6533b7cffe1ef96bd1258410

RESEARCH PRODUCT

Quantum-state transfer via resonant tunneling through local-field-induced barriers

Tony J. G. ApollaroSalvatore LorenzoFrancesco PlastinaA. Sindona

subject

DYNAMICSDISORDERPhysicsDOTSQuantum PhysicsENTANGLEMENT; CHAINS; PROPAGATION; DYNAMICS; DISORDER; QUBITS; DOTSCondensed matter physicsSpinsFOS: Physical sciencesPROPAGATIONSettore FIS/03 - Fisica Della MateriaAtomic and Molecular Physics and OpticsQUBITSMagnetic fieldCondensed Matter - Other Condensed MatterQuality (physics)Chain (algebraic topology)QubitCHAINSQuantum Physics (quant-ph)Quantum information scienceENTANGLEMENTLocal fieldQuantum tunnellingOther Condensed Matter (cond-mat.other)

description

Efficient quantum-state transfer is achieved in a uniformly coupled spin-1/2 chain, with open boundaries, by application of local magnetic fields on the second and last-but-one spins, respectively. These effective barriers induce the appearance of two eigenstates, bilocalized at the edges of the chain, which allow a high-quality transfer also at relatively long distances. The same mechanism may be used to send an entire e-bit (e.g., an entangled qubit pair) from one to the other end of the chain. DOI: 10.1103/PhysRevA.87.042313

yearjournalcountryeditionlanguage
2013-01-01Physical Review A
https://doi.org/10.1103/physreva.87.042313