宏观量子效应（Macroscopic Quantum Effect）是指在宏观领域中表现出现的量子效应。在超低温、高压等某些特殊条件下，由大量粒子组成的宏观系统会呈现出宏观量子效应。
用瞬子方法研究了外加磁场对单畴双轴反铁磁颗粒宏观量子效应的影响。
The effect of the external magnetic field on macroscopic quantum tunneling in biaxial single domain antiferromagnetic particles is studied with the help of the instanton method.
纳米粒子具有的量子尺寸效应、表面效应和宏观量子隧道效应等，使其表现出很多独特的物理及化学性能。
When the size of particles is decreased to nano-scale, the particles will possess many special characteristics as quantum size effect, surface effect, macro-quantum tunnel effect.
纳米微粒具有的表面效应、量子尺寸效应、宏观量子隧道效应等使纳米微粒具有特殊的物理和化学性质。
Nano-particle has surface effect, quantum dimension effect, and macro quantum effect and so on, which make nano-particle have particular physical and chemical properties.
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