Dissipative preparation of W states in trapped ion systems

We present protocols for dissipative entanglement of three trapped-ion qubits and discuss a scheme that uses sympathetic cooling as the dissipation mechanism. This scheme relies on tailored destructive interference to generate any one of six entangled W states in a three-ion qubit space. Using a ber...

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Bibliographic Details
Published inNew journal of physics Vol. 23; no. 7; pp. 73001 - 73016
Main Authors Cole, Daniel C, Wu, Jenny J, Erickson, Stephen D, Hou, Pan-Yu, Wilson, Andrew C, Leibfried, Dietrich, Reiter, Florentin
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.07.2021
Subjects
Beryllium
Cooling
Crystal defects
dissipative control
Entangled states
entanglement
Hierarchies
Hilbert space
Information processing
Magnesium
open quantum systems
Photon scatter
Physics
Quantum entanglement
quantum reservoir engineering
trapped ions
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Summary:We present protocols for dissipative entanglement of three trapped-ion qubits and discuss a scheme that uses sympathetic cooling as the dissipation mechanism. This scheme relies on tailored destructive interference to generate any one of six entangled W states in a three-ion qubit space. Using a beryllium–magnesium ion crystal as an example system, we theoretically investigate the protocol’s performance and the effects of likely error sources, including thermal secular motion of the ion crystal, calibration imperfections, and spontaneous photon scattering. We estimate that a fidelity of ∼98% may be achieved in typical trapped ion experiments with ∼1 ms interaction time. These protocols avoid timescale hierarchies for faster preparation of entangled states.
Bibliography:NJP-113246.R1
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ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/ac09c8