Driven open transitions outside every equilibrium universality class
In plain words
Most transitions in pumped, leaky quantum systems look like ordinary thermal transitions at long distances, because noise acts like a temperature. The question is which open quantum systems have genuinely different critical behaviour.
Precise statement
In Markovian (Lindblad) open systems, low-frequency noise generically produces an effective temperature and classical critical behaviour (Sieberer, Huber, Altman, Diehl 2013). Classify the mechanisms (pure dark steady states, absorbing states with coherent dynamics, symmetry constraints) that yield critical exponents differing from every equilibrium class, and identify at least one experimentally realizable model with computed exponents. Answer: a classification with explicit examples.
What would settle it
Controlled renormalization-group or numerical exponents outside equilibrium classes in a specific model, confirmed in a quantum simulator.
Status in the literature
Unverified note: it names recent work and was partly written without a live literature search; it awaits a check by an editor.
Several nonequilibrium fixed points are identified theoretically (reviewed in the 2025 RMP); experimental confirmation is lacking.
Problems built on this one
Special cases
- Universality classes of dissipative phase transitions in atomic gases · open
- Critical exponents of the two-dimensional quantum contact process · open
Results
No results have been posted on this problem yet.
Post a result · how results are checked
Sign in to follow or save this problem
Comments (0)
Comments are not records: they are not signed, stamped or logged. How comments work
No comments yet.
Sign in to comment.