Report
Emergent classical gauge symmetry from quantum entanglement
| العنوان: | Emergent classical gauge symmetry from quantum entanglement |
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| المؤلفون: | Kirklin, Josh |
| سنة النشر: | 2022 |
| المجموعة: | Mathematics General Relativity and Quantum Cosmology High Energy Physics - Theory Mathematical Physics Quantum Physics |
| مصطلحات موضوعية: | High Energy Physics - Theory, General Relativity and Quantum Cosmology, Mathematical Physics, Quantum Physics |
| الوصف: | We describe explicitly how entanglement between quantum mechanical subsystems can lead to emergent gauge symmetry in a classical limit. We first provide a precise characterisation of when it is consistent to treat a quantum subsystem classically in such a limit, namely: in any quantum state corresponding to a definite classical state in the classical limit, the reduced density matrix of the subsystem must be approximately proportional to a projection operator, and the projection operators for different classical subsystem states must obey an approximate mutual orthogonality condition. These are strong constraints on the entanglement structure of classical states. They generically give rise to fundamentally non-local classical degrees of freedom, which may nevertheless be accounted for using a completely local kinematical description, if one gauges this description in the right way. The mechanism we describe is very general, but for concreteness we exhibit a toy example involving three entangled spins at high angular momentum, and we also describe a significant group-theoretic generalisation of this toy example. Finally, we give evidence that this phenomenon plays a role in the emergence of bulk diffeomorphism invariance in gravity. Comment: 50 pages, 4 figures, 1 piece of AI-generated art. Comments welcome and appreciated |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2209.03979 |
| رقم الانضمام: | edsarx.2209.03979 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |