytical method of finding the optimal Rydberg blockade, we generate Bell states with a fidelity of $F>0.9999$ in a 300 K environment for a gate time of only $50\phantom{\rule{0.28em}{0ex}}\mathrm{ns}$ , which is an order of magnitude faster than previous protocols. These results establish the potential of neutral atom qubits with Rydberg-blockade gates for scalable quantum computation.We show that the use of shaped pulses improves the fidelity of a Rydberg-blockade two-qubit entangling gate by several orders of magnitude compared to previous protocols based on square pulses or optimal control pulses. Using analytical derivative removal by adiabatic gate (DRAG) pulses that reduce excitation of primary leakage states and an analytical method of finding the optimal Rydberg blockade, we generate Bell states with a fidelity of $F>0.9999$ in a 300 K environment for a gate time of only $50\phantom{\rule{0.28em}{0ex}}\mathrm{ns}$, which is an order of magnitude faster than previous protocols. These results establish the potential of neutral atom qubits with Rydberg-blockade gates for scalable quantum computation.

arXiv:1605.08891Physical Review ASep 6, 2016105 citations

A boost to Rydberg quantum computing

Wenhui Li

Nature PhysicsMay 25, 20206 citations

Nonadiabatic holonomic quantum computation using Rydberg blockade

Yi‐Hao Kang, Ye‐Hong Chen, Zhi‐Cheng Shi +3 more

In this paper, we propose a scheme for realizing nonadiabatic holonomic computation assisted by two atoms and the shortcuts to adiabaticity (STA). The blockade effect induced by strong Rydberg-mediated interaction between two Rydberg atoms provides us the possibility to simplify the dynamics of the system, and the STA helps us design pulses for implementing the holonomic computation with high fidelity. Numerical simulations show the scheme is noise immune and decoherence resistant. Therefore, the current scheme may provide some useful perspectives for realizing nonadiabatic holonomic computation.In this paper, we propose a scheme for realizing nonadiabatic holonomic computation assisted by two atoms and the shortcuts to adiabaticity (STA). The blockade effect induced by strong Rydberg-mediated interaction between two Rydberg atoms provides us the possibility to simplify the dynamics of the system, and the STA helps us design pulses for implementing the holonomic computation with high fidelity. Numerical simulations show the scheme is noise immune and decoherence resistant. Therefore, the current scheme may provide some useful perspectives for realizing nonadiabatic holonomic computation.

Physical Review AApr 23, 201877 citations

{}^{133}

Cs. Numerical simulation yields fidelities >0.98 for up to four qubits, and implementations of 10--20 qubits are within the range of current technology.

F>0.9999

in a 300 K environment for a gate time of only

50\phantom{\rule{0.28em}{0ex}}\mathrm{ns}

, which is an order of magnitude faster than previous protocols. These results establish the potential of neutral atom qubits with Rydberg-blockade gates for scalable quantum computation.