Two-dimensional transport and transfer of a single atomic qubit in optical tweezers

By J. Beugnon, C. Tuchendler, H. Marion, A. Gaëtan, Y. Miroshnychenko, Y. Sortais, A. Lance, Matthew P. A. Jones, G. Messin, Antoine Browaeys and 1 more. 2007

178 citations recorded by the source corpus.

Quantum computers have the capability of out-performing their classical counterparts for certain computational problems. Several scalable quantum-computing architectures have been proposed. An attractive architecture is a large set of physically independent qubits arranged in three spatial regions where (1) the initialized qubits are stored in a register, (2) two qubits are brought together to realize a gate and (3) the readout of the qubits is carried out. For a neutral-atom-based architecture, a natural way to connect these regions is to use optical tweezers to move qubits within the system. In this letter we demonstrate the coherent transport of a qubit, encoded on an atom trapped in a submicrometre tweezer, over a distance typical of the separation between atoms in an array of optical traps. Furthermore, we transfer a qubit between two tweezers, and show that this manipulation also preserves the coherence of the qubit.

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

View Paper: https://www.semanticscholar.org/paper/78c80ec1e26062e32a289a857bc4acfee8dc13e5

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Citations in the corpus

Single-Atom Trapping in Holographic 2D Arrays of Microtraps with Arbitrary Geometries (2014, background): “Rydberg blockade [38], especially in combination with dynamical addressability using moving optical tweezers [39].”
A quantum processor based on coherent transport of entangled atom arrays (2021, unknown): “The resulting parity oscillations indicate that two-atom entanglement is unaffected by the transport process [20, 29].”
Cooling a Single Atom in an Optical Tweezer to Its Quantum Ground State (2012, methodology): “To calculate the feasibility of the number of cooling cycles required in the experiment, we determine theoretically the number of optical pumping and repumping photons scattered in the ideal situation of pure, resonant σ F = 2− 2′ light and repumping F = 1− 2′ light [2].”
Observation of collective excitation of two individual atoms in the Rydberg blockade regime (2008, background): “The resulting entangled state is therefore , which involves long-lived atomic qubit”
An atom-by-atom assembler of defect-free arbitrary two-dimensional atomic arrays (2016, background): “[20] for a few atoms, and revisited recently in [21, 22], consists in sorting disordered arrays of atoms using moving optical potentials [23].”
Logical quantum processor based on reconfigurable atom arrays (2023, methodology): “Transferring atoms between tweezers 9 presents further challenges.”
Quantum information with Rydberg atoms (2009, background): “There is also the possibility of using a movable optical tweezer to systematically transfer atoms between sites as needed(Beugnon et al., 2007), or from a reservoir into lattice sites.”
Preparation of a single atom in an optical microtrap (2010, background): “The second approach, which may be applied in arbitrary geometrie”