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A Preliminary Analysis of Quantum Change as One Achievement of Phase Change
Release time:
2021-03-07
In essence, while the study of quantum phase transitions hasn't been around for a very long time, its scope encompasses a considerably extensive history, as humanity has long conducted research on this phenomenon. In recent times, research into quantum phase transitions has focused on relative changes caused by quantum fluctuations. Initially, it was believed that similar phase changes might occur in experiments involving excitons, such as antiferromagnetism in high-temperature superconductors, where the transition to a superconducting state is attributed to the presence of excitons. In recent times, research into quantum phase transitions has focused on relative changes caused by quantum fluctuations. Initially, it was believed that similar phase changes might occur in experiments involving excitons, such as antiferromagnetism in high-temperature superconductors, where the transition to a superconducting state is attributed to the presence of excitons.
Undeniably, there are numerous other ways to define quantum phase transitions, as long as they are not caused by thermodynamic changes in the material's properties. However, if we trace back to the origins, the quantum phase transitions we study are essentially phase changes in quantum phases, a field of research that began as early as humanity's exploration of many-body systems. The exact time is uncertain, but it was likely around the mid-20th century, 70 years after the outbreak of World War I, and bears resemblance to the quantum models we discuss today. Many experiments utilized Wigner's transformation. The reason non-thermal effects attracted human attention is largely due to the inherent difficulty in solving the many-body problem. This led to delays and postponements. In the study of many-body systems, such as solutions, numerous research methods and approaches exist. Each major category has many different methods, and fundamentally, the problem is quite complex. Numerical studies, in particular, have become a major branch of scientific research, and are closely related to many-body problems. Therefore, many-body research can be considered to start from 0K. Quantum phase transitions can also be seen as a compromise. Low-temperature technology has developed rapidly, and current cold atom technology can realize many theoretical models. In short, after decades of development, people have gained a certain understanding of the phase transitions caused by quantum fluctuations. However, this understanding is still largely concentrated in one-dimensional or quasi-one-dimensional systems. Although two-dimensional research emerged very early, its significant progress might have occurred in the last ten years, possibly due to graphene and topology. In summary, initially, there was no concept of quantum phase transitions, but people wanted to understand the possible states of different quantum systems and whether there were certain governing laws. Later, as the accumulation of knowledge grew, a research branch and a name naturally emerged: quantum phase transitions.
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