Research on the Current Situation, Prospects and Countermeasures of Digital RMB

In the economic environment of global economic recession, weak consumption and weakened momentum of economic recovery, due to the impact of the prolonged epidemic, the global economy has become more polarized, and the development of China’s digital RMB has also fallen into difficulties, and the complex international environment has led to China’s economic development is relatively unstable; however, because the world is entering the era of informationization, the development of the digital RMB is imminent. Combined with the background of economic recovery in the post epidemic era, this paper analyzes and summarizes the current situation of digital RMB at this stage, studies the existing deficiencies of digital RMB, and ultimately puts forward four relevant countermeasures and targeted recommendations to promote the development of digital RMB, which mainly include strengthening the internationalization of RMB, continuing to make efforts to reduce the difficulties in payment, improving the relevant technology, and strengthening the measures of market supervision

Quantifying immediate price impact of trades based on the kk-shell decomposition of stock trading networks

Traders in a stock market exchange stock shares and form a stock trading network. Trades at different positions of the stock trading network may contain different information. We construct stock trading networks based on the limit order book data and classify traders into $k$ classes using the $k$-shell decomposition method. We investigate the influences of trading behaviors on the price impact by comparing a closed national market (A-shares) with an international market (B-shares), individuals and institutions, partially filled and filled trades, buyer-initiated and seller-initiated trades, and trades at different positions of a trading network. Institutional traders professionally use some trading strategies to reduce the price impact and individuals at the same positions in the trading network have a higher price impact than institutions. We also find that trades in the core have higher price impacts than those in the peripheral shell.Comment: 6 pages including 3 figures and 1 tabl

Vortex-Antivortex Lattices in a Holographic Superconductor

We employ the Einstein-Abelian-Higgs theory to investigate the structure of vortex-antivortex lattices within a superconductor driven by spatial periodic magnetic fields. By adjusting the parameters of the external magnetic field, including the period ($\mathcal{T}$) and the amplitude ($B_0$), various distinct vortex states emerge. These states encompass the Wigner crystallization state, the vortex cluster state, and the suppressed state. Additionally, we present a comprehensive phase diagram to demarcate the specific regions where these structures emerge, contributing to our understanding of superconductivity in complex magnetic environments