3,958 research outputs found
Non-Threshold Quantum Secret Sharing Schemes in the Graph State Formalism
In a recent work, Markham and Sanders have proposed a framework to study
quantum secret sharing (QSS) schemes using graph states. This framework unified
three classes of QSS protocols, namely, sharing classical secrets over private
and public channels, and sharing quantum secrets. However, most work on secret
sharing based on graph states focused on threshold schemes. In this paper, we
focus on general access structures. We show how to realize a large class of
arbitrary access structures using the graph state formalism. We show an
equivalence between binary quantum codes and graph state secret
sharing schemes sharing one bit. We also establish a similar (but restricted)
equivalence between a class of Calderbank-Shor-Steane (CSS) codes and
graph state QSS schemes sharing one qubit. With these results we are able to
construct a large class of quantum secret sharing schemes with arbitrary access
structures.Comment: LaTeX, 6 page
A rapid and convergent synthesis of the integrastatin core
The tetracyclic core of the integrastatin natural products has
been prepared in a convergent and rapidmanner. Our strategy
relies upon a palladium(II)-catalyzed oxidative cyclization to
form the central [3.3.1]-dioxabicycle of the natural product
core. Overall, the core has been completed in only 4 linear
steps from known compounds
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Marketing and Data Science: Together the Future is Ours
The synergistic use of computer science and marketing science techniques offers the best avenue for knowledge development and improved applications. A broad area of complementarity between the typical focus in statistics and computer science and that in marketing offers great potential. The former fields tend to focus on pattern recognition, control and prediction. Many marketing analyses embrace these directions, but also contribute by modeling structure and exploring causal relationships. Marketing has successfully combined foci from management science with foci from psychology and economics. These fields complement each other because they enable a broad spectrum of scientific approaches. Combined, they provide both understanding and practical solutions to important and relevant managerial marketing problems, and marketing science is already very successful at obtaining unique insights from big data
On certain new integrable second order nonlinear differential equations and their connection with two dimensional Lotka-Volterra system
In this paper, we consider a second order nonlinear ordinary differential
equation of the form
,
where 's, are arbitrary parameters. By using the modified
Prelle-Singer procedure, we identify five new integrable cases in this equation
besides two known integrable cases, namely (i) and (ii) . Among these five, four equations admit time dependent first
integrals and the remaining one admits time independent first integral. From
the time independent first integral, nonstandard Hamiltonian structure is
deduced thereby proving the Liouville sense of integrability. In the case of
time dependent integrals, we either explicitly integrate the system or
transform to a time-independent case and deduce the underlying Hamiltonian
structure. We also demonstrate that the above second order ordinary
differential equation is intimately related to the two-dimensional
Lotka-Volterra (LV) system. From the integrable parameters of above nonlinear
equation and all the known integrable cases of the latter can be deduced
thereby.Comment: Accepted for publication in J. Math. Phy
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