Travertine Mineralogical Characteristics and Spatial Distribution in Huanglong, China, a World Natural Heritage: Derived from Late Pleistocene to Early Holocene Glacial U-Shaped Valley Carbonate Deposits.

In the long and complex process of geological evolution, the rise of the Himalayan movement and the strong Quaternary glacial movement 400,000 years ago have shaped the highly distinctive travertine landform landscape of Huanglong, China. The overflow of karst water in the high travertine layer has formed magnificent waterfalls and wonderful karst caves as well as the world's largest open-air travertine beaches and pools. The unique travertine landscape has entered the public's vision.

Spin-resolved counting statistics as a sensitive probe of spin correlation in transport through a quantum dot spin valve.

We investigate the noise in spin transport through a single quantum dot (QD) tunnel coupled to ferromagnetic (FM) electrodes with noncollinear magnetizations. Based on a spin-resolved quantum master equation, auto- and cross-correlations of spin-resolved currents are analyzed to reveal the underlying spin transport dynamics and characteristics for various polarizations. We find the currents of majority and minority spins could be strongly autocorrelated despite uncorrelated charge transfer.

Spin-selective thermoelectric transport along a vibrating-helical protein molecule.

Motivated by the development of bio-thermoelectricity and spin caloritronics, we studied the nonlinear spin-selective transport along a vibrating-helical protein molecule in the presence of thermal bias by using the standard nonequilibrium Green's function formalism. Our results demonstrate that the thermal bias induces the oscillation of spin-polarization between positive and negative values accompanied by spin current with increasing the chain length. Moreover, even for the very short preparable peptide chains, external electron-phonon interaction can give rise to the spin-selectivity, whereas characteristic electron-phonon interaction can not, but in conjunction with thermal bias, it has an important impact on the total current's direction and the spin-polarized current intensity.

Diversity and distribution of CO-fixing microbial community along elevation gradients in meadow soils on the Tibetan Plateau.

Soil CO-fixing microbes play a significant role in CO-fixation in the terrestrial ecosystems, particularly in the Tibetan Plateau. To understand carbon sequestration by soil CO-fixing microbes and the carbon cycling in alpine meadow soils, microbial diversity and their driving environmental factors were explored along an elevation gradient from 3900 to 5100 m, on both east and west slopes of Mila Mountain region on the Tibetan Plateau. The CO-fixing microbial communities were characterized by high-throughput sequencing targeting the cbbL gene, encoding the large subunit for the CO-fixing protein ribulose 1, 5-bisphosphate carboxylase/oxygenase.

Nonequilibrium Kondo regime current noise spectrum of quantum dot systems with the single impurity Anderson model.

We investigate the nonequilibrium current noise spectrum of single impurity Anderson model quantum dot systems on the basis of the accurate dissipation equation of motion evaluations. By comparing between the equilibrium and nonequilibrium cases and between the non-Kondo and Kondo regimes, we identify the current noise spectrum of the nonequilibrium Kondo features that actually appear in the entire region of ω ∈ [-eV, eV]. It is well known that the primary Kondo characteristics at ω = ±eV = ±(μ - μ) display asymmetrical upturns and remarkable peaks in S(ω) and dS(ω)/dω, respectively.

Current noise spectra and mechanisms with dissipaton equation of motion theory.

Based on the Yan's dissipaton equation of motion (DEOM) theory [J. Chem. Phys.

Improving the efficiency of hierarchical equations of motion approach and application to coherent dynamics in Aharonov-Bohm interferometers.

Several recent advancements for the hierarchical equations of motion (HEOM) approach are reported. First, we propose an a priori estimate for the optimal number of basis functions for the reservoir memory decomposition. Second, we make use of the sparsity of auxiliary density operators (ADOs) and propose two ansatzs to screen out all the intrinsic zero ADO elements.

Derivation of exact master equation with stochastic description: dissipative harmonic oscillator.

A systematic procedure for deriving the master equation of a dissipative system is reported in the framework of stochastic description. For the Caldeira-Leggett model of the harmonic-oscillator bath, a detailed and elementary derivation of the bath-induced stochastic field is presented. The dynamics of the system is thereby fully described by a stochastic differential equation, and the desired master equation would be acquired with statistical averaging.