Definition

1. Noun:
   • A property of a system or physical law where it remains identical under a mirror reflection transformation: In physics, "mirror symmetry" specifically refers to the conservation of parity, meaning the laws of physics operate identically in a right-handed coordinate system as they do in a left-handed one. It implies the universe is symmetric with respect to left-right inversion.

Usage

• "Mirror symmetry" is a technical term used primarily in theoretical physics, particularly in discussions of particle physics, quantum mechanics, and cosmology.
• It describes a fundamental symmetry principle. When this symmetry is present, a process and its mirror image are equally probable.
• The term is often used in the context of its violation, as in "the violation of mirror symmetry" or "parity violation," which was a major discovery in physics.

Examples

• Noun:
  • The theory assumed perfect mirror symmetry, but the experiment revealed a slight violation.
  • In a universe with mirror symmetry, a left-handed neutrino and its right-handed mirror image would behave in exactly the same way.

Advanced Usage

• "To exhibit mirror symmetry": To display the property of being identical to one's mirror image under the relevant physical laws.
  • The crystal lattice was found to exhibit mirror symmetry along its central plane.
• "Break/broken mirror symmetry": Refers to a situation where this parity symmetry is not conserved.
  • The discovery of broken mirror symmetry in weak nuclear forces revolutionized particle physics.

Variants and Related Words

• Parity (n): Often used synonymously with "mirror symmetry" in physics, specifically referring to the symmetry under spatial inversion.
• Symmetry (n): A more general term for invariance under a transformation, of which mirror symmetry is a specific type.
• Reflection symmetry (n): A closely related term, sometimes used interchangeably in broader contexts, though "mirror symmetry" in physics is more specific to the conservation law.

Synonyms

• Parity symmetry: The exact synonym in the context of physics.
• Space-reflection symmetry: Another precise synonym emphasizing the spatial inversion.

Related Phrases/Concepts

• P-symmetry: An abbreviation for parity symmetry, which is the technical term for mirror symmetry.
• Parity violation: The phenomenon where mirror symmetry is not conserved, a key concept in the Standard Model of particle physics.

Noun

1. (physics) parity is conserved in a universe in which the laws of physics are the same in a right-handed system of coordinates as in a left-handed system