Phase Control of Trapped Ion Quantum Gates

By Patricia Lee. 2005

178 citations recorded by the source corpus.

There are several known schemes for entangling trapped ion quantum bits for large-scale quantum computation. Most are based on an interaction between the ions and external optical fields, coupling internal qubit states of trapped ions to their Coulomb-coupled motion. In this paper, we examine the sensitivity of these motional gate schemes to phase fluctuations introduced through noisy external control fields, and suggest techniques for suppressing the resulting phase decoherence.

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

View Paper: https://www.semanticscholar.org/paper/cbf5428a713e8dc21cf92da1c92733c4d5117954

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Quantum computing with trapped ions (2008, unknown): “Lee et al. (2005); Brickman et al. (2005); Brickman (2007)).”
Modular entanglement of atomic qubits using photons and phonons (2014, background): “Tracking and controlling the optical phases between many entangled pairs in spatially separated modules at different times can be accomplished by utilizing “phase insensitive” gates [24].”
Experimental test of the quantum Jarzynski equality with a trapped-ion system (2014, background): “1(a) and (b), which is equivalent to generating the so-called qubitstate dependent force [30, 31].”
Quantum metrology with nonclassical states of atomic ensembles (2016, methodology): “B. Spin-dependent optical dipole forces generated by a pair of off-resonance laser beams with different frequencies, addressing many normal modes simultaneously, have been recently used to engineer tunable Ising spin-spin coupling (Kim et al., 2009; Lee et al., 2005; Porras and Cirac, 2006).”
Demonstration of the trapped-ion quantum CCD computer architecture (2020, methodology): “TQ gates: We operate a Mølmer-Sørensen interaction [28] in the phase-sensitive configuration [29, 30] and add SQ wrapper pulses driven with the same lasers (Fig.”
A Race-Track Trapped-Ion Quantum Processor (2023, methodology): “2Q gates are implemented with a phase-sensitive Mølmer-Sørensen (MS) gate [32, 33] sandwiched between 1Q wrapper pulses (using the same laser beams as the MS interaction) to generate the parameterized gate UZZ(θ) = exp (−iθZZ/2) [33–36].”