Quantum correlation and classical correlation dynamics in the spin-boson model

We study the quantum correlation and classical correlation dynamics in a spin-boson model. For two different forms of spectral density, we obtain analytical results and show that the evolutions of both correlations depend closely on the form of the initial state. At the end of evolution, all correlations initially stored in the spin system transfer to reservoirs. It is found that for a large family of initial states, quantum correlation remains equal to the classical correlation during the course of evolution. In addition, there is no increase in the correlations during the course of evolution.Comment: 10 pages, 5 figure

Entrepreneur narcissism and unethical pro-organizational behaviour: an examination of mediated-moderation model

Drawing on research taking narcissism as a ‘dark’ side of personality traits, we examine how and when narcissistic entrepreneurs are more likely to engage in unethical pro-organizational behaviours (UPBs). We collected data from 347 entrepreneurial teams in three entrepreneurial parks of China. The results show that entrepreneur narcissism is positively related to entrepreneurial goal difficulty and UPBs, and entrepreneurial goal difficulty mediates the relationship between entrepreneur narcissism and UPBs; and these positive associations are stronger when external environment is more complex. Theoretical and practical implications as well as research limitation of this study are also discussed

Identifying the Riemann zeros by periodically driving a single qubit

The Riemann hypothesis, one of the most important open problems in pure mathematics, implies the most profound secret of prime numbers. One of the most interesting approaches to solve this hypothesis is to connect the problem with the spectrum of the physical Hamiltonian of a quantum system. However, none of the proposed quantum Hamiltonians have been experimentally feasible.Here, we report the first experiment to identify the first non-trivial zeros of the Riemann zeta function and the first two zeros of P\'olya's fake zeta function, using a novel Floquet method, through properly designed periodically driving functions. According to this method, the zeros of these functions are characterized by the occurrence of crossings of quasi-energies when the dynamics of the system are frozen. The experimentally obtained zeros are in excellent agreement with their exact values. Our study provides the first experimental realization of the Riemann zeros, which may provide new insights into this fundamental mathematical problem.Comment: 5 pages, 7 figure