Classification of macroscopic quantum effects

OPTICS COMMUNICATIONS

卷:337

Article

Farrow, Tristan^1,2  Vedral, Vlatko^1,2 

[1] Univ Oxford, Dept Phys, Oxford OX1 3PU, England

[2] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore

关键词: Macroscopic quantum states;    Quantum Coherence;    Molecule;    GHZ state;   

DOI  :  10.1016/j.optcom.2014.06.042

来源: Elsevier

【 摘 要 】

We review canonical experiments on systems that have pushed the boundary between the quantum and classical worlds towards much larger scales, and discuss their unique features that enable quantum coherence to survive. Because the types of systems differ so widely, we use a case by case approach to identifying the different parameters and criteria that capture their behaviour in a quantum mechanical framework. We find it helpful to categorise systems into three broad classes defined by mass, spatio-temporal coherence, and number of particles. The classes are not mutually exclusive and in fact the properties of some systems fit into several classes. We discuss experiments by turn, starting with interference of massive objects like macromolecules and micro-mechanical resonators, followed by self-interference of single particles in complex molecules, before examining the striking advances made with superconducting qubits. Finally, we propose a theoretical basis for quantifying the macroscopic features of a system to lay the ground for a more systematic comparison or the quantum properties in disparate systems. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free