Thanks to quantum uncertainty, which makes it impossible to say simultaneously exactly where a thing is and exactly how fast it's moving, the widget must quake with an inextinguishable zero-point motion and possess an inextricable last half-quantum of energy.
The minimum noise added by a phase insensitive amplifier corresponds to half a quantum of the amplified frequency, ħ ω / 2. In a parametric amplifier, some parameter of the system must be varied in time.
For a long time, whatever the growth technique, the uniformity and quality of the EG was not good enough to find evidence of the so-called "half integer" quantum Hall effect (QHE).
Half-integer quantum conductance was studied under the quantum point conduction model.
In particular, graphene demonstrates unusual half-integer quantum Hall effect [6], which can be observed even at room temperature [10].
Then, the half-integer quantum value appears when N R + N L is an odd number, which is in coherence with the result reported by Miranda et al. as described above.
On the best samples, we find a moderate p-type doping, a high-carrier mobility and resolve the half-integer quantum Hall effect typical of high-quality graphene samples.
It's when the SQUID tries to polish off exactly half a flux quantum that the quantum fun begins.
A quantum half-adder circuit shown earlier can be implemented into each cell of a 1D cellular automaton.
Tuning the magnetic flux can lead to resonant transmission, while half-integer magnetic flux quantum leads to completely destructive interference and transmission zeros in an interferometer with two equal arms.
Graphene exhibits numerous novel electronic and transport properties, for example, half-integer and unconventional quantum hall effect [4], ultrahigh carrier mobility [3], optical effect [12, 13], finite minimal electrical conductivity [4, 14, 15], special Andreev reflection [16] and so on.
