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- W2925882320 abstract "We demonstrate gate operations on a single qubit at a specific site without perturbing the coherence of an adjacent qubit in a 1D optical lattice when the site separation is only 532 nm. Three types of spin rotations are performed on the target qubit with fidelities between $0.88ifmmodepmelsetextpmfi{}0.05$ and $0.99ifmmodepmelsetextpmfi{}0.01$, whereas the superposition state of the adjacent one is preserved with fidelities between $0.93ifmmodepmelsetextpmfi{}0.04$ and $0.97ifmmodepmelsetextpmfi{}0.04$. The qubit is realized by a pair of Zeeman-sensitive ground hyperfine states of a $^{7}mathrm{Li}$ atom, and each site is identified by its resonance frequency in a magnetic field gradient of $1.6text{ }text{ }mathrm{G}/mathrm{cm}$. We achieve the site-specific resolving power in the frequency domain by using magic polarization for the lattice beam that allows a Fourier-limited transition linewidth as well as by highly stabilizing the lattice parameters and the ambient conditions. We also discuss a two-atom entanglement scheme using a blockade by cold collisional shifts in a 1D superlattice, for which a coherent manipulation of individual qubits is a prerequisite." @default.
- W2925882320 created "2019-04-11" @default.
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- W2925882320 date "2019-04-05" @default.
- W2925882320 modified "2023-09-27" @default.
- W2925882320 title "Site-Specific and Coherent Manipulation of Individual Qubits in a 1D Optical Lattice with a 532-nm Site Separation" @default.
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- W2925882320 doi "https://doi.org/10.1103/physrevlett.122.133201" @default.
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