AbstractNeutron stars are cosmic laboratories to study dense matter in quantum
chromodynamics (QCD). The observable mass-radius relations of neutron stars are
determined by QCD equations of state and can reflect the properties of QCD phase
transitions. In the last decade, there have been historical discoveries in
neutron stars; the discoveries of two-solar mass neutron stars and neutron star
merge... hiện toàn bộ
AbstractThere had been remarkable progress in developing third-generation
electron storage rings as the main sources of very bright photon beams.
Fourth-generation storage rings based on the multi-bend achromat lattice concept
may be able to surpass the brightness and coherence that are attained using
present third-generation storage rings. In this paper, we survey ongoing work
around the world to... hiện toàn bộ
AbstractIn this work, we study the $$D\bar{D}$$ D D ¯ , DD, $$D\bar{D}_s$$ D D ¯
s , $$DD_s$$ D D s , $$D_s\bar{D}_s$$ D s D ¯ s and $$D_sD_s$$ D s D s
tetraquark molecular states with the $$J^{PC}=0^{++}$$ J PC = 0 + + via the QCD
sum rules. The prediction $$M_{D_s\bar{D}_s} = 3.98\pm 0.10\, \text {GeV}$$ M D
s D ¯ s = 3.98 ± 0.10 GeV is in very good agreement with the experimental value
$$M_{X(3... hiện toàn bộ
We review a recent progress of a superconductivity and a charge Kondo effect
mediated by valence skippers which are elements skipping the valence state. To
understand the valence skipping phenomenon, we introduce a negative-U effect
phenomenologically, and we show an origin of the negative-U effect, a
superconductivity and charge Kondo effect based on the negative-U effect. We
also show a new mech... hiện toàn bộ
AbstractIn this article, we review the recent progress of the scanning tunneling
microscopy studies of 1T-TaS2 and 1T-TaSe2 for bulk single crystals and
molecular beam epitaxy monolayer films. We focus on how to understand the Mott
insulating state in the whole set of materials, even when the stacking order
takes effect. Based on this understanding, we discuss tuning the Mott insulator
to a metall... hiện toàn bộ
AbstractThe uncertainty relation is regarded as a remarkable feature of quantum
mechanics differing from the classical counterpart, and it plays a backbone role
in the region of quantum information theory. In principle, the uncertainty
relation offers a nontrivial limit to predict the outcome of arbitrarily
incompatible observed variables. Therefore, to pursue a more general uncertainty
relations ... hiện toàn bộ
AbstractA new rare-isotope beam (RIB) accelerator complex, RAON, is under
construction in South Korea. RAON employs two RIB production methods, namely,
isotope separation online (ISOL) and in-flight fragmentation (IF). According to
the original design, ISOL and IF can run independently, and RAON ultimately
combines them to provide more neutron-rich ion beams for the experiments. In
2021, due to th... hiện toàn bộ
AbstractSolving linear differential equations is a common problem in almost all
fields of science and engineering. Here, we present a variational algorithm with
shallow circuits for solving such a problem: given an $$N \times N$$ N × N
matrix $${\varvec{A}}$$ A , an N-dimensional vector $$\varvec{b}$$ b , and an
initial vector $$\varvec{x}(0)$$ x ( 0 ) , how to obtain the solution vector
$$\varvec... hiện toàn bộ
AbstractA molecular rotor is a molecule/molecular system that performs rotary
motions under an external stimulus. Molecular rotors are promising for
applications in medicine, optical usage, information science, etc. A molecular
rotor is also a crucial component in constructing more sophisticated functional
molecular machines. Anchoring molecular rotors on surfaces is regarded as a
feasible way of ... hiện toàn bộ
AbstractThe angular distance of the solar flares to the projective point of the
center of the solar disk on the solar spherical surface has been studied by the
heliographical or helioprojective coordinates, during the periods 1975–2021 for
GOES events and 2002–2021 for RHESSI events, hereafter “distance.” It gives a
specific distribution curvature. It has also been noted that when using the
number... hiện toàn bộ