Open quantum dynamics theory for a complex subenvironment system with a quantum thermostat: Application to a spin heat bath

量子退相干 物理 量子耗散 恒温器 自由度(物理和化学) 量子动力学 量子 自旋(空气动力学) 放松(心理学) 量子力学 量子相变 统计物理学 凝聚态物理 热力学 心理学 社会心理学
作者
Kiyoto Nakamura,Yoshitaka Tanimura
出处
期刊:Journal of Chemical Physics [American Institute of Physics]
被引量:2
标识
DOI:10.1063/5.0074047
摘要

Complex environments, such as molecular matrices and biological material, play a fundamental role in many important dynamic processes in condensed phases. Because it is extremely difficult to conduct full quantum dynamics simulations on such environments due to their many degrees of freedom, here, we treat in detail the environment only around the main system of interest (the subenvironment), while the other degrees of freedom needed to maintain the equilibrium temperature are described by a simple harmonic bath, which we call a quantum thermostat. The noise generated by the subenvironment is spatially non-local and non-Gaussian and cannot be characterized by the fluctuation–dissipation theorem. We describe this model by simulating the dynamics of a two-level system (TLS) that interacts with a subenvironment consisting of a one-dimensional XXZ spin chain. The hierarchical Schrödinger equations of motion are employed to describe the quantum thermostat, allowing for time-irreversible simulations of the dynamics at arbitrary temperature. To see the effects of a quantum phase transition of the subenvironment, we investigate the decoherence and relaxation processes of the TLS at zero and finite temperatures for various values of the spin anisotropy. We observed the decoherence of the TLS at finite temperature even when the anisotropy of the XXZ model is enormous. We also found that the population-relaxation dynamics of the TLS changed in a complex manner with the change in the anisotropy and the ferromagnetic or antiferromagnetic orders of spins.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
ddy发布了新的文献求助10
刚刚
无辜的水蓝完成签到,获得积分10
1秒前
xyc_liang完成签到,获得积分10
1秒前
Cici发布了新的文献求助10
2秒前
玉玉发布了新的文献求助10
2秒前
3秒前
3秒前
3秒前
林七七发布了新的文献求助30
3秒前
3秒前
wang发布了新的文献求助10
3秒前
香蕉觅云应助淡然钢笔采纳,获得30
4秒前
FashionBoy应助Roseaiwade采纳,获得10
4秒前
CipherSage应助Stern采纳,获得10
4秒前
Juvenilesy完成签到,获得积分10
4秒前
5秒前
liu发布了新的文献求助10
5秒前
李明明发布了新的文献求助10
6秒前
6秒前
6秒前
Akim应助acommonreader采纳,获得10
7秒前
zhb123发布了新的文献求助10
8秒前
Xx发布了新的文献求助10
8秒前
synthia应助研友_LBKR9n采纳,获得10
8秒前
柒玥完成签到,获得积分10
8秒前
本来就这样完成签到,获得积分10
8秒前
满意的皮带完成签到,获得积分10
8秒前
9秒前
潇湘完成签到,获得积分10
9秒前
slzx发布了新的文献求助10
9秒前
CodeCraft应助幽默的厉采纳,获得10
10秒前
害羞猫咪完成签到,获得积分10
10秒前
柒玥发布了新的文献求助10
11秒前
Owen应助常琳琳采纳,获得10
12秒前
Jessie发布了新的文献求助10
12秒前
saisai完成签到,获得积分10
12秒前
13秒前
13秒前
郭mm发布了新的文献求助10
13秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 360
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3970724
求助须知:如何正确求助?哪些是违规求助? 3515419
关于积分的说明 11178342
捐赠科研通 3250592
什么是DOI,文献DOI怎么找? 1795372
邀请新用户注册赠送积分活动 875802
科研通“疑难数据库(出版商)”最低求助积分说明 805181