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Volumn 80, Issue 5, 2009, Pages

NMR multiple quantum coherences in quasi-one-dimensional spin systems: Comparison with ideal spin-chain dynamics

Author keywords

[No Author keywords available]

Indexed keywords

ANALYTICAL METHOD; CHAIN COUPLING; CHAIN DYNAMICS; DOUBLE-QUANTUM; FLUORAPATITES; MULTIPLE-QUANTUM COHERENCES; MULTIPULSE CONTROL; NEAREST-NEIGHBOR COUPLING; QUANTUM WIRES; QUASI-ONE-DIMENSIONAL; SOLID-STATE NUCLEAR MAGNETIC RESONANCE; SPIN SYSTEMS;

EID: 70450015289     PISSN: 10502947     EISSN: 10941622     Source Type: Journal    
DOI: 10.1103/PhysRevA.80.052323     Document Type: Article
Times cited : (50)

References (62)
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    • The relevant 16-pulse sequence S may be understood starting from a simpler two-pulse cycle C which also simulates the DQ Hamiltonian along with its time-reversed version C̄. The primitive pulse cycle C= [Δ 2 X Δ′ X Δ 2], where Δ′ =2Δ+w, Δ, w being the pulse delay and the pulse width, respectively. Then S=C□ C̄ □ C̄ □C□ C̄ □C□C□ C̄, with a cycle time Tc =8×3 (Δ+w) and H̄ (0) = HDQ.
    • The relevant 16-pulse sequence S may be understood starting from a simpler two-pulse cycle C which also simulates the DQ Hamiltonian along with its time-reversed version C̄. The primitive pulse cycle C= [Δ 2 X Δ′ X Δ 2], where Δ′ =2Δ+w, Δ, w being the pulse delay and the pulse width, respectively. Then S=C□ C̄ □ C̄ □C□ C̄ □C□C□ C̄, with a cycle time Tc =8×3 (Δ+w) and H̄ (0) = HDQ.
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    • As it turns out, the peak at the mirror time is no longer the second largest for the thermal state in the presence of cross-chain coupling, whereas it is still such for the end-polarized state.
    • As it turns out, the peak at the mirror time is no longer the second largest for the thermal state in the presence of cross-chain coupling, whereas it is still such for the end-polarized state.
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    • It is worth noting that in some situations, the freedom of choice for the bath model can be formalized precisely: for instance, in the case of bosonic degrees of freedom, all baths possessing the same temperature and spectral density have, independently of any other detail, an equivalent effect on the central system (see, e.g.,). In the case of spin baths, as far as we know, such a degree of rigor has not yet been achieved.
    • It is worth noting that in some situations, the freedom of choice for the bath model can be formalized precisely: for instance, in the case of bosonic degrees of freedom, all baths possessing the same temperature and spectral density have, independently of any other detail, an equivalent effect on the central system (see, e.g.,). In the case of spin baths, as far as we know, such a degree of rigor has not yet been achieved.
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    • A complete simulation for a fixed realization takes about 1 week on a 64-node cluster.
    • A complete simulation for a fixed realization takes about 1 week on a 64-node cluster.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.