Teleportation of Entangled States through Divorce of Entangled Pair Mediated by a Weak Coherent Field in a High-Q Cavity

We propose a scheme to partially teleport an unknown entangled atomic state. A high-Q cavity, supporting one mode of a weak coherent state, is needed to accomplish this process. By partial teleportation we mean that teleportation will occur by changing one of the partners of the entangled state to be teleported. The entangled state to be teleported is composed by one pair of particles, we called this surprising characteristic of maintaining the entanglement, even when one of the particle of the entangled pair being teleported is changed, of divorce of entangled states.

高压条件下块体碳纳米管的制备(英文)

分别以高纯碳纳米管(MWCNTs)、未纯化MWCNTs和盐酸纯化MWCNTs为原料,铅(Pb)和石墨(Gr)为压力传递媒介,在4GPa和7.7GPa高压和室温条件下制备块体碳纳米管。其直径约为6nm,呈圆柱形块体。采用拉曼光谱仪、X-射线衍射仪、氮吸附仪和透射电镜表征样品。结果表明,含有MgO催化剂杂质的未纯化MWCNTs,以Pb为媒介时,在7.7GPa下可获得最佳压缩样品。高压可引起MWCNTs压缩和剪切应力。Pb容器作为准静压传递媒介可提供更多压缩应力,同时杂质能作为黏结剂,从而有利于得到致密化度较高的MWCNTs。

On Husimi Distribution for Systems with Continuous Spectrum

We propose a procedure to generalize the Husimi distribution to systems with continuous spectrum. We start examining a pioneering work, by Gazeau and Klauder, where the concept of coherent states for systems with discrete spectrum was extended to systems with continuous one. In the present article, we see the Husimi distribution as a representation of the density operator in terms of a basis of coherent states. There are other ways to obtain it, but we do not consider here. We specially discuss the problem of the continuous harmonic oscillator.

A single synonymous mutation determines the phosphorylation and stability of the nascent protein

p53 is an intrinsically disordered protein with a large number of post-translational modifications and interacting partners.The hierarchical order and subcellular location of these events are still poorly understood.The activation of p53 during the DNA damage response(DDR)requires a switch in the activity of the E3 ubiquitin ligase MDM2 from a negative to a positive regulator of p53.This is mediated by the ATM kinase that regulates the binding of MDM2 to the p53 mRNA facilitating an increase in p53 synthesis.Here we show that the binding of MDM2 to the p53 mRNA brings ATM to the p53 polysome where it phosphorylates the nascent p53 at serine 15 and prevents MDM2-mediated degradation of p53.A single synonymous mutation in p53 codon 22(L22L)prevents the phosphorylation of the nascent p53 protein and the stabilization of p53 following genotoxic stress.The ATM trafficking from the nucleus to the p53 polysome is mediated by MDM2,which requires its interaction with the ribosomal proteins RPL5 and RPL11.These results show how the ATM kinase phosphorylates the p53 protein while it is bang synthesized and offer a novel mechanism whereby a single synonymous mutation controls the stability and activity of the encoded protein.

A Derivation of the Entropy-Based Relativistic Smoothed Particle Hydrodynamics by Variational Principle

In this work, a second order smoothed particle hydrodynamics is derived for the study of relativistic heavy ion collisions. The hydrodynamical equation of motion is formulated in terms of the variational principle. In order to describe the fluid of high energy density but of low baryon density, the entropy is taken as the base quantity for the interpolation. The smoothed particle hydrodynamics algorithm employed in this study is of the second order, which guarantees better particle consistency. Furthermore, it is shown that the variational principle preserves the translational invariance of the system, and therefore improves the accuracy of the method. A brief discussion on the potential implications of the model in heavy ion physics as well as in general relativity are also presented.

Statistical Properties of a System Consisting of a Superconducting Qubit Coupled to an Optical Field Inside a Transmission Line

The present work investigates the entropy and the excitation inversion of a coupled system that consists of a qubit represented by a Cooper pair box （CPB） interacting with a transmission line working as a circuit quantum eleetrodynamics （CQED）. The proposed scheme uses the Buck-Sukumar model with a time dependent frequency in the presence of losses to study the evolution of the entropy and the excitation inversion of the system. We have shown that the CQED is much more sensitive to the presence of losses than the CPB. The results also show that it is possible to monitor properties of the subsystems through appropriate choices of the time-dependent parameters.

A New Treatment for Some Periodic SchrSdinger Operators I:The Eigenvalue

We study the problem of how the Floquet property manifests for periodic Schr6dinger operators,which axe known to have multiple of asymptotic spectral solutions.The main conclusions are made for elliptic potentials,we demonstrate that for each period of the elliptic function there is a relation about the Floquet exponent and the monodromy of wave function.Among them there are two relations not explained by the classical Floquet theory.These relations produce both old and new asymptotic solutions consistent with results already known.

Phase transitions in four-dimensional AdS black holes with a nonlinear electrodynamics source

In this work we consider black hole solutions to Einstein’s theory coupled to a nonlinear powerlaw electromagnetic field with a fixed exponent value.We study the extended phase space thermodynamics in canonical and grand canonical ensembles,where the varying cosmological constant plays the role of an effective thermodynamic pressure.We examine thermodynamical phase transitions in such black holes and find that both first-and second-order phase transitions can occur in the canonical ensemble while,for the grand canonical ensemble,Hawking-Page and second-order phase transitions are allowed.