Interacting quantum rotors in oxygen-doped germanium

Shima, Hiroyuki; Nakayama, Tsuneyoshi

doi:10.1103/physrevb.71.155210

Cited by 7 publications

(3 citation statements)

References 46 publications

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“…However, the existing data are in severe contradiction with each other, and not yet settled down to a reliable precision for test of charge symmetry. In addition Shima et al [3] remeasured the photodisintegration of 4 He and reported that the cross section monotonically increases with the excitation energy up to £ r =32 MeV, and no pronounced peak of the GDR was observed at around E 7 =25 MeV. It is much higher than the previously adopted value of 25 MeV.…”

mentioning

confidence: 91%

Dipole Resonances in 4He

Matsumoto¹,

Nakayama²,

Hayami³

et al. 2007

AIP Conference Proceedings

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We investigated the analogs of the giant dipole resonance (GDR) and spin-dipole resonance (SDR) of 4 He by using the 4 He( 7 Li, 7 Be) reaction at an incident energy of 455 MeV and at forward scattering angles. The AS=0 and AS=l spectra for 4 He were obtained by measuring the 0.43-MeV 7 Be y-ray in coincidence with the scattered 7 Be. From the AS=0 and AS=1 spectra thus obtained, the strength distributions of the GDR and SDR in 4 He can be derived and the results are compared with the previous data.

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confidence: 91%

Dipole Resonances in 4He

Matsumoto¹,

Nakayama²,

Hayami³

et al. 2007

AIP Conference Proceedings

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“…Two-dimensional rotational manner has been observed in the experiments of hydrogen on a surface [18][19][20]. The planar rotation in diverse configurations * yyliao@nuk.edu.tw further leads to interesting consequences for energy spectrum [21,22], molecular orientation [23], and specific heat [24,25]. In this work we study the entanglement in a system of two polar molecules confined to a plane.…”

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confidence: 99%

Bell states and entanglement of two-dimensional polar molecules in electric fields

Liao

2017

Eur. Phys. J. D

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Entanglement generated from polar molecules of two-dimensional rotation is investigated in a static electric field. The electric field modulates the rotational properties of molecules, leading to distinctive entanglement. The concurrence is used to estimate the degree of entanglement. When the electric field is applied parallel or perpendicular to the intermolecular direction, the concurrences reveal two overlapping features. Such a pronounced signature corresponds to the coexistence of all Bell-like states. The characteristics of Bell-like states and overlapping concurrences are kept independent of the modulation of dipole-field and dipole-dipole interactions. On the contrary, the Bell-like states fail to coexist in other field directions, reflecting nonoverlapping concurrences. Furthermore, the thermal effect on the entanglement is analyzed for the Bell-like states. Dissimilar suppressed concurrences occur due to different energy structures for the two specific field directions.

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“…This configuration acts as a new hindering potential in addition to the four-fold inversion symmetric potential V h . This argument can be straightforwardly extended to the case of multiple pairs providing many potential minima in the configuration space P = (θ 1 , θ 2 , θ 3 , • • •) [23], where the potential function is…”

mentioning

confidence: 99%

Interacting dipoles in type-I clathrates: Why glass-like though crystalline?

Nakayama¹,

Kaneshita²

2008

Europhys. Lett.

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Quantum tunneling of defects PACS 61.72.Bb -Theories and models of crystal defects PACS 61.43.-j -Disordered solidsAbstract. -Almost identical thermal properties of type-I clathrate compounds to those of glasses follow naturally from the consideration that off-centered guest ions possess electric dipole moments. Local fields from neighbor dipoles create many potential minima in the configuration space. A theoretical analysis based on two-level tunneling states demonstrates that interacting dipoles are a key to quantitatively explain the glass-like behaviors of low-temperature thermal properties of type-I clathrate compounds with off-centered guest ions.

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Interacting quantum rotors in oxygen-doped germanium

Cited by 7 publications

References 46 publications

Dipole Resonances in 4He

Dipole Resonances in 4He

Bell states and entanglement of two-dimensional polar molecules in electric fields

Interacting dipoles in type-I clathrates: Why glass-like though crystalline?

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