If entanglement swapping works, photons 1 and 4 should also become entangled--even though they have never met--and project into the same quantum state as photons 2 and 3.
The same interdot tunneling couplings and the same quantum-dot energy levels ε1 = ε2 = ε3 = ε4 = ε5 = ε0 = 0 are considered.
Since B and C have the same quantum states, that means C also has the same quantum state as A. If A and B are different, they will come out of the beam-splitter in one of three different places, depending on exactly which way they are different.
Matter, Feynman reasoned, is made of particles such as electrons and protons that obey the same quantum laws that would govern this new computer's operation.
He hoped that Feynman's uncanny insights and expert knowledge of QED would enable him to offer bold suggestions as to how to bring electromagnetic and gravitational theories under the same quantum umbrella.
We found that the holes' vibrational sublevels with gaps significantly smaller than the corresponding values between the electronic levels and the gaps between bonding and anti-bonding levels with the same quantum numbers are larger than the gaps between two levels with the same parity and different quantum numbers.
To create a qubit in a solid-state device, physicist Yasunobu Nakamura of the NEC Fundamental Research Laboratory in Tsukuba, Japan, and his colleagues resorted to superconductors, whose electrons all share the same quantum state and travel together in pairs.
Similarly, the gaps between bonding and anti-bonding levels with the same quantum numbers, (n e, l e ), are larger than the gaps between the two levels with the same parity and different quantum numbers.
(A BEC is a clump of atoms that are all in the same quantum state and hence act as a single "super atom").
In the case of interacting atoms, however, a strong repulsive force is created between bound electron shells and their quantum-mechanical wavefunctions because of the Pauli exclusion principle (which holds that no two particles such as electrons may occupy the same quantum state), and the atomic-pair potential diverges steeply towards infinity as r approaches zero.
