7 research outputs found
Motions of the String Solutions in the XXZ Spin Chain under a Varying Twist
We determine the motions of the roots of the Bethe ansatz equation for the
ground state in the XXZ spin chain under a varying twist angle. This is done by
analytic as well as numerical study at a finite size system. In the attractive
critical regime , we reveal intriguing motions of strings due
to the finite size corrections to the length of the strings: in the case of
two-strings, the roots collide into the branch points perpendicularly to the
imaginary axis, while in the case of three-strings, they fluctuate around the
center of the string. These are successfully generalized to the case of
-string. These results are used to determine the final configuration of the
momenta as well as that of the phase shift functions. We obtain these as well
as the period and the Berry phase also in the regime ,
establishing the continuity of the previous results at to
this regime. We argue that the Berry phase can be used as a measure of the
statistics of the quasiparticle ( or the bound state) involved in the process.Comment: An important reference is added and mentioned at the end of the tex
Left atrial extension of metastatic lung tumor via pulmonary vein: report on the first case of Ewing sarcoma
Extension of metastatic lung tumors into the left atrium via pulmonary veins is rare. Here, we report the first case of Ewing sarcoma exhibiting such extension. A 31-year-old man with pulmonary metastasis from Ewing sarcoma presented with a mass in the left lung, extending to the left atrium through the left inferior pulmonary vein. As the patient was considered to be at risk of tumor embolism, the mass was excised surgically
Induced Chern-Simons terms and intrinsic polarization of the Dirac sea in 1 + 2 dimensions
Interim safety and clinical activity of nivolumab (Nivo) in combination with S-1/capecitabine plus oxaliplatin in patients (pts) with previously untreated unresectable advanced or recurrent gastric/gastroesophageal junction (G/GEJ) cancer: part 1 study of ATTRACTION-04 (ONO-4538-37)
Spin hall effect associated with SU(2) gauge field
In this paper, we focus on the connection between spin Hall effect and spin
force. Here we investigate that the spin force due to spin-orbit coupling,
which in two-dimensional system is equivalent to forces of Hirsch and
Chudnovsky besides constant factors 3 and 3/2 respectively, is a part of
classic Anandan force, and that the spin Hall effect is an anomalous Hall
effect. Furthermore, we develop the method of AC phase to derive the formula
for the spin force, and find that the most basic spin Hall effect originates
from the AC phase and is therefore an intrinsic quantum mechanical property of
spin. This method differs from approach of Berry phase in the study of
anomalous Hall effect, which is the intrinsic property of the perfect crystal.
On the other hand, we use an elegant skill to show that the Chudnovsky-Drude
model is reasonable, and further have improved the theoretical values of spin
Hall conductivity of Chudnovsky. Compared to the theoretical values of spin
Hall conductivity in the Chudnovsky-Drude model, ours are in better agreement
with experimentation. Finally, we discuss the relation between spin Hall effect
and fractional statistics.Comment: 16 pages, 5 figures, 1 tabl