862 research outputs found
BattRAE: Bidimensional Attention-Based Recursive Autoencoders for Learning Bilingual Phrase Embeddings
In this paper, we propose a bidimensional attention based recursive
autoencoder (BattRAE) to integrate clues and sourcetarget interactions at
multiple levels of granularity into bilingual phrase representations. We employ
recursive autoencoders to generate tree structures of phrases with embeddings
at different levels of granularity (e.g., words, sub-phrases and phrases). Over
these embeddings on the source and target side, we introduce a bidimensional
attention network to learn their interactions encoded in a bidimensional
attention matrix, from which we extract two soft attention weight distributions
simultaneously. These weight distributions enable BattRAE to generate
compositive phrase representations via convolution. Based on the learned phrase
representations, we further use a bilinear neural model, trained via a
max-margin method, to measure bilingual semantic similarity. To evaluate the
effectiveness of BattRAE, we incorporate this semantic similarity as an
additional feature into a state-of-the-art SMT system. Extensive experiments on
NIST Chinese-English test sets show that our model achieves a substantial
improvement of up to 1.63 BLEU points on average over the baseline.Comment: 7 pages, accepted by AAAI 201
Nuclear-nuclear interaction mediated by a mechanically controlled nitrogen-vacancy-center spin in diamond
We propose a scheme to achieve nuclear-nuclear indirect interactions mediated
by a mechanically driven nitrogen-vacancy (NV) center in diamond. Here we
demonstrate two-qubit entangling gates and quantum-state transfer between two
carbon nuclei in diamond. In such a system, the NV center interacts with a
nearby nuclear spin via a dipole-dipole interaction. Under the quantum Zeno
condition, the scheme is robust against decoherence caused by coupling between
the NV center (nuclear spins) and the environment. Conveniently, precise
control of dipole coupling is not required so this scheme is insensitive to
fluctuating positions of the nuclear spins and the NV center. Our scheme
provides a general blueprint for multi-nuclear-spin gates and for multi-party
communication in a polygon geometry with each vertex occupied by a nuclear
spin.Comment: 11 pages, 8 figure
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