Entangling a series of trapped ions by moving cavity bus

Entangling multiple qubits is one of the central tasks for quantum information processings. Here, we propose an approach to entangle a number of cold ions (individually trapped in a string of microtraps) by a moved cavity. The cavity is pushed to include the ions one by one with an uniform velocity, and thus the information stored in former ions could be transferred to the latter ones by such a moving cavity bus. Since the positions of the trapped ions are precisely located, the strengths and durations of the ion-cavity interactions can be exactly controlled. As a consequence, by properly setting the relevant parameters typical multi-ion entangled states, e.g., $W$ state for 10 ions, could be deterministically generated. The feasibility of the proposal is also discussed.Comment: 8 pages, 2 figures, 1 tabl

Characterization and mechanisms of lipid metabolism in high-fat diet induced hyperlipidemia in Mongolian gerbil (Meriones unguiculatus)

Rodent are common animal models for hyperlipidemia. In the present study, the differences in lipid  metabolism between gerbils and rats were investigated. Feeding a high-fat diet led to a significant increase in serum total cholesterol (TC), triglyceride (TG), low density lipoprotein cholesterol (LDLC) and high-density  lipoprotein cholesterol (HDLC) in gerbils, and were found in a time-dependent manner during 0 to 16 weeks’  feeding. Hepatic lipid vacuolization and even fibrosis in gerbils were greatly formed in response to the high fat diet with the characteristic of serum LDLC increase, while those remained lower changed or unchanged in  rats. Furthermore, serum lecithin cholesterol acyl transferase (LCAT) activities in the hyperlipidemia gerbils were significantly higher than those in the normal ones, which were also in line with increased LDLC-TG  secretion rate and impaired hepatic function in gerbils in response to the high-fat diet. Therefore, gerbils were considered to be more sensitive to high fat diet, less time-consuming in forming hyperlipidemia. Similar response in increased LDLC levels to cholesterol as human and may warrant further application as a possible model for drug evaluation and lipid metabolism.Key words: Mongolian gerbil, hypercholesterolemia, low-density lipoprotein cholesterol, lecithin cholesterol acyl transferase