Demonstration of a neutral atom controlled-NOT quantum gate.

By L. Isenhower, E. Urban, X. L. Zhang, A. Gill, T. Henage, T. Johnson, Thomas G. Walker, Mark Saffman. Physical Review Letters, 2009

681 citations recorded by the source corpus.

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 atoms held in optical traps separated by >8 microm. Using two different gate protocols we measure CNOT fidelities of F=0.73 and 0.72 based on truth table probabilities. The gate was used to generate Bell states with fidelity F=0.48+/-0.06. After correcting for atom loss we obtain an a posteriori entanglement fidelity of F=0.58.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/3e80367959123df57ae5f64a9c15721acdf169b2

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Citations in the corpus

Quantum computing with neutral atoms (2020, methodology): “x in the pair state basis fj0 c0 ti;j0 c1 ti;j1 c0 ti;j1 c1 tigis CNOT = 2 6 6 4 1 0 0 0 0 1 0 0 0 0 0 1 0 0 1 0 3 7 7 5: There are several ways to realize this gate using dipolar Rydberg interaction [16,18]. Figure B1.1(a) illustrates the key mechanism with a simple sequence of 3 pulses. With initi”
Do We Really Understand Quantum Mechanics? (2012, methodology): “Various experimental methods have also been developed to create entanglement in neutral atoms [341, 342], in particular a recent method called “carving entangled states”, which consists in starting from a product state for two atoms, and removing components from this state in order to make it strong”
Modular entanglement of atomic qubits using photons and phonons (2014, background): “native local interactions in many physical platforms, such as trapped atomic ions through their Coulomb interaction [5], Rydberg atoms through their electric dipoles [7, 8], nitrogen-vacancy centers in diamond through their magnetic dipoles [9], and superconducting Joseph-”
Quantum simulation and computing with Rydberg-interacting qubits (2020, methodology): “Single and two qubit operations with negligible inﬂu-ence on neighboring qubits (low crosstalk) have been experimentally demonstrated using focused Rydberg excitation lasers or Raman coupling lasers 125,126,144 (one example from Graham et al. 125 is shown in Fig.”
Dipole blockade in a cold Rydberg atomic sample [Invited] (2010, background): “Finally the first demonstration of a CNOT gate, with fidelity of 0.73, using neutral atoms have been achieved in Wisconsin [21].”
An atom-by-atom assembler of defect-free arbitrary two-dimensional atomic arrays (2016, neutral): “Although proof-of-principle demonstrations of quantum gates [13] and quantum simulations [14] using this latter platform have been reported [15],”
Natural and artificial atoms for quantum computation (2010, background): “Very recently, a CNOT gate [33], post-selective entanglement of two atoms [37] using Rydberg blockade interactions and on-demand entanglement [38] have been demonstrated.”
Experimental investigations of dipole–dipole interactions between a few Rydberg atoms (2016, background): “Reprinted figures with permission from [90].”
Quantum computing with atomic qubits and Rydberg interactions: progress and challenges (2016, neutral): “58 2009 [33] (87)Rb Blockade, separate addressing 0.”
An elementary quantum network of single atoms in optical cavities (2012, background): “[18] Isenhower, L.”