Half-cycle-pulse-train induced state redistribution of Rydberg atoms

Mandal, Pankaj; Speck, A.

doi:10.1103/physreva.81.013401

Cited by 14 publications

(10 citation statements)

References 22 publications

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“…Further quantum state analysis as well as the investigation of mechanisms for efficient de-excitation of Rydberg antihydrogen will be the scope of future research activities. The latter constitutes a significant, widely recognized challenge in the field of antihydrogen research 35 36 37 .…”

Section: Discussionmentioning

confidence: 99%

A source of antihydrogen for in-flight hyperfine spectroscopy

et al. 2014

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Antihydrogen, a positron bound to an antiproton, is the simplest antiatom. Its counterpart—hydrogen—is one of the most precisely investigated and best understood systems in physics research. High-resolution comparisons of both systems provide sensitive tests of CPT symmetry, which is the most fundamental symmetry in the Standard Model of elementary particle physics. Any measured difference would point to CPT violation and thus to new physics. Here we report the development of an antihydrogen source using a cusp trap for in-flight spectroscopy. A total of 80 antihydrogen atoms are unambiguously detected 2.7 m downstream of the production region, where perturbing residual magnetic fields are small. This is a major step towards precision spectroscopy of the ground-state hyperfine splitting of antihydrogen using Rabi-like beam spectroscopy.

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Section: Discussionmentioning

confidence: 99%

A source of antihydrogen for in-flight hyperfine spectroscopy

et al. 2014

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“…Thus, if using a standard oscillator providing for instance 1 W average power, no more than 10 µW total output power is expected [18]. Such sources have been tested to drive transitions between Rydberg atoms, but with only 10% of the population transfer from the n = 50 initial states down to n < 40 [37][38][39]. A simple solution would consist of a blackbody emitter which efficiently radiates in the THz range [40].…”

Section: Broadband Thz Sourcesmentioning

confidence: 99%

Induced THz transitions in Rydberg caesium atoms for application in antihydrogen experiments

et al. 2021

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Antihydrogen atoms are produced at CERN in highly excited Rydberg states. However, precision measurements require anti-atoms in ground state. Whereas experiments currently rely on spontaneous emission only, simulations have shown that THz light can be used to stimulate the decay towards ground state and thus increase the number of anti-atoms available for measurements. We review different possibilities at hand to generate light in the THz range required for the purpose of stimulated deexcitation. We demonstrate the effect of a blackbody type light source, which however presents drawbacks for this application including strong photoionization. Further, we report on the first THz transitions in a beam of Rydberg caesium atoms induced by photomixers and conclude with the implications of the results for the antihydrogen case. Graphic abstract

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“…=2 the pulse acquires a typical half cycle shape; see Ref. [72] for experimental applications of such pulses. For nonzero c, C becomes constant and nonzero when the fields turn off, as is also shown.…”

Section: Appendix A: Carrier Phasementioning

confidence: 99%