In this article,we discuss a method to control the long-range interactions between bosons in a threedimensional Bose-Fermi mixture with the help of optical lattices on fermions.We find the range and the peaked momentu...In this article,we discuss a method to control the long-range interactions between bosons in a threedimensional Bose-Fermi mixture with the help of optical lattices on fermions.We find the range and the peaked momentum of the fermion-mediated interactions can be tuned by the optical lattice depth and the fermion density.If the fermion density is close to half-filling,roton excitations can be generated with weak Bose-Fermi interactions.Further,if the fermions are not exact at half-filling,multi-roton structure may emerge,implying competing density orders.Therefore,tuning the lattice depth and the fermion density in a Bose-Fermi mixture serves as an effective way to control the interaction range and resonant momentum between bosons.展开更多
A recent study by Farrelly,L.A.et al.published in Nature showed that the serotonylation of glutamine at the Q5 site in histone H3 promotes the recruitment of TFIID in collaboration with adjacent H3K4 trimethylation 1....A recent study by Farrelly,L.A.et al.published in Nature showed that the serotonylation of glutamine at the Q5 site in histone H3 promotes the recruitment of TFIID in collaboration with adjacent H3K4 trimethylation 1.Protein posttranslational modifications(PTMs)of histones are associated with diverse biological processes through dynamically modulating chromatin structure and the transcriptional activity of genes 2.Epigenetic regulations are an integral part of brain functions ranging from the development of the nervous system beyond basic neurological functions to higher-order cognitive processes 3.展开更多
For the numerical simulation of the fractional quantum Hall(FQH) effects on a finite disk, the rotational symmetry is the only symmetry that is used in diagonalizing the Hamiltonian. In this work, we propose a method ...For the numerical simulation of the fractional quantum Hall(FQH) effects on a finite disk, the rotational symmetry is the only symmetry that is used in diagonalizing the Hamiltonian. In this work, we propose a method of using the weak translational symmetry for the center of mass of the many-body system. With this approach, the bulk properties, such as the energy gap and the magneto-roton excitation are consistent with those in the closed manifolds like the sphere and torus. As an application, we consider the FQH phase and its phase transition in the fast rotated dipolar fermions. We thus demonstrate the disk geometry having versatility in analyzing the bulk properties beside the usual edge physics.展开更多
Recently, the extraordinary structures and physiological activities of silatrane compounds have been paid much attention to and been studied with various physicoehemical methods by many authors. The concept of pentaco...Recently, the extraordinary structures and physiological activities of silatrane compounds have been paid much attention to and been studied with various physicoehemical methods by many authors. The concept of pentacoordinated silicon and tetracoordinated nitrogen in these compounds has been proposed. However, there is still much controversy about it.展开更多
We investigate the effective interaction between two heavy impurities immersed in a quasi-twodimensional dipolar Bose-Einstein condensate via a variation approach.We show that the mediated interaction is highly tunabl...We investigate the effective interaction between two heavy impurities immersed in a quasi-twodimensional dipolar Bose-Einstein condensate via a variation approach.We show that the mediated interaction is highly tunable via the contact and the dipole-dipole interactions between the background gas atoms.Interestingly,the mediated interaction potential may become an oscillating function of inter-impurity distance when roton excitation emerges under sufficiently strong dipolar interaction.Our system therefore provides an efficient way for tuning the mediated interaction between impurities.展开更多
基金support by the China Scholarship Council(CSC).This research has additionally been funded by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)under Germany’s Excellence Strategy via the Excellence Cluster“3D Matter Made to Order”(Grant No.EXC-2082/1-390761711)which has also been supported by the Carl Zeiss Foundation through the“Carl-Zeiss-Foundation-Focus@HEiKA”,by the State of Baden-Württemberg,and by the Karlsruhe Institute of Technology(KIT).We further acknowledge support by the Helmholtz program“Materials Systems Engineering”(MSE).Muamer Kadic is grateful for support by the EIPHI Graduate School(Grant No.ANR-17-EURE-0002)Changguo Wang is grateful for support by the National Natural Science Foundation of China(Grant No.12172102).
基金Supported by National Natural Science Foundation of China under Grant Nos.11604225,11734010Beijing Natural Science Foundation(Z180013)Foundation of Beijing Education Committees under Grant No.KM201710028004
文摘In this article,we discuss a method to control the long-range interactions between bosons in a threedimensional Bose-Fermi mixture with the help of optical lattices on fermions.We find the range and the peaked momentum of the fermion-mediated interactions can be tuned by the optical lattice depth and the fermion density.If the fermion density is close to half-filling,roton excitations can be generated with weak Bose-Fermi interactions.Further,if the fermions are not exact at half-filling,multi-roton structure may emerge,implying competing density orders.Therefore,tuning the lattice depth and the fermion density in a Bose-Fermi mixture serves as an effective way to control the interaction range and resonant momentum between bosons.
文摘A recent study by Farrelly,L.A.et al.published in Nature showed that the serotonylation of glutamine at the Q5 site in histone H3 promotes the recruitment of TFIID in collaboration with adjacent H3K4 trimethylation 1.Protein posttranslational modifications(PTMs)of histones are associated with diverse biological processes through dynamically modulating chromatin structure and the transcriptional activity of genes 2.Epigenetic regulations are an integral part of brain functions ranging from the development of the nervous system beyond basic neurological functions to higher-order cognitive processes 3.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11674041,91630205,11474144,and 11847301)Chongqing Research Program of Basic Research and Frontier Technology(Grant No.cstc2017jcyjAX0084)FRF for the Central Universities(Grant No.2019CDJDWL0005)
文摘For the numerical simulation of the fractional quantum Hall(FQH) effects on a finite disk, the rotational symmetry is the only symmetry that is used in diagonalizing the Hamiltonian. In this work, we propose a method of using the weak translational symmetry for the center of mass of the many-body system. With this approach, the bulk properties, such as the energy gap and the magneto-roton excitation are consistent with those in the closed manifolds like the sphere and torus. As an application, we consider the FQH phase and its phase transition in the fast rotated dipolar fermions. We thus demonstrate the disk geometry having versatility in analyzing the bulk properties beside the usual edge physics.
文摘Recently, the extraordinary structures and physiological activities of silatrane compounds have been paid much attention to and been studied with various physicoehemical methods by many authors. The concept of pentacoordinated silicon and tetracoordinated nitrogen in these compounds has been proposed. However, there is still much controversy about it.
基金the NSFC(Grants No.11674334,No.11974363,and No.11947302)the Strategic Priority Research Program of CAS(Grant No.XDB28000000)the Thousand-Youth-Talent Program of China。
文摘We investigate the effective interaction between two heavy impurities immersed in a quasi-twodimensional dipolar Bose-Einstein condensate via a variation approach.We show that the mediated interaction is highly tunable via the contact and the dipole-dipole interactions between the background gas atoms.Interestingly,the mediated interaction potential may become an oscillating function of inter-impurity distance when roton excitation emerges under sufficiently strong dipolar interaction.Our system therefore provides an efficient way for tuning the mediated interaction between impurities.
