There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

Part I. Fundamental Concepts: 1. Introduction and overview 2. Introduction to quantum mechanics 3. Introduction to computer science Part II. Quantum Computation: 4. Quantum circuits 5. The quantum Fourier transform and its application 6. Quantum search algorithms 7. Quantum computers: physical realization Part III. Quantum Information: 8. Quantum noise and quantum operations 9. Distance measures for quantum information 10. Quantum error-correction 11. Entropy and information 12. Quantum information theory Appendices References Index.

Quantum Computation and Quantum Information

抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。

疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A

Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

Living in an oxygenated environment has required the evolution of effective cellular strategies to detect and detoxify metabolites of molecular oxygen known as reactive oxygen species. Here we review evidence that the appropriate and inappropriate production of oxidants, together with the ability of organisms to respond to oxidative stress, is intricately connected to ageing and life span.

Oxidants, oxidative stress and the biology of ageing.

01 12 13 1 v 4 2 5 A pr 2 00 2 Entanglement cost of mixed states

The preparation and coherent manipulation of N-atom entangled states is fundamental to realizing a quantum computer [1], is the basis of tests of quantum mechanics vs. local realists’ theories [2], and promises a novel atomic spectroscopy with resolution better than the standard quantum limit [3]. In a quantum computer (QC), information is stored in a quantum register composed of N two-level systems representing the quantum bits (qubits), and the general state of the QC is an (entangled) linear superposition of their states. QCs can perform certain classes of computations exponentially faster than any classical machine [1, 4]. Such a device should be able to perform arbitrary unitary operations on the quantum register, which can be decomposed into a sequence of steps involving the conditional dynamics of a few qubits (quantum gates) [1].

Synthesis of Entangled Atomic States and Quantum Computation

W. Dür, G. Vidal, J. I. Cirac, N. Linden and S. Popescu Institut für Theoretische Physik, Universität Innsbruck,A-6020 Innsbruck, Austria Department of Mathematics, University of Bristol, University Walk, Bristol BS8 1TW, UK H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, UK BRIMS, Hewlett-Packard Laboratories, Stoke Gifford, Bristol BS12 6QZ, UK (March 31, 2022)

00 06 03 4 v 4 1 2 Se p 20 01 Entanglement capabilities of non – local Hamiltonians

http://link.springer.com/content/pdf/10.1007/978-3-642-76373-1_13.pdf

Trapping in Some Model Hamiltonians

W e propose a schem e to observe typicalstrongly correlated ferm ionic phenom ena with bosonic atom s in opticallattices. For di erent values ofthe sign and strength ofthe scattering lengths it is possible to reach a "superconducting" regim e,where the system exhibits atom ic pairing,or a Luttinger liquid behavior. W e identify the range ofparam eters where these phenom ena appear, illustrateourpredictionswith num ericalcalculations,and show how todetectthepresenceofpairing.

0 20 70 40 v 1 1 J ul 2 00 2 From C ooper pairs to Luttinger liquids w ith bosonic atom s in opticallattices

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