CERN Accelerating science

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1.
Qutrit quantum battery: comparing different charging protocols / Gemme, Giulia (Genoa U.) ; Grossi, Michele (CERN) ; Vallecorsa, Sofia (CERN) ; Sassetti, Maura (Genoa U.) ; Ferraro, Dario (Genoa U.)
Motivated by recent experimental observations carried out in superconducting transmon circuits, we compare two different charging protocols for three-level quantum batteries based on time dependent classical pulses. In the first case the complete charging is achieved through the application of two sequential pulses, while in the second the charging occurs in a unique step applying the two pulses simultaneously. [...]
arXiv:2306.14537.- 2024-04-24 - 22 p. - Published in : Phys. Rev. Res. 6 (2024) 023091 Fulltext: 2306.14537 - PDF; Publication - PDF;
2.
IBM quantum platforms: a quantum battery perspective / Gemme, Giulia (Genoa U.) ; Grossi, Michele (CERN) ; Ferraro, Dario (Genoa U. ; CNR-SPIN, Naples) ; Vallecorsa, Sofia (CERN) ; Sassetti, Maura (Genoa U. ; CNR-SPIN, Naples)
We characterize for the first time the performances of IBM quantum chips as quantum batteries, specifically addressing the single-qubit Armonk processor. By exploiting the Pulse access enabled to some of the IBM Quantum processors via the Qiskit package, we investigate advantages and limitations of different profiles for classical drives used to charge these miniaturized batteries, establishing the optimal compromise between charging time and stored energy. [...]
arXiv:2204.10786.- 2022-05-14 - 13 p. - Published in : Batteries 8 (2022) 43 Fulltext: 2204.10786 - PDF; Publication - PDF;
3.
Few-Body Precursors of Topological Frustration / De Filippi, Federico Raffaele (INFN, Trieste) ; Mello, Antonio Francesco (SISSA, Trieste) ; Shaikh, Daniel Sacco (Genoa U.) ; Sassetti, Maura (Genoa U.) ; Ziani, Niccolò Traverso (Genoa U.) ; Grossi, Michele (CERN)
Quantum spin chains - the prototypical model for coupled two-level systems - offer a fertile playground both for fundamental and technological applications, ranging from the theory of thermalization to quantum computation. The effects of frustration induced by the boundary conditions have recently been addressed in this context. [...]
arXiv:2401.09536.- 2024-08-20 - 19 p. - Published in : Symmetry 16 (2024) 1078 Fulltext: Publication - PDF; 2401.09536 - PDF;
4.
Rydberg-positronium velocity and self-ionization studies in a 1T magnetic field and cryogenic environment / AEgIS Collaboration
We characterized the pulsed Rydberg-positronium production inside the AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) apparatus in view of antihydrogen formation by means of a charge exchange reaction between cold antiprotons and slow Rydberg-positronium atoms. Velocity measurements on positronium along two axes in a cryogenic environment (10K) and in 1T magnetic field were performed. [...]
arXiv:1911.04342.- 2020-07-02 - 10 p. - Published in : Phys. Rev. A 102 (2020) 013101 Fulltext: 1911.04342 - PDF; arXiv:1911.04342 - PDF; Fulltext from publisher: PDF;
5.
IBM Quantum Platforms: A Quantum Battery Perspective / Gemme, Giulia (speaker) (Università di Genova, Italy)
In the last few years, the progressive miniaturization of devices has approached the size of atoms and molecules. The study of these quantum systems out of equilibrium contributed to the advancement of quantum thermodynamics. [...]
2023 - 2212. QTI Lectures External link: Event details In : IBM Quantum Platforms: A Quantum Battery Perspective
6.
Overview of recent work on laser excitation of positronium for the formation of antihydrogen / Yzombard, P (LAC, Orsay) ; Amsler, C (Bern U., LHEP) ; Ariga, T (Bern U., LHEP) ; Bonomi, G (Brescia U. ; INFN, Pavia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Cabaret, L (LAC, Orsay) ; Caccia, M (INFN, Milan) ; Caravita, R (Genoa U. ; INFN, Genoa ; CERN) ; Castelli, F (INFN, Milan ; Milan U.) et al.
The AEgIS experiment carried out at CERN aims to form a cold antihydrogen beam to perform precision studies on gravity. A key ingredient is the creation of antihydrogen via a charge-exchange process between trapped antiprotons and Rydberg excited positronium atoms (Ps). [...]
2017 - 11 p. - Published in : JPS Conf. Proc. 18 (2017) 011026 Fulltext: PDF;
In : 12th International Conference on Low Energy Antiproton Physics, Kanazawa, Japan, 6 - 11 Mar 2016, pp.011026
7.
Positronium for Antihydrogen Production in the AEGIS Experiment / Consolati, G (Milan Polytechnic ; INFN, Milan) ; Aghion, S (Milan Polytechnic ; INFN, Milan) ; Amsler, C (Stefan Meyer Inst. Subatomare Phys.) ; Bonomi, G (INFM, Brescia ; INFN, Pavia) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Caccia, M (INFN, Milan ; Insubria U., Como) ; Caravita, R (Genoa U. ; INFN, Genoa ; CERN) ; Castelli, F (INFN, Milan ; Milan U.) ; Cerchiari, G (Heidelberg, Max Planck Inst.) ; Comparat, D (LAC, Orsay) et al.
The primary goal of the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEGIS) collaboration is to measure for the first time precisely the gravitational acceleration of antihydrogen, H¯ , a fundamental issue of contemporary physics, using a beam of antiatoms. Indeed, although indirect arguments have been raised against a different acceleration of antimatter with respect to matter, nevertheless some attempts to formulate quantum theories of gravity, or to unify gravity with the other forces, consider the possibility of a non-identical gravitational interaction between matter and antimatter. [...]
2017 - 7 p. - Published in : Acta Phys. Pol. A 132 (2017) 1443-1449 Fulltext: PDF;
In : 12th International Workshop on Positron and Positronium Chemistry, Lublin, Poland, August 28-September 1, 2017, pp.1443-1449
8.
Coded masks for imaging of neutrino events / NU@FNAL Collaboration
The capture of scintillation light emitted by liquid Argon and Xenon under molecular excitations by charged particles is still a challenging task. Here we present a first attempt to design a device able to grab sufficiently high luminosity in order to reconstruct the path of ionizing particles. [...]
arXiv:2105.10820.- 2021-11-17 - 15 p. - Published in : Eur. Phys. J. C 81 (2021) 1011 Fulltext: 2105.10820 - PDF; document - PDF; Fulltext from publisher: PDF;
9.
Efficient $2^3S$ positronium production by stimulated decay from the $3^3P$ level / AEgIS Collaboration
We investigate experimentally the possibility of enhancing the production of $2^3S$ positronium atoms by driving the $1^3S$-$3^3P$ and $3^3P$-$2^3S$ transitions, overcoming the natural branching ratio limitation of spontaneous decay from $3^3P$ to $2^3S$. The decay of $3^3P$ positronium atoms towards the $2^3S$ level has been effciently stimulated by a 1312.2nm broadband IR laser pulse. [...]
arXiv:1904.09004.- 2019-12-09 - 6 p. - Published in : Phys. Rev. A 100 (2019) 063414 Fulltext: PDF;
10.
The AEgIS experiment: towards antimatter gravity measurements / AEgIS Collaboration
(Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is a CERN based experiment aiming to probe the Weak Equivalence Principle of General Relativity with antimatter by studying free fall of antihydrogen in the Earth’s gravitational field. A pulsed cold beam of antihydrogen produced by charge exchange between Rydberg positronium and cold antiprotons will be horizontally accelerated by an electric field gradient. [...]
2019 - 4 p. - Published in : J. Phys.: Conf. Ser. 1390 (2019) 012104 Fulltext: PDF;
In : The 4th International Conference on Particle Physics and Astrophysics, Moscow, Russian Federation, 22 - 26 Oct 2018, pp.012104

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