Casaccino, A and Lloyd, S and Mancini, S and Severini, S (2009) QUANTUM STATE TRANSFER THROUGH A QUBIT NETWORK WITH ENERGY SHIFTS AND FLUCTUATIONS. INT J QUANTUM INF , 7 (8) 1417 - 1427. 10.1142/S0219749909006085.
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Abstract
We study quantum state transfer through a qubit network modeled by spins with XY interaction, when relying on a single excitation. We show that it is possible to achieve perfect transfer by shifting (adding) energy to specific vertices. This technique appears to be a potentially powerful tool for changing, and in some cases improving, the transfer capabilities of quantum networks. Analytical results are presented for all-to-all networks and for all-to-all networks with a missing link. Moreover, we evaluate the effect of random fluctuations on the transmission fidelity.
| Type: | Article |
|---|---|
| Title: | QUANTUM STATE TRANSFER THROUGH A QUBIT NETWORK WITH ENERGY SHIFTS AND FLUCTUATIONS |
| DOI: | 10.1142/S0219749909006085 |
| Keywords: | Spin networks, graph theory, quantum communication, COMMUNICATION, DYNAMICS |
| UCL classification: | UCL > School of BEAMS > Faculty of Engineering Science > Computer Science |
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