Geometric Ramsey Interferometry with a Tripod Scheme
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866909204694958080 |
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| author | Madasu, Chetan Sriram Rathod, Ketan Damji Kwong, Chang Chi Wilkowski, David |
| author_facet | Madasu, Chetan Sriram Rathod, Ketan Damji Kwong, Chang Chi Wilkowski, David |
| contents | Ramsey interferometry is a key technique for precision spectroscopy and to probe the coherence of quantum systems. Typically, an interferometer is constructed using two quantum states and involves a time-dependent interaction with two short resonant electromagnetic pulses. Here, we explore a different type of Ramsey interferometer where we perform quantum state manipulations by geometrical means, eliminating the temporal dependence of the interaction. We use a resonant tripod scheme in ultracold strontium atoms where the interferometric operation is restricted to a two-dimensional dark-state subspace in the dressed-state picture. The observed interferometric phase accumulation is due to an effective geometric scalar term in the dark-state subspace, which remarkably does not vanish during the free evolution time when the light-matter interaction is turned off. This study opens the door for more robust interferometers operating on multiple input-output ports. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_10192 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Geometric Ramsey Interferometry with a Tripod Scheme Madasu, Chetan Sriram Rathod, Ketan Damji Kwong, Chang Chi Wilkowski, David Quantum Physics Atomic Physics Ramsey interferometry is a key technique for precision spectroscopy and to probe the coherence of quantum systems. Typically, an interferometer is constructed using two quantum states and involves a time-dependent interaction with two short resonant electromagnetic pulses. Here, we explore a different type of Ramsey interferometer where we perform quantum state manipulations by geometrical means, eliminating the temporal dependence of the interaction. We use a resonant tripod scheme in ultracold strontium atoms where the interferometric operation is restricted to a two-dimensional dark-state subspace in the dressed-state picture. The observed interferometric phase accumulation is due to an effective geometric scalar term in the dark-state subspace, which remarkably does not vanish during the free evolution time when the light-matter interaction is turned off. This study opens the door for more robust interferometers operating on multiple input-output ports. |
| title | Geometric Ramsey Interferometry with a Tripod Scheme |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2309.10192 |