- #1
H-bar None
- 45
- 0
How do quantum gates work and how our they different than classical gates?
Antiphon said:Crudely put, the idea is that a quantum system can achieve calculation with the
wavefunction in the "wave" mode rather than the "particle" mode. Wave phenomena
are inherently "parallel" when used as a computational tool, so you'd be doing lots
of "work" in a single computational step.
marlon said:Well, this is not really accurate. The biggest difference between a qubit and an ordinary bit is the fact that a bit is either 1 or 0. The qubit is a SUPERPOSITION of 1 and 0. So the qubit really is the 'combination' of the two possible bit-states.
A quantum computer could in principle try all the divisors simultaneously. You would
make a quantum "measurment" of the result that had no remainder, forcing the one calculation you wanted to see to become the manifested value.
H-bar None said:How do quantum gates work and how our they different than classical gates?
Quantum gates and circuits are fundamental building blocks of quantum computing that allow for the manipulation of quantum bits (qubits) and the execution of quantum algorithms. They are analogous to classical logic gates and circuits, but operate on the principles of quantum mechanics.
Quantum gates work by manipulating the state of qubits, which can exist in a superposition of multiple states simultaneously. This allows for more complex and powerful computations to be carried out than in classical computing.
Classical gates operate on classical bits, which can only exist in two states (0 or 1). Quantum gates, on the other hand, can operate on qubits, which can exist in multiple states at once. This allows for the potential for exponential speedup in certain computations.
Some common types of quantum gates include the Hadamard gate, the Pauli gates (X, Y, and Z), the CNOT gate, and the SWAP gate. These gates are used to perform basic operations such as superposition, rotation, and entanglement.
Quantum gates can be physically implemented using a variety of methods, such as using the spin of individual particles, the polarization of photons, or the energy levels of atoms. They can also be implemented using quantum circuits, which are composed of these physical gates connected in a specific arrangement to perform a desired computation.