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RESONANT TUNNING THROUGH QUANTUM DOT ARRAY
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ABSRACT - [ Total Page(s): 1 ]Abstract coming soon
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CHAPTER ONE - [ Total Page(s): 4 ]CHAPTER ONERESONANT TUNNELING THROUGH QUANTUM DOT ARRAYS1.1 IntroductionResonant tunneling through Quantum dot arrays is the quantum-mechanical effect of transition through a classically-forbidden energy state.Consider rolling a ball up a hill. If the ball is not given enough velocity, then it will not roll over the hill. This makes sense classically. But in quantum mechanics, objects exhibit wavelike behavior. For a quantum particle moving against a potential hill, the wave function describing the particle can extend to the other side of the hill. This wave represents the probability of ... Continue Reading
CHAPTER TWO - [ Total Page(s): 2 ]CHAPTER TWORESONANT TUNNELING THROUGH QUANTUM DOT ARRAY PROCESSE is incident on a potential barrier of height V0 . Classically the electron is reflected when E< V0, but quantum mechanically there is a certain probability that the electron is transmitted through the barrier.Tunneling is a purely quantum mechanical phenomena which enables electrons to penetrate potential barriers even though it is classically forbidden. The scheme is illustrated in Figure above. Classically the electron would be reflected if E¿VO but due to tunneling there is a probability that the electron penetrates the bar ... Continue Reading
CHAPTER THREE - [ Total Page(s): 9 ]The Hamiltonian equation above is a representation of Quantum dot array i.e 1- Darray of N coupled dots index from left to right as 1- N. looking at the energy of a quantum dot confined dots (20 energy states been treated as a single quantum systemFrom the equationεka is the energy levels in leadsεia is the ith dot of the energy Ui is theith inter- dot repulsion and the inter-dot coupling between theith dot and its rightneighbor (the (i+1)th dot)V L and V R are the tunnels matrix element connecting thedot 1 (dot N) to the left and right lead. ... Continue Reading
CHAPTER FOUR - [ Total Page(s): 2 ]CHAPTER FOURDISCUSSION OF RESULTSFrom the matrices gotten in the previous chapter, it is seen that the diagonal four-by-four matrices are proportional to the partition function Z.In Eq. (2), En, is the energy of many-body state (n, i), the ith of the n-particle states, RL ,®ij are the transition rates between state (n,i) and (n-I,j) by losing or getting one electron through the left (right) lead, and peqn,I is the occupation probability of state (n,i) at equilibriumEquation (2) is basically the same as those used in ref. 3 for single dots. The only difference is that the eigenstates of an a ... Continue Reading
CHAPTER FIVE - [ Total Page(s): 3 ]CHAPTER FIVECONCLUSION ... Continue Reading
REFRENCES - [ Total Page(s): 1 ]REFERENCESFriedlander, Michael W. 2000 A Thin Cosmic Rain: Particles from Outer Space (Cambridge:Harvard University Press).Watson, Alan 2001 “Ultra High Energy Cosmic Rays: What we Know Now and What the FutureHolds,†in Relativistic Astrophysics: 20th Texas Symposium (AIP Conference Procedings, volume 586, J. C. Wheeler and H. Martel (eds.) American Institure of Physics, pp. 817–826. (The original abstract was different from the published abstract)Anderson, Carl D. 1933. “The Positive Electron,†Phys. Rev. 43, 491–494. Hillas, A. M. 1972. Co ... Continue Reading
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ABSRACT - [ Total Page(s): 1 ]Abstract coming soon
... Continue Reading
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