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DC Field | Value | Language |
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dc.contributor.author | Lorenzo, Salvatore | - |
dc.contributor.author | Apollaro, Tony John George | - |
dc.contributor.author | Paganelli, Simone | - |
dc.contributor.author | Palma, G. Massimo | - |
dc.contributor.author | Plastina, Francesco | - |
dc.date.accessioned | 2022-08-09T07:18:23Z | - |
dc.date.available | 2022-08-09T07:18:23Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Lorenzo, S., Apollaro, T. J. G., Paganelli, S., Palma, G. M., & Plastina, F. (2015). Transfer of arbitrary two-qubit states via a spin chain. Physical Review A, 91(4), 042321. | en_GB |
dc.identifier.uri | https://www.um.edu.mt/library/oar/handle/123456789/100433 | - |
dc.description.abstract | We investigate the fidelity of the quantum state transfer (QST) of two qubits by means of an arbitrary spin- 1 2 network, on a lattice of any dimensionality. Under the assumptions that the network Hamiltonian preserves the magnetization and that a fully polarized initial state is taken for the lattice, we obtain a general formula for the average fidelity of the two qubits QST, linking it to the one- and two-particle transfer amplitudes of the spin excitations among the sites of the lattice. We then apply this formalism to a 1D spin chain with XX-Heisenberg type nearest-neighbour interactions adopting a protocol that is a generalization of the single qubit one proposed in Paganelli et al. [Phys. Rev. A 87, 062309 (2013)]. We find that a high-quality two qubit QST can be achieved provided one can control the local fields at sites near the sender and receiver. Under such conditions, we obtain an almost perfect transfer in a time that scales either linearly or, depending on the spin number, quadratically with the length of the chain. | en_GB |
dc.language.iso | en | en_GB |
dc.publisher | American Physical Society | en_GB |
dc.rights | info:eu-repo/semantics/restrictedAccess | en_GB |
dc.subject | Quantum systems | en_GB |
dc.subject | Hamiltonian operator | en_GB |
dc.subject | Spintronics | en_GB |
dc.subject | Quantum computing | en_GB |
dc.title | Transfer of arbitrary two-qubit states via a spin chain | en_GB |
dc.type | article | en_GB |
dc.rights.holder | The copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder. | en_GB |
dc.description.reviewed | peer-reviewed | en_GB |
dc.identifier.doi | 10.1103/PhysRevA.91.042321 | - |
dc.publication.title | Physical Review A | en_GB |
Appears in Collections: | Scholarly Works - FacSciPhy |
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