6,286 research outputs found
The Stage Through Slanted Eyes: An Examination of the Current State of Asian Americans in Theatre
Deep-set racial prejudices and stereotypes in American society greatly impact how Asian Americans are perceived onstage and in everyday life. The Stage Through Slanted Eyes: An Examination of the Current State of Asian Americans in Theatre delves into the history of these prejudices and looks at how a performer\u27s race can impact his or her theatrical career
Concatenated Quantum Codes
One of the main problems for the future of practical quantum computing is to
stabilize the computation against unwanted interactions with the environment
and imperfections in the applied operations. Existing proposals for quantum
memories and quantum channels require gates with asymptotically zero error to
store or transmit an input quantum state for arbitrarily long times or
distances with fixed error. In this report a method is given which has the
property that to store or transmit a qubit with maximum error
requires gates with error at most and storage or channel elements
with error at most , independent of how long we wish to store the
state or how far we wish to transmit it. The method relies on using
concatenated quantum codes with hierarchically implemented recovery operations.
The overhead of the method is polynomial in the time of storage or the distance
of the transmission. Rigorous and heuristic lower bounds for the constant
are given.Comment: 16 pages in PostScirpt, the paper is also avalaible at
http://qso.lanl.gov/qc
Decoherence Functional and Inhomogeneities in the Early Universe
We investigate the quantum to classical transition of small inhomogeneous
fluctuations in the early Universe using the decoherence functional of
Gell-Mann and Hartle. We study two types of coarse graining; one due to coarse
graining the value of the scalar field and the other due to summing over an
environment. We compare the results with a previous study using an environment
and the off-diagonal rule proposed by Zurek. We show that the two methods give
different results.Comment: 15 pages in plain te
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