Quantum Entanglement and Speed

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quantum entanglement breaks speed-of-light travel

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The concept of quantum entanglement potentially breaking the speed-of-light barrier is a complex and debated topic in physics. Quantum entanglement is a phenomenon where pairs or groups of particles interact in ways such that the quantum state of each particle cannot be described independently of the state of the others, even when the particles are separated by large distances.

  1. A study suggests that maximal entanglement between spin and momentum components of a spin-1/2 particle can be obtained with boosts less than the speed of light, and boosts approaching the speed of light might even decrease entanglement【1†source】.

  2. Another research proposes a bimetric space-time model where a superluminal (faster-than-light) 'S-field' mediates causal exchange of quantum information associated with quantum entanglement. This theory implies that while the usual speed of light remains unchanged, quantum information effects related to the S-field could potentially occur at superluminal speeds【2†source】.

  3. A study on the quantum speed limit discusses bounds on the minimum time a quantum system requires to evolve from one state to another. This research could provide insights into the limits of how fast quantum state transformations, including those involving entanglement, can occur【3†source】.

  4. An analysis of relativistic entangled quantum states shows that for massive particles in the ultra-relativistic limit, entangled states satisfy Bell's inequality when the boost speed approaches the speed of light. This suggests a counterexample for the nonlocality of the Einstein-Podolsky-Rosen (EPR) paradox at relativistic speeds【4†source】.

  5. A pedagogical study presents a mechanical implementation and diagrammatic calculation of quantum entanglement, discussing its instantaneous nature and its implications for the limits of computational processes. It highlights that entanglement, which appears to act instantaneously, does not seem to involve any communication limited by the speed of light【5†source】.

These studies indicate that while quantum entanglement exhibits non-local characteristics that could imply faster-than-light interactions, the relationship between entanglement and the speed of light is complex and not yet fully understood. The precise nature of how entanglement operates relative to the speed of light limit remains an active area of research in quantum physics.

Links:

  1. Generation of maximally entangled states with sub-luminal Lorentz boost
  2. A proposed superluminal S-field mediating quantum entanglement
  3. Speed limits on correlations in bipartite quantum systems
  4. Relativistic entanglement of quantum states and nonlocality of Einstein-Podolsky-Rosen(EPR) paradox
  5. A Mechanical Implementation and Diagrammatic Calculation of Entangled Basis States