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Peierls distorted chain as a quantum data bus for quantum state transfer
- Publication Year :
- 2006
-
Abstract
- We systematically study the transfer of quantum state of electron spin as the flying qubit along a half-filled Peierls distorted tight-binding chain described by the Su-Schrieffer-Heeger (SSH) model, which behaves as a quantum data bus. This enables a novel physical mechanism for quantum communication with always-on interaction: the effective hopping of the spin carrier between sites $A$ and $B$ connected to two sites in this SSH chain can be induced by the quasi-excitations of the SSH model. As we prove, it is the Peierls energy gap of the SSH quasi-excitations that plays a crucial role to protect the robustness of the quantum state transfer process. Moreover, our observation also indicates that such a scheme can also be employed to explore the intrinsic property of the quantum system.<br />10 pages, 6 figures
- Subjects :
- Physics
Quantum Physics
Statistical Mechanics (cond-mat.stat-mech)
Condensed Matter - Mesoscale and Nanoscale Physics
Band gap
FOS: Physical sciences
General Physics and Astronomy
Chain (algebraic topology)
Quantum state
Quantum mechanics
Qubit
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Quantum system
Condensed Matter::Strongly Correlated Electrons
Quantum Physics (quant-ph)
Spin (physics)
Quantum information science
Quantum
Condensed Matter - Statistical Mechanics
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....1779d18a8eac39a893ca599ccdacbfc6