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Quantum-squeezing effects of strained multilayer graphene NEMS.

Xu Y, Yan S, Jin Z, Wang Y - Nanoscale Res Lett (2011)

Bottom Line: Quantum squeezing can improve the ultimate measurement precision by squeezing one desired fluctuation of the two physical quantities in Heisenberg relation.We propose a scheme to obtain squeezed states through graphene nanoelectromechanical system (NEMS) taking advantage of their thin thickness in principle.Our research promotes the measured precision limit of graphene-based nano-transducers by reducing quantum noises through squeezed states.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China. yangxu-isee@zju.edu.cn.

ABSTRACT
Quantum squeezing can improve the ultimate measurement precision by squeezing one desired fluctuation of the two physical quantities in Heisenberg relation. We propose a scheme to obtain squeezed states through graphene nanoelectromechanical system (NEMS) taking advantage of their thin thickness in principle. Two key criteria of achieving squeezing states, zero-point displacement uncertainty and squeezing factor of strained multilayer graphene NEMS, are studied. Our research promotes the measured precision limit of graphene-based nano-transducers by reducing quantum noises through squeezed states.

No MeSH data available.


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(a) Δxzp versus various graphene film sizes. (b) Log R versus multilayer graphene film lengths and applied voltages at T = 5 K
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Figure 5: (a) Δxzp versus various graphene film sizes. (b) Log R versus multilayer graphene film lengths and applied voltages at T = 5 K

Mentions: The ordering relation of Δxzp for multilayer graphene is Δxzptrilayer < Δxzpbilayer < Δxzpmonolayer shown in Figure 5a, as the zero-point displacement uncertainty is inversely proportional to the film thickness. Squeezing factors R of multilayer graphene films follow the ordering relation; Rtrilayer >Rbilayer >Rmonolayer, as shown in Figure 5b, as R is proportional to the thickness of the graphene film. The thicker the film, the more difficult it is to achieve a quantum-squeezed state, which also explains why traditional NEMS could not achieve quantum squeezing due to their thickness of several hundred nanometers.


Quantum-squeezing effects of strained multilayer graphene NEMS.

Xu Y, Yan S, Jin Z, Wang Y - Nanoscale Res Lett (2011)

(a) Δxzp versus various graphene film sizes. (b) Log R versus multilayer graphene film lengths and applied voltages at T = 5 K
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211445&req=5

Figure 5: (a) Δxzp versus various graphene film sizes. (b) Log R versus multilayer graphene film lengths and applied voltages at T = 5 K
Mentions: The ordering relation of Δxzp for multilayer graphene is Δxzptrilayer < Δxzpbilayer < Δxzpmonolayer shown in Figure 5a, as the zero-point displacement uncertainty is inversely proportional to the film thickness. Squeezing factors R of multilayer graphene films follow the ordering relation; Rtrilayer >Rbilayer >Rmonolayer, as shown in Figure 5b, as R is proportional to the thickness of the graphene film. The thicker the film, the more difficult it is to achieve a quantum-squeezed state, which also explains why traditional NEMS could not achieve quantum squeezing due to their thickness of several hundred nanometers.

Bottom Line: Quantum squeezing can improve the ultimate measurement precision by squeezing one desired fluctuation of the two physical quantities in Heisenberg relation.We propose a scheme to obtain squeezed states through graphene nanoelectromechanical system (NEMS) taking advantage of their thin thickness in principle.Our research promotes the measured precision limit of graphene-based nano-transducers by reducing quantum noises through squeezed states.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China. yangxu-isee@zju.edu.cn.

ABSTRACT
Quantum squeezing can improve the ultimate measurement precision by squeezing one desired fluctuation of the two physical quantities in Heisenberg relation. We propose a scheme to obtain squeezed states through graphene nanoelectromechanical system (NEMS) taking advantage of their thin thickness in principle. Two key criteria of achieving squeezing states, zero-point displacement uncertainty and squeezing factor of strained multilayer graphene NEMS, are studied. Our research promotes the measured precision limit of graphene-based nano-transducers by reducing quantum noises through squeezed states.

No MeSH data available.


Related in: MedlinePlus