Extended Glauber model of antiproton-nucleus annihilation for all energies and mass numbers

Lee, Teck-Ghee; Wong, Cheuk‐Yin

doi:10.1103/physrevc.89.054601

Cited by 10 publications

(24 citation statements)

References 37 publications

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“…3(c) shows a plot of σ BI ann (L) given by Eq. (12). As expected, the L = 0 curve faithfully follows the 1/p dependence which seems to imply the difference…”

Section: Semiclassical Analyses Of the Annihilation Oscillations And ...supporting

confidence: 81%

“…To unravel this mystery, there has been a great deal of experimental and theoretical investigations on matter-antimatter interactions. So far, most of the obtained information centers around antiproton-nucleus (pA) reactions and structures [2][3][4][5][6][7][8][9][10][11][12][13][14]. The corresponding information on antineutron-nucleus (nA) reaction [15], on the other hand, remains comparatively sparse and limited with the most recent work from the OBELIX's collaboration [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Pocket resonances in low-energy antineutrons reactions with nuclei

Lee,

Bayrak,

Wong

2021

Preprint

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Upon investigating whether the variation of the antineutron-nucleus annihilation cross-sections at very low energies satisfy Bethe-Landau's power law of σann(p) ∝ 1/p α behavior as a function of the antineutron momentum p, we uncover unexpected regular oscillatory structures in the low antineutron energy region from 0.001 to 10 MeV, with small amplitudes and narrow periodicity in the logarithm of the antineutron energies, for large-A nuclei such as Pb and Ag. Subsequent semiclassical analyses of the S matrices reveal that these oscillations are pocket resonances that arise from quasi-bound states inside the pocket and the interference between the waves reflecting inside the optical potential pockets with those from beyond the potential barriers, implicit in the nuclear Ramsauer effect. They are the continuation of bound states in the continuum. Experimental observations of these pocket resonances will provide vital information on the properties of the optical model potentials and the nature of the antineutron annihilation process.d This manuscript has been authored in part by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan),

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“…3(c) shows a plot of σ BI ann (L) given by Eq. (12). As expected, the L = 0 curve faithfully follows the 1/p dependence which seems to imply the difference…”

Section: Semiclassical Analyses Of the Annihilation Oscillations And ...supporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Pocket resonances in low-energy antineutrons reactions with nuclei

Lee,

Bayrak,

Wong

2021

Preprint

Self Cite

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“…As a result of these competing effects, optimal correlated two-particles motion occurs at an intermediate coupling strength [15]. It has been previously reported that such competition also leads to a nonmonotonic behavior of the BO amplitude [17] and Anderson localization [34,35].…”

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confidence: 99%

Quantum entanglement and drifting generated by an ac field resonant with frequency-doubled Bloch oscillations of correlated particles

2016

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We show that initially localized and uncorrelated two-particles quantum wavepackets evolving in a one-dimensional discrete lattice become strongly entangled while drifting under the action of an harmonic AC field resonant with doubled Bloch oscillations promoted by a static DC field. Although partial entanglement is achieved when the AC field is resonant with the single-particle Bloch oscillations, it is strongly limited by the survival of anti-correlated unbounded states. We further show that the phase dependence of the wavepacket centroid velocity is similar to the semiclassical behavior depicted by a single-particle. However, the drift velocity exhibits a non-trivial non-monotonic dependence on the interaction strength, vanishing in the limit of uncorrelated particles, that unveils its competing influence on unbounded and bounded states.Recent experiments investigating the behavior of few interacting atoms in optical lattices[1] opened the possibility to generate a variety of quantum entangled matter states that can have a great impact on the search for universal and more efficient quantum computation processes, quantum sensing and metrology [2][3][4]. It has been experimentally demonstrated that quantum entangled atom pairs perform Bloch oscillations (BOs) at twice the fundamental frequency in tilted optical lattices (TOLs) [1]. BO is the phenomenon of oscillatory motion of wavepackets placed in a periodic potential when driven by a constant force [5,6]. It has been observed in several physical contexts such as semiconductors superlattices [7,8], ultra-cold atoms[9-13], optical[8] and acoustic waves [14]. The coherent phenomenon of frequency doubling of BOs was predicted to occur in the presence of interaction [15][16][17][18][19] because two particles bind together and perform correlated tunneling. Fractional BOs at multiples of the fundamental BO frequency have also been demonstrated for larger clusters of interacting particles [20]. A photonic realization of the BOs frequency doubling has been proposed [21,22] and experimentally achieved in waveguide lattices [23]. Its experimental demonstration with ultra-cold atoms of bosonic 87 Rb in decoupled one-dimensional tubes of an optical lattice[1] represents an important step towards the investigation of essential features of quantum many-body states.Unidirectional transport and super-BOs can be induced when wavepackets are driven by superposed static and harmonic fields [24][25][26][27][28][29][30]. It is achieved when the harmonic field is resonant with the underlying BO frequency, which depends linearly on the strength of the static field. A small detuning from the resonant condition results in super-BOs due to an effective tunneling renormalization. This phenomenology has been experimentally demonstrated in a weakly interacting Bose-Einstein condensate of Cs atoms placed in a TOL under forced driving, achieving matter-wave transport over macroscopic distances [26]. It has been theoretically demonstrated that some features of super-BOs and unidirectional tra...

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“…From Eq. (20) with b(t) = 1 we have ω(t) = 1 while recall that m(t) = 1, thus M (z) = Ω(z) = 1 and from (7), (8) we find a 0 (z) = 1, a 2 (z) = 0. From Eq.…”

Section: Engineering the Lattice Output Using Shortcuts To Adiabmentioning

confidence: 92%

“…Many recent studies have demonstrated that a family of photonic lattices, implemented in arrays of evenescently coupled waveguides [1], provides the ideal testbed for a large variety of quantum phenomena [2]. We mention the observation in these lattices of Bloch-like revivals [3][4][5], Anderson localization of light [6][7][8], and the classical analog of coherent states and quantum correlations [9,10], to name a few. On the other hand, ideas from quantum mechanics have inspired the design of optical structures with desired properties.…”

Section: Introductionmentioning

confidence: 99%

Design of a photonic lattice using shortcuts to adiabaticity

Stefanatos¹

2014

Phys. Rev. A

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In this article we use the method of shortcuts to adiabaticity to design a photonic lattice (array of waveguides) which can drive the input light to a controlled location at the output. The output position in the array is determined by functions of the propagation distance along the waveguides, which modulate the lattice characteristics (index of refraction, first and second neighbor couplings). The proposed coupler is expected to posses the robustness properties of the design method, coming from its adiabatic nature, and also to have a smaller footprint than purely adiabatic couplers. The present work provides a very interesting example where methods from quantum control can be exploited to design lattices with desired input-output properties.

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Extended Glauber model of antiproton-nucleus annihilation for all energies and mass numbers

Cited by 10 publications

References 37 publications

Pocket resonances in low-energy antineutrons reactions with nuclei

Pocket resonances in low-energy antineutrons reactions with nuclei

Quantum entanglement and drifting generated by an ac field resonant with frequency-doubled Bloch oscillations of correlated particles

Design of a photonic lattice using shortcuts to adiabaticity

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