A link to a video giving a classical or logical explanation of quantum mechanics and quantum computers.
To have an objective understanding of quantum computers that fits in with the reality of our everyday life we would need an objective understanding of quantum mechanics itself.
But first if we look at how ordinary computer works we find that modern computers require data to be encoded into binary digits or (bits). A bit is the basic unit of information in computing and digital communications. A bit can have only one of two values the most common representation of these values are 0 and 1.
The two values can also be interpreted as logical values such as: true/false, yes/no, on/off or the signs (+/−) or any other two-valued states.
In information theory, one bit is typically defined as the uncertainty of a binary random variable that is 0 or 1 with equal probability until the information is gained when the value of such a variable becomes known.
A quantum computer makes direct use of quantum mechanical phenomena, such as superposition and entanglement to perform operations. Instead of having bits we have qubits or quantum bits that can be zero and one at the same time.
The Bloch Sphere is a geometrical representation of a quantum bit or qubit.
There are a number of physical objects that can be used as a qubit like a single photon or an electron. Scientists have used the outer most electron of an atom as a qubit. It works because all electrons have magnetic fields they are like little bar magnets and this property is called spin. They have spin up and spin down just like a classical bit having 1 or 0.
But the big differences is that they can have spin up or spin down at the same time and this is where the quantum computer gets its superior computing power from.
There is no logical or classical explanation of why a single photon or electron can represent a quantum bit or qubit and therefore represent zero and one at the same time.
This video will put forward the idea that we don’t have a logical explanation of this because we don’t have a complete understanding of the nature of ‘time’ as a physical process.
The only explanation is that ‘time’ is an emergent property with the future continuously coming into existence photon by photon within a Universe of continuous creation.
In other words the spontaneous absorption and emission of light forms a process of continuous change or energy exchange that we see and feel as the continuum of time
This gives us a logical or classical understanding of quantum mechanics; Quantum physics represent the physics of ‘time’ as a physical process continuously unfolding at the quantum level of the atoms. Therefore quantum uncertainty known as Heisenberg's Uncertainty Principle is the same uncertainty we have with any future event that we can interact with turning the possible into the actual within our own reference frame.
Because the photon of quantum mechanics is also the carrier that forms the movement of EM fields this also gives us an object understanding to why we can create electricity!
The man that gave us AC currant Nikola Tesla said:
“The day when we shall know exactly what electricity is will chronicle an event probably greater more important, than any other recorded in the history of the human race”.