Entang-bling: Observing quantum correlations in room-temperature solids

6th International Workshop DICE2012 Spacetime – Matter – Quantum Mechanics: From the Planck Scale to Emergent Phenomena

物理学;力学

Walmsley, I.A.^1 ; Lee, K.C.^1 ; Sprague, M.^1 ; Sussman, B.^1 ; Nunn, J.^1 ; Langford, N.^1 ; Jin, X.-M.^1 ; Champion, T.^1 ; Michelberger, P.^1 ; Reim, K.^1 ; England, D.^1 ; Jaksch, D.^1

University of Oxford, Department of Physics, Clarendon Laboratory, Parks Rd, Oxford, OX3 0BU, United Kingdom^1

关键词: Ambient conditions;    Classical context;    Noisy environment;    Quantum correlations;    Quantum technologies;    Scattered photons;    Strong interaction;    Vibrational state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/442/1/012004/pdf
DOI  :  10.1088/1742-6596/442/1/012004

学科分类：力学，机械学

来源: IOP

【 摘 要 】

Quantum entanglement in the motion of macroscopic solid bodies has implications both for quantum technologies and foundational studies of the boundary between the quantum and classical worlds. Entanglement is usually fragile in room-temperature solids, owing to strong interactions both internally and with the noisy environment. We generated motional entanglement between vibrational states of two spatially separated, millimeter-sized diamonds at room temperature. By measuring strong nonclassical correlations between Raman-scattered photons, we showed that the quantum state of the diamonds has positive concurrence with 98% probability. Our results show that entanglement can persist in the classical context of moving macroscopic solids in ambient conditions.