3,164 research outputs found
Optimal Entropy Compression and Purification in Quantum Bits
Global unitary transformations that optimally increase the bias of any mixed
computation qubit in a quantum system, represented by a diagonal density
matrix, towards a particular state of the computational basis which, in effect,
increases its purity are presented. Quantum circuits that achieve this by
implementing the above data compression technique, a generalization of the
3B-Comp [Fernandez, Lloyd, Mor, Roychowdhury (2004); arXiv: quant-ph/0401135]
used before, are described. These circuits enable purity increment in the
computation qubit by maximally transferring part of its von Neumann or Shannon
entropy to any number of surrounding qubits and are valid for the complete
range of initial biases. Using the optswaps, a practicable new method that
algorithmically achieves hierarchy-dependent cooling of qubits to their
respective limits in an engineered quantum register opened to the heat-bath is
delineated. In addition to multi-qubit purification and satisfying two of
DiVincenzo's criteria for quantum computation in some architectures, the
implications of this work for quantum data compression and quantum
thermodynamics are discussed.Comment: 26 pages, 12 + 1 (external) figures; v3: revised manuscrip
Reductive Biotransformation of Ethyl Acetoacetate: A Comparative Studies using Free and Immobilized Whole Yeast Cells
Bioreduction of ethyl acetoacetate with free and immobilized yeast whole cell was achieved by using water and sucrose combination. After detachment from immobilized beads under basic condition, the corresponding ethyl(S)-(+)-3-hydroxybutanoate was isolated with 98 to 100% yield. Immobilized beads of yeast whole cell were prepared at different temperature which affects the morphology and physiology of the beads for the diffusion of the enzyme, which shown the maximum conversion of the substrate to products as compared to the free yeast whole cell
“BE YOURSELF” (the Creation of a Music Composition)
An artistic workmanship is a creative work process of an artist in creating artworks. Artwork meant by the writer is "Be Yourself", which is related to the establishment of his self-characters that grown up in Sundanese culture. Life journey was a dynamic process and became the will of the Almighty. God's destiny and life journey made the writer as “urangsumando” (people related by marriage) in Minangkabau. Cross-cultural was a life journey to be (yourself) and the destiny he should do – being in two different culture positions. Such differences did not automatically make the writer soluble in integration – he existed in two conceptions. In the realization, how the concepts are able to deliver other offers which have contribution to the development of artistic creation. The discussion in this article is the artistic forms as the exploration, working material, and forms of performance
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