Anomalously reduced homogeneous broadening of two-dimensional electronic spectroscopy at high temperature by detailed balance
arxiv(2024)
摘要
Dissipation and decoherence of quantum systems in thermal environments is
important to various spectroscopies. It is generally believed that dissipation
can broaden the line shape of spectroscopies, and thus stronger system-bath
interaction can result in more significant homogeneous broadening of
two-dimensional electronic spectroscopy (2DES). Here we show that the case can
be the opposite in the regime of electromagnetically induced transparency
(EIT). We predict that assisted by EIT, the homogeneous broadening of the 2DES
at a higher temperature can be significantly reduced due to the detailed
balance. This anomalous effect is due to the long-lasting off-diagonal peaks in
2DES.
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