Schrödinger’s Cat and the Qbit - Physics Forums
2024年4月2日 · Anything with a 2-dim Hilbert space is a qubit " As an approximation for analyzing particular experiments, this can work ok–basically you are ignoring all the other degrees of …
Information content of a qubit - Physics Forums
2020年11月22日 · A qubit, short for quantum bit, is the basic unit of quantum information. It is the quantum equivalent of a classical bit, which can represent either a 0 or a 1. However, unlike a …
Density Matrix of Multiple Qubits - Physics Forums
2023年10月17日 · The partial trace is a mathematical operation used to trace out (ignore) parts of a quantum system, effectively reducing the density matrix to a subsystem of interest. For …
Quantum Physics Forum
2021年12月16日 · Quantum physics, or quantum mechanics, is a branch of physics that explores the behavior of matter and energy at the smallest scales, where classical physics principles …
What Planck Length Is and It’s Common Misconceptions - Physics …
2015年9月9日 · The Planck length is an extremely small distance constructed from physical constants. Many misconceptions generally overstate its physical significance, stating that it’s …
Understanding Z2 Symmetry in Models - Physics Forums
2009年2月6日 · Even simple, [itex]\mathbb{Z}_2[/itex] refers to a group, namely that of additon mod 2. It only has two elements, the identity and element a, which satisfies a^2 = 1.
Local mechanism for nonlocal anticorrelations inside spin theory
2024年10月22日 · If Alice and Bob each measure an entangled qubit, Bob's expectation value for a given measurement (i.e., a given angle he chooses for his measuring device to measure the …
A homebrew quantum computer simulator - Physics Forums
2022年3月30日 · A while ago I started writing a quantum computer simulator in order to learn more about quantum computing. It certainly has helped me. The simulator is written in Python …
Energy in Everett's Many-worlds Interpretation - Physics Forums
2019年2月15日 · Hi, Is anybody able to explain how energy is "distributed" in the many-worlds interpretation. I'm using scare quotes as I think this may be the wrong line of thought. It's …
Quantum Physics via Quantum Tomography: A New Approach
2022年1月8日 · This notion generalizes the polarization properties of light: In the case of the polarization of a source of light, the density operator represents a qubit and is given by a …