Matter-wave interferometry: towards antimatter interferometers

Sala, Simone; Castelli, F.; Giammarchi, M.; Siccardi, Stefano; Olivares, Stefano

doi:10.1088/0953-4075/48/19/195002

Cited by 15 publications

(37 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in fig. 3, the fringes contrast as a function of energy disagrees with projective classical mechanics and is in agreement with the quantum mechanical model of the system 17,18 . This is the first demonstration of antimatter quantum interference.…”

Section: Discussionsupporting

confidence: 72%

See 1 more Smart Citation

First Demonstration of Antimatter Quantum Interferometry

Giammarchi

2020

CPT and Lorentz Symmetry

View full text Add to dashboard Cite

On behalf of the QUPLAS CollaborationThis paper describes the first experimental evidence of antimatter-wave interference, a process at the heart of Quantum Physics and its interpretation. For the case of ordinary matter particles, interference phenomena have been observed in a variety of cases, ranging from electrons up to complex molecules. Here I present the first demonstration of single-positrons quantum interference.

show abstract

Section: Discussionsupporting

confidence: 72%

“…suitable for anti-electrons (positrons) in the 5-18 keV energy range. This development is part of the QUPLAS (QUantum interferometry and gravitation with Positrons and LASers) research program[17][18][19][20] . Sketch of the setup: the beam, prepared by two 2-mm-wide collimators, reaches the gratings and the emulsion detector.…”

mentioning

confidence: 99%

First Demonstration of Antimatter Quantum Interferometry

Giammarchi

2020

CPT and Lorentz Symmetry

View full text Add to dashboard Cite

show abstract

“…Ps atom interferometry has not been achieved experimentally, although some discussion exists in the literature [764,765,798]. The way in which Ps atoms are produced means that it is not possible to generate coherent atom sources.…”

Section: Antimatter Gravity Experimentsmentioning

confidence: 99%

Experimental progress in positronium laser physics

2018

View full text Add to dashboard Cite

Abstract. The field of experimental positronium physics has advanced significantly in the last few decades, with new areas of research driven by the development of techniques for trapping and manipulating positrons using Surko-type buffer gas traps. Large numbers of positrons (typically ≥10 6 ) accumulated in such a device may be ejected all at once, so as to generate an intense pulse. Standard bunching techniques can produce pulses with ns (mm) temporal (spatial) beam profiles. These pulses can be converted into a dilute Ps gas in vacuum with densities on the order of 10 7 cm −3 which can be probed by standard ns pulsed laser systems. This allows for the efficient production of excited Ps states, including long-lived Rydberg states, which in turn facilitates numerous experimental programs, such as precision optical and microwave spectroscopy of Ps, the application of Stark deceleration methods to guide, decelerate and focus Rydberg Ps beams, and studies of the interactions of such beams with other atomic and molecular species. These methods are also applicable to antihydrogen production and spectroscopic studies of energy levels and resonances in positronium ions and molecules. A summary of recent progress in this area will be given, with the objective of providing an overview of the field as it currently exists, and a brief discussion of some future directions.

show abstract

“…Specifically, for pursuing this objective, measurements made on Ps atoms are complementary to other experiments currently commissioning or running [13][14][15][16] employing antihydrogen; in the former case one expects that the possible absence of a free fall can be a clear signature of an antigravity component in the gravitational interaction violating the weak equivalence principle. Experimental proposals currently under evaluation are based on detecting the free fall of Ps atoms, either by guiding a Rydberg Ps beam towards a position-sensitive detector with electrostatic potentials [17] or by accurately measuring the vertical displacement of the atoms' trajectory with a matter-wave optical interferometer [18] or with a matter-wave mechanical interferometer in a novel TalbotLau configuration for increased compactness [19]. Whichever experimental layout will be found most suitable, it will anyway be necessary to prepare a sample of Ps atoms in a long-lived state, otherwise the rapid annihilation would quickly reduce their useful number making it very difficult, for instance, to distinguish an interferometric pattern against the background.…”

Section: S-2mentioning

confidence: 99%

“…A collimated beam of metastable Ps atoms has been shown to be extremely useful for improving inertial sensitivity in proposed matter-wave interferometric layouts [18,19].…”

Section: S-2mentioning

confidence: 99%

Producing long-lived 23S positronium via 33P laser excitation in magnetic and electric

Aghion¹,

Amsler²,

Antonello³

et al. 2018

Phys. Rev. A

View full text Add to dashboard Cite

Producing positronium (Ps) in the metastable 2 3 S state is of interest for various applications in fundamental physics. We report here on an experiment in which Ps atoms are produced in this long-lived state by spontaneous radiative decay of Ps excited to the 3 3 P level manifold. The Ps cloud excitation is obtained with a UV laser pulse in an experimental vacuum chamber in presence of guiding magnetic field of 25 mT and an average electric field of 300 V cm −1 . The evidence of the 2 3 S state production is obtained to the 3.6σ level of statistical significance using a novel analysis technique of the single-shot positronium annihilation lifetime spectra. The dynamic of the Ps population on the involved levels has been studied with a rate equation model.

show abstract

Matter-wave interferometry: towards antimatter interferometers

Cited by 15 publications

References 40 publications

First Demonstration of Antimatter Quantum Interferometry

First Demonstration of Antimatter Quantum Interferometry

Experimental progress in positronium laser physics

Producing long-lived 23S positronium via 33P laser excitation in magnetic and electric

Contact Info

Product

Resources

About