Resonant quantum transitions in trapped antihydrogen atoms

@article{Amole2012ResonantQT,
  title={Resonant quantum transitions in trapped antihydrogen atoms},
  author={C. Amole and Mohammad D. Ashkezari and M. Baquero-Ruiz and W. A. Bertsche and Paul D. Bowe and E Butler and Andrea Capra and C. L. Cesar and M Charlton and A. Deller and Patrick H Donnan and Stefan Eriksson and Joel Fajans and Timothy P. Friesen and M C Fujiwara and David Russell Gill and Andrea Gutierrez and Jeffrey S. Hangst and W. N. Hardy and Michael Edward Hayden and Andrew J. Humphries and C A Isaac and Svante Jonsell and Lenoid Kurchaninov and Andrew Little and N Madsen and Joseph Mckenna and Scott Robert Menary and S. C. Napoli and Paul J. Nolan and Konstantin Olchanski and A Olin and Petteri Pusa and Christine O. Rasmussen and Francis Robicheaux and Eli Sarid and C. R. Shields and Daniel Miranda Silveira and Simone Stracka and Chukman So and R Ichard L. Thompson and D. P. Werf and Jonathan S. Wurtele},
  journal={Nature},
  year={2012},
  volume={483},
  pages={439-443}
}
The hydrogen atom is one of the most important and influential model systems in modern physics. Attempts to understand its spectrum are inextricably linked to the early history and development of quantum mechanics. The hydrogen atom’s stature lies in its simplicity and in the accuracy with which its spectrum can be measured and compared to theory. Today its spectrum remains a valuable tool for determining the values of fundamental constants and for challenging the limits of modern physics… 
Characterization of the 1S–2S transition in antihydrogen
TLDR
The shape of the spectral line and the resonance frequency of the 1S–2S transition in antihydrogen agree very well with those of hydrogen, consistent with charge–parity–time invariance at a relative precision of 2 × 10−12—two orders of magnitude more precise than the previous determination.
Observation of the hyperfine spectrum of antihydrogen
TLDR
The results of a microwave spectroscopy experiment in which the response of antihydrogen is probed over a controlled range of frequencies reveal clear and distinct signatures of two allowed transitions, from which a direct, magnetic-field-independent measurement of the hyperfine splitting is obtained.
Laser cooling of antihydrogen atoms
TLDR
The demonstration of laser cooling of antihydrogen and its immediate application has far-reaching implications for antimatter studies, and the demonstrated ability to manipulate the motion of antimatter atoms by laser light will potentially provide ground-breaking opportunities for future experiments.
Trapped antihydrogen: A new frontier in fundamental physics
Antihydrogen, the bound state of an antiproton and a positron, has been produced at low energies at CERN since 2002. Antihydrogen is of interest for use in precision tests of nature's fundamental
Antihydrogen accumulation for fundamental symmetry tests
TLDR
An efficient and high-precision method for trapping and stacking antihydrogen by using controlled plasma is demonstrated, with a record of 54 detected annihilation events from a single release of the trapped anti-atoms accumulated from five consecutive cycles.
Observation of the 1S–2S transition in trapped antihydrogen
TLDR
The observation of the 1S–2S transition in magnetically trapped atoms of antihydrogen is reported, it is determined that the frequency of the transition, which is driven by two photons from a laser at 243 nanometres, is consistent with that expected for hydrogen in the same environment.
Fundamental Physics with Antihydrogen
Antihydrogen—the antimatter equivalent of the hydrogen atom—is of fundamental interest as a test bed for universal symmetries—such as CPT and the Weak Equivalence Principle for gravitation.
ALPHA: antihydrogen and fundamental physics
Detailed comparisons of antihydrogen with hydrogen promise to be a fruitful test bed of fundamental symmetries such as the CPT theorem for quantum field theory or studies of gravitational influence
An improved limit on the charge of antihydrogen from stochastic acceleration
TLDR
By applying stochastic acceleration to trapped antihydrogen atoms, an experimental bound is determined on theAntihydrogen charge, Qe, of |Q| < 0.71 parts per billion (one standard deviation), in which e is the elementary charge.
Two-photon spectroscopy of antiprotonic helium
The precision of laser spectroscopy of antiprotonic helium (a helium atom with one of its electrons replaced by an antiproton) has improved by almost 4 orders of magnitude over its 20 years of
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 40 REFERENCES
Trapped antihydrogen
TLDR
T trapping of antihydrogen atoms is demonstrated and opens the door to precision measurements on anti-atoms, which can soon be subjected to the same techniques as developed for hydrogen.
Search For Trapped Antihydrogen
Abstract We present the results of an experiment to search for trapped antihydrogen atoms with the ALPHA antihydrogen trap at the CERN Antiproton Decelerator. Sensitive diagnostics of the
Cooling Neutral Atoms in a Magnetic Trap for Precision Spectroscopy
A configuration of magnetic fields is exhibited which can harmonically trap paramagnetic particles in a shallow field minimum, superposed on a nearly uniform field which simplifies spectroscopic
Experiments with an Isolated Subatomic Particle at Rest (Nobel Lecture)
The 5th century B.C. philosopher’s Democritus’ smallest conceivable indivisible entity, the a-tomon (the un-cuttable), is a most powerful but not an immutable concept. By 1920 it had already
A magnetic trap for antihydrogen confinement
The goal of the ALPHA collaboration at CERN is to test CPT conservation by comparing the 1S–2S transitions of hydrogen and antihydrogen. To reach the ultimate accuracy of 1 part in 10 18 , the
Autoresonant excitation of antiproton plasmas.
TLDR
It is demonstrated that controllable excitation of the center-of-mass longitudinal motion of a thermal antiproton plasma using a swept-frequency autoresonant drive produces Antihydrogen and starts atomic recombination.
Antihydrogen annihilation reconstruction with the ALPHA silicon detector
The ALPHA experiment has succeeded in trapping antihydrogen, a major milestone on the road to spectroscopic comparisons of antihydrogen with hydrogen. An annihilation vertex detector, which
Evaporative cooling of antiprotons to cryogenic temperatures.
TLDR
The application of evaporative cooling to clouds of trapped antiprotons, resulting in plasmas with measured temperature as low as 9 K, opens up new possibilities for cooling of trapped ions and is of particular interest in antiproton physics.
Towards antihydrogen confinement with the ALPHA antihydrogen trap
ALPHA is an international project that has recently begun experimentation at CERN’s Antiproton Decelerator (AD) facility. The primary goal of ALPHA is stable trapping of cold antihydrogen atoms with
rf spectroscopy of trapped neutral atoms.
TLDR
On rapporte la premiere observation des transitions induites par des radio frequences d'atomes neutres pieges en fonction of the radiofrequence appliquee.
...
1
2
3
4
...