نتایج جستجو برای: mixed state
تعداد نتایج: 1060928 فیلتر نتایج به سال:
The geometric measure of quantum entanglement of a pure state, defined by its distance to the set of pure separable states, is extended to multipartite mixed states. We characterize the nearest disentangled mixed state to a given mixed state with respect to the geometric measure by means of a system of equations. The entanglement eigenvalue for a mixed state is introduced. And we show that, for...
When dealing with multivariate time series an important question one may ask is whether the measured signals are independent or not. Any interrelation can, for example, provide information about the underlying physical mechanisms or may be used to exploit possible redundancy in order to reduce the number of measurement channels. In linear systems theory the standard tool for detecting dependenc...
We present theory and experiment for the task of discriminating two nonorthogonal states, given multiple copies. We implement several local measurement schemes, on both pure states and states mixed by depolarizing noise. We find that schemes which are optimal (or have optimal scaling) without noise perform worse with noise than simply repeating the optimal single-copy measurement. Applying opti...
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