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Dynamic Hysteresis Across a Dissipative Multi-Mode Phase Transition

by Marvin Röhrle, Jens Benary, Erik Bernhart, Herwig Ott

Submission summary

Authors (as registered SciPost users): Marvin Röhrle
Submission information
Preprint Link:  (pdf)
Date submitted: 2024-03-29 06:57
Submitted by: Röhrle, Marvin
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
  • Atomic, Molecular and Optical Physics - Experiment
  • Quantum Physics
Approach: Experimental


Dissipative phase transitions are characteristic features in open quantum systems. Key signatures are the dynamical switching between different states in the vicinity of the phase transition and the appearance of hysteresis. Here, we experimentally study dynamic sweeps across a first order dissipative phase transition in a multi-mode driven-dissipative system. In contrast to previous studies, we perform sweeps of the dissipation strength instead of the driving strength. We extract exponents for the scaling of the hysteresis area in dependence of the sweep time and study the $g^{(2)}(0)$ correlations, which show non-trivial behavior. By changing the temperature of the system we investigate the importance of coherently pumping the system. We compare our results to numerical calculations done for a single mode variant of the system, and find surprisingly good agreement. Furthermore, we identify and discuss the differences between a scan of the dissipation strength and a scan of the driving strength.

Author comments upon resubmission

Based on the feedback from the referees we rewrote some of the sections in order to make the presentation of the results more clear. Furthermore, we added some additional physical arguments, which address questions raised by the referees. We expanded the supplementary to explain the experimental sequence.

List of changes

- Rewrote the sentence in the abstract about the temperature dependence
- Rewrote the introduction starting from the third paragraph, it first introduces the concept of dissipative phase transition and then emphasizes the progress of hysteresis in related systems and adding more citations to appropriate papers
- We removed the single subsection heading in the "Physical setup and theoretical description" section
- Added a reference in the experimental setup part to the supplementary material, which has a section with a detailed explanation of the experimental sequence and a graph visualizing it
- Added another reference to a recent theoretical work, which uses a single mode model, in order to motivate our use of a single mode model for qualitative comparison
- In the discussion of the correlations we made it more clear, what part of the graph we refer to and added guides to the eye to figure 4 (a)
- We added a note about the $g^2$ of the theory curve going below 1
- In figure 5 (a) we added a theory fit with $\alpha = -1$ and added discussion to the text, that this is also acceptable
- We exchanged the x-axis in figure 6, the condensate fraction is now the main axis
- We focus in the temperature section more on the condensate fraction and coherence, since the hysteresis disappears for a single mode model with thermal (incoherent) drive
- We fixed errors in the labels of figure 5 and 6
- We fixed a grammatical error in the conclusion
- We changed the conclusion to reflect the changes in the other sections and introduction

Current status:
In refereeing

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