ITP OpenIR  > 理论物理所科研产出  > SCI论文
Long, GL; Yan, HY; Li, YS; Tu, CC; Zhu, SJ; Ruan, D; Sun, Y; Tao, JX; Chen, HM; Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.
Quantum mechanical nature in liquid NMR quantum computing
Source PublicationCOMMUNICATIONS IN THEORETICAL PHYSICS
KeywordNuclear-magnetic-resonance Search Algorithm Implementation Computation Ensemble Spectroscopy Realization States
AbstractThe quantum nature of bulk ensemble NAIR quantum computing - the center of recent heated debate, is addressed. Concepts of the mixed state and entanglement arc examined, and the data in a two-qubit liquid NAIR quantum computation are analyzed. The main points in this paper are: i) Density matrix describes the "state" of an average particle in an ensemble. It does not describe the state of an individual particle in an ensemble; ii) Entanglement is a property of the wave function of a microscopic particle (such as a molecule in a liquid NAIR sample), and separability of the density matrix cannot be used to measure the entanglement of mixed ensemble; iii) The state evolution in bulk-ensemble NAIR quantum computation is quantum-mechanical; iv) The coefficient before the effective pure state density matrix, c, is a measure of the simultaneity of the molecules in an ensemble. It reflects the intensity of the NAIR signal and has no significance in quantifying the entanglement in the bulk ensemble NAIR system. The decomposition of the density matrix into product states is only an indication that the ensemble can be prepared by an ensemble with the particles unentangled. We conclude that effective-pure-state NAIR quantum computation is genuine, not just classical simulations.
2002
ISSN0253-6102
Volume38Issue:3Pages:305-308
Subject AreaPhysics
Indexed BySCI
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13433
Collection理论物理所科研产出_SCI论文
Corresponding AuthorLong, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.
Recommended Citation
GB/T 7714
Long, GL,Yan, HY,Li, YS,et al. Quantum mechanical nature in liquid NMR quantum computing[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2002,38(3):305-308.
APA Long, GL.,Yan, HY.,Li, YS.,Tu, CC.,Zhu, SJ.,...&Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China..(2002).Quantum mechanical nature in liquid NMR quantum computing.COMMUNICATIONS IN THEORETICAL PHYSICS,38(3),305-308.
MLA Long, GL,et al."Quantum mechanical nature in liquid NMR quantum computing".COMMUNICATIONS IN THEORETICAL PHYSICS 38.3(2002):305-308.
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