NMR quantum computing - lessons for the future

2001 ◽  
Vol 1 (Special) ◽  
pp. 134-142
Author(s):  
L. Vandersypen ◽  
I. Chuang
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Quantum Computing ◽  
Magnetic Resonance ◽  
Large Scale ◽  
Experimental Methods ◽  
Quantum Systems ◽  
Quantum Computers ◽  
Physical Systems ◽  
The Future ◽  
Nuclear Magnetic

Future physical implementations of large-scale quantum computers will face significant practical challenges. Many useful lessons can be drawn from present results with Nuclear Magnetic Resonance realizations of controllable two, three, five, and seven qubit quantum systems. We summarize various experimental methods and theoretical procedures learned in this work which will be of considerable value in building and testing quantum processors with a wide variety of physical systems.

NMR quantum information processing and entanglement

2002 ◽  
Vol 2 (2) ◽  
pp. 166-176
Author(s):  
R. Laflamme ◽  
D. Cory ◽  
C. Negrevergne ◽  
L. Viola
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Information Processing ◽  
Quantum Information ◽  
Magnetic Resonance ◽  
Liquid State ◽  
Quantum Information Processing ◽  
Quantum Computers ◽  
The Future ◽  
Nuclear Magnetic

In this essay we discuss the issue of quantum information and recent nuclear magnetic resonance (NMR) experiments. We explain why these experiments should be regarded as quantum information processing (QIP) despite the fact that, in present liquid state NMR experiments, no entanglement is found. We comment on how these experiments contribute to the future of QIP and include a brief discussion on the origin of the power of quantum computers.

scholarly journals One-Pot Synthesis of 7, 7-Dimethyl-4-Phenyl-2-Thioxo-2,3,4,6,7, 8-Hexahydro-1H-Quinazoline-5-OnesUsing Zinc Ferrite Nanocatalyst and Its Bio Evaluation

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 431
Author(s):  
Tentu Nageswara Rao ◽  
Nalla Krishnarao ◽  
Faheem Ahmed ◽  
Suliman Yousef Alomar ◽  
Fadwa Albalawi ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Zinc Ferrite ◽  
Large Scale ◽  
Cyano Group ◽  
Proton Nuclear Magnetic Resonance ◽  
Scale Production ◽  
One Pot ◽  
Antibacterial And Antifungal ◽  
Nuclear Magnetic

A simple and highly efficient protocol for the synthesis of derivatives 7, 7-dimethyl-4-phenyl-2-thioxo-2, 3, 4, 6, 7, 8-hexahydro-1H-quinazoline-5-one from 5, 5-dimethyl cyclohexane-1, 3-dione (4a–4h) (dimedone) has been described. The aryl aldehydes were substituted with thiourea in the presence of synthesized zinc ferrite nanocatalyst, which increased the yield under reflux through condensation, followed by cyclization to give desired products. The other advantages are that it is eco-friendly and economically affordable for large-scale production. Structural validation and characterization of all the newly synthesized compounds were evaluated by spectral analysis (mass spectrometry, proton nuclear magnetic resonance (1HNMR), and Carbon-13 nuclear magnetic resonance(13CNMR)spectroscopies. The structure of antibacterial and antifungal assays was performed with the newly synthesized compounds. The antimicrobial activity of title compounds possessing electron-withdrawing groups such as (4e–4h) (Cl, Br, and cyano group) exhibited more active potential than the electron-donating groups, C6H5,4-C6H4, 3-OC2H5-4OH-C6H3, etc., (4a–4d) containing moiety.

scholarly journals A New Hybrid Inversion Method for 2D Nuclear Magnetic Resonance Combining TSVD and Tikhonov Regularization

2021 ◽  
Vol 7 (2) ◽  
pp. 18
Author(s):  
Germana Landi ◽  
Fabiana Zama ◽  
Villiam Bortolotti
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Tikhonov Regularization ◽  
Large Scale ◽  
Regularization Parameter ◽  
High Sensitivity ◽  
Inversion Method ◽  
Nmr Relaxometry ◽  
Value Decomposition ◽  
Nuclear Magnetic

This paper is concerned with the reconstruction of relaxation time distributions in Nuclear Magnetic Resonance (NMR) relaxometry. This is a large-scale and ill-posed inverse problem with many potential applications in biology, medicine, chemistry, and other disciplines. However, the large amount of data and the consequently long inversion times, together with the high sensitivity of the solution to the value of the regularization parameter, still represent a major issue in the applicability of the NMR relaxometry. We present a method for two-dimensional data inversion (2DNMR) which combines Truncated Singular Value Decomposition and Tikhonov regularization in order to accelerate the inversion time and to reduce the sensitivity to the value of the regularization parameter. The Discrete Picard condition is used to jointly select the SVD truncation and Tikhonov regularization parameters. We evaluate the performance of the proposed method on both simulated and real NMR measurements.

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

2012 ◽  
Vol 370 (1976) ◽  
pp. 4734-4747 ◽  
Author(s):  
Dawei Lu ◽  
Nanyang Xu ◽  
Boruo Xu ◽  
Zhaokai Li ◽  
Hongwei Chen ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Quantum Chemistry ◽  
Quantum Simulation ◽  
Isomerization Reaction ◽  
Quantum Computers ◽  
One Dimensional ◽  
Time Quantum ◽  
Near Future ◽  
Nuclear Magnetic

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.

Experimental Methods in Chemical Engineering: Nuclear Magnetic Resonance

2019 ◽  
Vol 97 (3) ◽  
pp. 628-635 ◽  
Author(s):  
Marco G. Rigamonti ◽  
Francesco G. Gatti ◽  
Gregory S. Patience
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Chemical Engineering ◽  
Experimental Methods ◽  
Nuclear Magnetic

scholarly journals Preparing High Purity Initial States for Nuclear Magnetic Resonance Quantum Computing

2004 ◽  
Vol 93 (4) ◽  
Author(s):  
M. S. Anwar ◽  
D. Blazina ◽  
H. A. Carteret ◽  
S. B. Duckett ◽  
T. K. Halstead ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Quantum Computing ◽  
Magnetic Resonance ◽  
High Purity ◽  
Initial States ◽  
Nuclear Magnetic Resonance Quantum ◽  
Nuclear Magnetic

scholarly journals Classical to quantum in large-number limit

2012 ◽  
Vol 370 (1976) ◽  
pp. 4810-4820 ◽  
Author(s):  
Kavan Modi ◽  
Rosario Fazio ◽  
Saverio Pascazio ◽  
Vlatko Vedral ◽  
Kazuya Yuasa
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Quantum Systems ◽  
Quantum States ◽  
Nuclear Magnetic

We construct a quantumness witness following the work of Alicki & van Ryn (AvR). We reformulate the AvR test by defining it for quantum states rather than for observables. This allows us to identify the necessary quantities and resources to detect quantumness for any given system. The first quantity turns out to be the purity of the system. When applying the witness to a system with even moderate mixedness, the protocol is unable to reveal any quantumness. We then show that having many copies of the system leads the witness to reveal quantumness. This seems contrary to the Bohr correspondence, which asserts that, in the large-number limit, quantum systems become classical, whereas the witness shows quantumness when several non-quantum systems, as determined by the witness, are considered together. However, the resources required to detect the quantumness increase dramatically with the number of systems. We apply the quantumness witness for systems that are highly mixed but in the large-number limit that resembles nuclear magnetic resonance (NMR) systems. We make several conclusions about detecting quantumness in NMR-like systems.

Sign in / Sign up

Export Citation Format

Share Document