Multipassage Landau-Zener tunneling oscillations in transverse/longitudinal dual dressing of atomic qubits
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916777699573760 |
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| author | Fregosi, Alessandro Marinelli, Carmela Gabbanini, Carlo Biancalana, Valerio Allegrini, Maria Arimondo, Ennio Petiziol, Francesco Wimberger, Sandro Fioretti, Andrea Bevilacqua, Giuseppe |
| author_facet | Fregosi, Alessandro Marinelli, Carmela Gabbanini, Carlo Biancalana, Valerio Allegrini, Maria Arimondo, Ennio Petiziol, Francesco Wimberger, Sandro Fioretti, Andrea Bevilacqua, Giuseppe |
| contents | We investigate the time evolution of a non-resonant dressed-atom
qubit in an XZ original configuration. It is composed of two
electromagnetic fields, one oscillating parallel and the other
orthogonal to the quantisation magnetic static field. The
experiments are performed in rubidium and caesium atomic
magnetometers, confined in a magneto-optical trap and in a vapour
cell, respectively. Static fields in the $μ$T range and kHz
oscillating fields with large Rabi frequencies are applied. This
dual-dressing configuration is an extension of the Landau-Zener
multipassage interferometry in the presence of an additional
dressing field controlling the tunneling process by its amplitude
and phase. Our measurement of the qubit coherence introduces
additional features to the transition probability readout of
standard interferometry. The coherence time evolution is
characterized by oscillations at several frequencies, each of them
produced by a different quantum contribution. Such frequency
description introduces a new picture of the qubit multipassage
evolution. Because the present low-frequency dressing operation
does not fall within the standard Floquet engineering paradigm based
on the high-frequency expansion, we develop an ad-hoc dressing
perturbation treatment. Numerical simulations support the adiabatic
and non-adiabatic qubit evolution. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03398 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multipassage Landau-Zener tunneling oscillations in transverse/longitudinal dual dressing of atomic qubits Fregosi, Alessandro Marinelli, Carmela Gabbanini, Carlo Biancalana, Valerio Allegrini, Maria Arimondo, Ennio Petiziol, Francesco Wimberger, Sandro Fioretti, Andrea Bevilacqua, Giuseppe Quantum Physics Atomic Physics We investigate the time evolution of a non-resonant dressed-atom qubit in an XZ original configuration. It is composed of two electromagnetic fields, one oscillating parallel and the other orthogonal to the quantisation magnetic static field. The experiments are performed in rubidium and caesium atomic magnetometers, confined in a magneto-optical trap and in a vapour cell, respectively. Static fields in the $μ$T range and kHz oscillating fields with large Rabi frequencies are applied. This dual-dressing configuration is an extension of the Landau-Zener multipassage interferometry in the presence of an additional dressing field controlling the tunneling process by its amplitude and phase. Our measurement of the qubit coherence introduces additional features to the transition probability readout of standard interferometry. The coherence time evolution is characterized by oscillations at several frequencies, each of them produced by a different quantum contribution. Such frequency description introduces a new picture of the qubit multipassage evolution. Because the present low-frequency dressing operation does not fall within the standard Floquet engineering paradigm based on the high-frequency expansion, we develop an ad-hoc dressing perturbation treatment. Numerical simulations support the adiabatic and non-adiabatic qubit evolution. |
| title | Multipassage Landau-Zener tunneling oscillations in transverse/longitudinal dual dressing of atomic qubits |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2506.03398 |