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Short-distance quantum state transfer through spin chains Nguyen Ba An Institute of Physics Abstract Transferring quantum information encoded in quantum states of spins from one system to another is necessary in quantum information processing and quantum distributed computing. When the systems are far apart, photons can serve as the most suitable carriers of quantum information. This, however, has difficulties in the interfacing problem, i.e., the problem of mapping quantum information of spins to photons and vice versa. When the systems are close to each other, quantum state transfer can be done through spin chains that directly connect the systems, without resorting to photons. Here we present several methods for quantum state transfer through spin chains, exploiting (i) a sequence of in-time swapping gates, (ii) natural evolution and (iii) appropriately designed measurement-based strategies. References 1. Z. X. Man, N. B. An, Y. J. Xia and J. Kim, Phys. Lett. A 378, 2063 (2014): “Controllable entanglement transfer via two parallel spin chains” 2. Z. X. Man, N. B. An and Y. J. Xia, Ann. Phys. 349, 209 (2014): “Improved quantum state transfer via quantum partially collapsing measurements” 3. Z. X. Man, N. B. An, Y. J. Xia and J. Kim, Ann. Phys. 351, 739 (2014): “Universal scheme for finite-probability perfect transfer of arbitrary multispin states through spin chains”