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The holy grail of theoretical physics is the unification of all forces, once gravitation is quantized consistently with the other three. The behavior of the coupling constants as the energies probed increases gives an indication that indeed weak strong and electromagnetic may be of the same strength at some high energy as the measurements indicate : The ...

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No, it is not possible, the reason being the phenomenon of "Color confinement", often simply called confinement, which is the phenomenon that color charged particles (such as quarks) cannot be isolated singularly, and therefore cannot be directly observed. Quarks, by default, clump together to form groups, or hadrons. The two types of hadrons are the mesons ...

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The probability of the particle to be found in the state $|A\rangle$ is $|\langle A |\psi\rangle |^2$. In case you have never come across this expression, $\langle A |\psi\rangle$ is called the (probability) amplitude of the state $|A\rangle$ and is basically telling you "how much" of that state there is in the total wavefunction $\psi$. Mathematically, ...

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It's called a diode because the device has two terminals. Devices that have three terminals are called triodes, and those with five pentodes. Words of that type have fallen by the wayside except in the realm of vacuum tube electronics ... except for the word diode, which has hung on. Note that the Wikipedia article that you cite refers specifically to ...

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An RTD is a special type of TD, and a double barrier is just one of many possible implementations of resonant tunneling. An RTD is called "resonant" because (under certain conditions) the transmission function is equal to one, i.e. complete transmission. This happens due to wave-like interference between the two barriers. Hence called "resonant": the phase ...

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The negative differential resistance creates a special phenomena: under a certain bias and certain incident electron energies, the transmission function through the double barrier is nearly zero. In other words, for a finite voltage domain, the current is nearly zero, i.e. a rectifying behaviour. This can be referred to as "generalized diode", since the ...

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