Colloquium: Positronium physics and biomedical applications
Positronium is the simplest bound state, built of an electron and a positron. Studies of
positronium in vacuum and its decays in medium tell us about quantum electrodynamics …
positronium in vacuum and its decays in medium tell us about quantum electrodynamics …
Bound-state relativistic quantum electrodynamics: A perspective for precision physics with atoms and molecules
Precision physics aims to use atoms and molecules to test and develop the fundamental
theory of matter, possibly beyond the Standard Model. Most of the atomic and molecular …
theory of matter, possibly beyond the Standard Model. Most of the atomic and molecular …
Discrete symmetries tested at 10−4 precision using linear polarization of photons from positronium annihilations
Discrete symmetries play an important role in particle physics with violation of CP connected
to the matter-antimatter imbalance in the Universe. We report the most precise test of P, T …
to the matter-antimatter imbalance in the Universe. We report the most precise test of P, T …
Positronium Laser Cooling via the Transition with a Broadband Laser Pulse
We report on laser cooling of a large fraction of positronium (Ps) in free flight by strongly
saturating the 1 3 S-2 3 P transition with a broadband, long-pulsed 243 nm alexandrite laser …
saturating the 1 3 S-2 3 P transition with a broadband, long-pulsed 243 nm alexandrite laser …
Single-photon large-momentum-transfer atom interferometry scheme for Sr or Yb atoms with application to determining the fine-structure constant
The leading experimental determinations of the fine-structure constant α currently rely on
atomic photon-recoil measurements from Ramsey-Bordé atom interferometry with large …
atomic photon-recoil measurements from Ramsey-Bordé atom interferometry with large …
Two-body -state energies at order
We present an analytical calculation of the complete α 6 correction to energies of n P levels
of two-body systems consisting of the spin-0 or-1/2 extended-size particles with arbitrary …
of two-body systems consisting of the spin-0 or-1/2 extended-size particles with arbitrary …
Precision Microwave Spectroscopy of the Positronium Interval
We report the results of a new measurement of the positronium 2 S 3 1→ 2 P 3 2 (ν 2)
interval. Using a modified experimental arrangement we have significantly reduced the …
interval. Using a modified experimental arrangement we have significantly reduced the …
Cooling positronium to ultralow velocities with a chirped laser pulse train
When laser radiation is skilfully applied, atoms and molecules can be cooled,–, allowing the
precise measurements and control of quantum systems. This is essential for the fundamental …
precise measurements and control of quantum systems. This is essential for the fundamental …
QED corrections to the correlated relativistic energy: One-photon processes
This work is a collection of initial calculations and formal considerations within the Salpeter–
Sucher exact equal-time relativistic quantum electrodynamics framework. The calculations …
Sucher exact equal-time relativistic quantum electrodynamics framework. The calculations …
[HTML][HTML] Photoproduction of QED bound states in future electron-ion colliders
In this work we perform an exploratory study of the photoproduction of singlet QED bound
states (l− l+) S in electron-ion collisions at the EicC, EIC and LHeC energies. The total cross …
states (l− l+) S in electron-ion collisions at the EicC, EIC and LHeC energies. The total cross …