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Thursday, June 1, 2023

Physical Review A - May 2023

Physical Review A

covering atomic, molecular, and optical physics and quantum information
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Volume 107, Issue 5

May 2023
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Highlights

Editors' Suggestion
Improving trapped-ion-qubit memories via code-mediated error-channel balancing
Yannick Seis, Benjamin J. Brown, Anders S. Sørensen, and Joseph F. Goodwin
Phys. Rev. A 107, 052417 (2023) – Published 23 May 2023

The authors propose a protocol for improving the performance of a noise-biased trapped-ion qubit memory by rebalancing the noise bias in the logical qubit. The authors demonstrate that the protocol can reduce the net logical error rate by up to two orders of magnitude for realistic parameters.

Editors' Suggestion
Autodetachment spectroscopy of metastable D2 and HD
Raphaël Marion, Martin Čížek, and Xavier Urbain
Phys. Rev. A 107, 052808 (2023) – Published 18 May 2023

The authors measure the autodetachment spectra of D2 and HD using the velocity-map imaging technique by incorporating an electron-neutral coincidence arrangement, which leads to increased energy resolution. The experimental results confirm the main features predicted by theory while resolving the apparent discrepancy between spontaneous dissociation and detachment experiments.

Editors' Suggestion
Multistate interferometric measurement of the nonlinear ac Stark shift
Junnosuke Takai, Kosuke Shibata, Naota Sekiguchi, and Takuya Hirano
Phys. Rev. A 107, 053308 (2023) – Published 11 May 2023

The authors develop an experimental method for measuring the quadratic ac Stark shifts between Zeeman sublevels in an 87Rb Bose–Einstein condensate using a multistate atomic interferometer. The measured quadratic shifts are shown in good agreement with the theoretical calculations. The method could be useful for improving atomic sensors, such as magnetometers and atomic clocks.

Editors' Suggestion
Multichannel hyperspherical model for Efimov physics with van der Waals interactions controlled by a Feshbach resonance
Kajsa-My Tempest and Svante Jonsell
Phys. Rev. A 107, 053319 (2023) – Published 30 May 2023

Because Feshbach resonances can be used to tune atom-atom scattering, they are used as a tool to study Efimov physics in three-body ultracold systems. Here the authors develop and test a model that explicitly includes the multichannel nature of the physics near a Feshbach resonance, and find that the model captures features that are missed by the typical single-channel model.

Editors' Suggestion
Nonradiating orbital motions
Ray Abney and Greg Gbur
Phys. Rev. A 107, 053517 (2023) – Published 19 May 2023

It has been known for over a century that "nonradiating sources," or wave sources that counterintuitively produce no radiative oscillations, are physically possible. Here, the authors extend this to sources in orbital motion and describe how nonradiating sources may be experimentally realized using surface waves in optics.

Featured in Physics Editors' Suggestion Letter
High-fidelity transport of trapped-ion qubits in a multilayer array
Deviprasath Palani, Florian Hasse, Philip Kiefer, Frederick Boeckling, Jan-Philipp Schroeder, Ulrich Warring, and Tobias Schaetz
Phys. Rev. A 107, L050601 (2023) – Published 26 May 2023
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Synopsis:"Shuttled" Ions Stay Quantum

The authors investigate a trapped-ion architecture with thirteen trapping sites for quantum control of multiple particles. They demonstrate automated qubit loading and shuttling within a three-dimensional trapping landscape, achieving a high success rate while preserving coherence.

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