Limits...
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.


Related in: MedlinePlus

R versus L with ε = 0.4 × 10-5, and V = 20 mV, 1.5 V.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3211445&req=5

Figure 6: R versus L with ε = 0.4 × 10-5, and V = 20 mV, 1.5 V.

Mentions: For a clear view of squeezing factor R as a function of film length L, 2D curves from Figure 5b are presented in Figure 6. It is found that R approaches unity as L approaches zero, while R tends to be zero as L approaches infinity as shown in Figure 6a,b. It explains why R has some kinked regions, shown in the upper right part of Figure 5b with black circle, when the graphene film length is on the nanometer scale shown in Figure 3. To realize quantum squeezing, the graphene film length should be in the order of a few micrometers and the applied voltage V should not be as small as several mV, shown in Figure 6b. As L → 0, where the graphene film can be modeled as a quantum dot, the voltage must be as large as a few volts to modulate the film to achieve quantum squeezing. As L → ∞, where graphene films can be modeled as a 1D chain, the displacement uncertainty would be on the nanometer scale so that even a few mV of pumping voltage can modulate the film to achieve quantum squeezing easily.


Quantum-squeezing effects of strained multilayer graphene NEMS.

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

R versus L with ε = 0.4 × 10-5, and V = 20 mV, 1.5 V.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 6: R versus L with ε = 0.4 × 10-5, and V = 20 mV, 1.5 V.
Mentions: For a clear view of squeezing factor R as a function of film length L, 2D curves from Figure 5b are presented in Figure 6. It is found that R approaches unity as L approaches zero, while R tends to be zero as L approaches infinity as shown in Figure 6a,b. It explains why R has some kinked regions, shown in the upper right part of Figure 5b with black circle, when the graphene film length is on the nanometer scale shown in Figure 3. To realize quantum squeezing, the graphene film length should be in the order of a few micrometers and the applied voltage V should not be as small as several mV, shown in Figure 6b. As L → 0, where the graphene film can be modeled as a quantum dot, the voltage must be as large as a few volts to modulate the film to achieve quantum squeezing. As L → ∞, where graphene films can be modeled as a 1D chain, the displacement uncertainty would be on the nanometer scale so that even a few mV of pumping voltage can modulate the film to achieve quantum squeezing easily.

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