Search results
Results from the WOW.Com Content Network
The macroscopic quantum coherence (off-diagonal long-range order, ODLRO) [25] [26] for superfluidity, and laser light, is related to first-order (1-body) coherence/ODLRO, while superconductivity is related to second-order coherence/ODLRO. (For fermions, such as electrons, only even orders of coherence/ODLRO are possible.)
The Gaussian coherent states of nonrelativistic quantum mechanics can be generalized to relativistic coherent states of Klein-Gordon and Dirac particles. [38] [39] [40] Coherent states have also appeared in works on loop quantum gravity or for the construction of (semi)classical canonical quantum general relativity. [41] [42]
Quantum mechanics is a fundamental theory that describes the behavior of nature at and below the scale of atoms. [2]: 1.1 It is the foundation of all quantum physics, which includes quantum chemistry, quantum field theory, quantum technology, and quantum information science. Quantum mechanics can describe many systems that classical physics cannot.
Quantum decoherence is the loss of quantum coherence. Quantum decoherence has been studied to understand how quantum systems convert to systems that can be explained by classical mechanics. Beginning out of attempts to extend the understanding of quantum mechanics, the theory has developed in several directions and experimental studies have ...
Coherent state are quantum mechanical states that have the maximal coherence and have the most "classical"-like behavior. A coherent state is defined as the quantum mechanical state that is the eigenstate of the electric field operator E ^ + {\displaystyle {\hat {E}}^{+}} .
Coherence The visibility of diffraction features using an optical theory approach depends on the beam coherence, [27] which at the quantum level is equivalent to a density matrix approach. [ 69 ] [ 70 ] As with light, transverse coherence (across the direction of propagation) can be increased by collimation .
This is a glossary for the terminology often encountered in undergraduate quantum mechanics courses.. Cautions: Different authors may have different definitions for the same term.
In physics, atomic coherence is the induced coherence between levels of a multi-level atomic system and an electromagnetic field. The internal state of an atom is characterized by a superposition of excited states and their associated energy levels .