scholarly journals Experimental study of quantum simulation for quantum chemistry with a nuclear magnetic resonance simulator

Author(s):  
Dawei Lu ◽  
Nanyang Xu ◽  
Boruo Xu ◽  
Zhaokai Li ◽  
Hongwei Chen ◽  
...  

Quantum computers have been proved to be able to mimic quantum systems efficiently in polynomial time. Quantum chemistry problems, such as static molecular energy calculations and dynamical chemical reaction simulations, become very intractable on classical computers with scaling up of the system. Therefore, quantum simulation is a feasible and effective approach to tackle quantum chemistry problems. Proof-of-principle experiments have been implemented on the calculation of the hydrogen molecular energies and one-dimensional chemical isomerization reaction dynamics using nuclear magnetic resonance systems. We conclude that quantum simulation will surpass classical computers for quantum chemistry in the near future.

1998 ◽  
Vol 538 ◽  
Author(s):  
Ying Dai ◽  
Xin-Min Min ◽  
Ce-Wen Nan ◽  
Xin-Mei Pei ◽  
Hai-Lan Ren

AbstractAluminum oxynitride (AlON) is a nitrogen-stabilized defective spinel phase of alumina (y-Al2O3). Its structure has not been well understood so far. Solid-state27 Al magic-angle spinning nuclear magnetic resonance and quantum chemistry calculation are used to characterize y-Al2O3 and AMON ceramics in the present study. The resonance spectra clearly show different units (e.g. [AlN4], [AlO4] and [AlO6]) and vary with composition. The calculation shows that the vacancy located at octahedral site is more stable than that located at the tetrahedral site, and nitrogen atoms preferentially replace oxygen atoms in the tetrahedral site, which is in agreement with the experimental analysis by nuclear magnetic resonance.


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