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RESEARCH PRODUCT
Many-qubit quantum state transfer via spin chains
Simone PaganelliTony J. G. ApollaroSalvatore LorenzoFrancesco PlastinaA. SindonaGian Luca Giorgisubject
PhysicsQuantum PhysicsAngular momentumFOS: Physical sciencesQuantum channelState (functional analysis)quantum state transferCondensed Matter PhysicsAtomic and Molecular Physics and OpticsMagnetic fieldPhysics and Astronomy (all)quantum spin chainmany-body systemquantum informationQuantum stateQuantum mechanicsQubitQuantum informationmany-body systems; quantum information; quantum spin chain; quantum state transfer; Physics and Astronomy (all)Quantum Physics (quant-ph)many-body systemsMathematical PhysicsSpin-½description
The transfer of an unknown quantum state, from a sender to a receiver, is one of the main requirements to perform quantum information processing tasks. In this respect, the state transfer of a single qubit by means of spin chains has been widely discussed, and many protocols aiming at performing this task have been proposed. Nevertheless, the state transfer of more than one qubit has not been properly addressed so far. In this paper, we present a modified version of a recently proposed quantum state transfer protocol [Phys. Rev. A 87, 062309 (2013)] to obtain a quantum channel for the transfer of two qubits. This goal is achieved by exploiting Rabi-like oscillations due to excitations induced by means of strong and localized magnetic fields. We derive exact analytical formulae for the fidelity of the quantum state transfer, and obtain a high-quality transfer for general quantum states as well as for specific classes of states relevant for quantum information processing.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-01-01 | Physica Scripta |