![]() ![]() Interaction causes their particles to lose their quantum states and reduce themselves to occupying single states. Their particles are close together and interact with each other and with things in the environment like air molecules. Macroscopic objects cannot maintain the quantum coherence of their particles. This usage follows the conventions of how physicists speak about these things. As a note, throughout this discussion, I’ve used the term “quantum particle” even when it’s coherent and acting wavelike. Its behavior is now understood according to the classical laws of physics, in particular, the laws of electromagnetism. (Frogs have such good night vision that they can see a single photon.) Now, the photon has left the quantum world of being in a superposition of many states and joined the macroscopic world, in which it’s in a single state. When the photon is absorbed by the electron in the frog’s retina, the frog might see a little spark of light. In that moment, it has decohered.įrog enjoying a photon which has decohered. So, the photon has lost its superposition and, for a brief moment, occupies Position C. Further, let’s say that, at a certain moment during the night, the photon travels to Position C-it hits the retina of the frog and is absorbed by an electron in the retina. Let’s say that Position C is smack in the middle of the retina of a frog. For example, a photon experiencing coherence might, at the same moment, be in Position A, B, and C. In other words, coherent particles are quantum particles which are following the laws of quantum mechanics. Displays other forms of quantum weirdness.If entangled with another particle, correlates its behavior instantaneously with its entangled partner, regardless of distance and.Follows the Heisenberg Uncertainty Principle.In the two-slit experiment, can form an interference pattern.It behaves in accordance with the Schrodinger Equation and: In its coherent state, a quantum particle acts like a strange set of waves. In its quantum state, a particle is in a superposition of many states. When we say that a quantum particle is coherent, we are saying that it is in its quantum state. Quantum coherence is a property of a quantum particle. Quantum decoherence and quantum superposition More on Coherence Decoherence is the physical meaning often assigned to the collapse of the wave function. It becomes an ordinary particle that follows the laws of classical electromagnetism and other classical physics laws. In contrast, when decoherent, a quantum particle is detected as a particle. So, what is coherence? When a quantum particle is coherent, it acts wavelike and displays properties that people consider to be quantum weirdness, as described below. ![]() Interpretations of quantum mechanics and in addressing foundational questions.(Also called “quantum decoherence.”) Decoherence occurs when a quantum particle loses its coherence. We also comment on the role decoherence may play in We survey methods for avoiding and mitigatingĭecoherence and give an overview of several experiments that have studiedĭecoherence processes. We review several classes ofĭecoherence models and discuss the description of the decoherence dynamics in Introduce the essential concepts and the mathematical formalism of decoherence,įocusing on the picture of the decoherence process as a continuous monitoring The theory and experimental observation of the decoherence mechanism. Of devices for quantum information processing. Quantum-to-classical transition and is the main impediment to the realization Download a PDF of the paper titled Quantum Decoherence, by Maximilian Schlosshauer Download PDF Abstract: Quantum decoherence plays a pivotal role in the dynamical description of the ![]()
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