Questions tagged [phase-transition]
A phase transition is a change in the nature of a phase or in the number of phases of a system as a result of a change in the external conditions. Examples: melting/freezing, vaporization/condensation, ferromagnetic transition, superconducting transition.
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Condensation of water droplets on one side of a bottle!
Here is what I observed:
Background:
I kept this bottle in my room, at a place where:
half of it was in complete darkness (well, minimal light did fall on it, but very minimal).
the other half ...
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What is the mechanism behind the Curie point in ferromagnets?
I just finished up a uni course on magnetism, which mostly made sense, but I've been left with some questions about ferromagnetic behaviour; in particular, I'm not satisfied with my lecturer's ...
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Is salt/ice mix wierd? [closed]
I know that many countries use salt for de-icing roads because salt makes ice melt faster (as per my textbook).
I also know that salt is used in freezing mixture for keeping something at freezing ...
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Fragile complex systems
Are there known complex systems that exhibit fragility in the sense that small perturbations — either in the local interaction rules between particles (or agents), or in the surrounding environment — ...
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Is the geometric derivation of computational threshold $λ_c = 1/√2$ from Schmidt circle topology mathematically sound?
I'm investigating whether quantum state manifold geometry predicts computational transitions in quantum systems. Starting from the Schmidt decomposition of bipartite pure states:
|Ψ⟩ = λ₁|s₁⟩⊗|e₁⟩ + λ₂...
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Can the cooling performance of ice be enhanced by freezing it at different pressure?
If I freeze water below atmospheric pressure, could this result in ice that when put into say a drink, will absorb energy faster, than if it was frozen normaly?
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“How can latent energy be harnessed by slowing phase transitions under pressure?”
I’ve been watching water approach its freezing point and noticed a brief “point between” liquid and solid. A small catalyst can make this moment predictable, and if the water is encapsulated under ...
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Do we have good general models for solid-liquid phase transitions?
When reading about phase transitions, one quickly encounters the Ising model and its variants (spin glass, Potts, etc.).
This model is used to explain ferromagnetism in a very satisfying way. It is ...
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Which pressure to use in phase diagrams? [duplicate]
I was reading up on phase diagrams and this line on Wikipedia struck me. It says that:
“The pressure on a pressure-temperature diagram (such as the water phase diagram shown above) is the partial ...
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Reconciling the Stefan model and Stefan-Boltzmann
Suppose I want to estimate how long it would take to melt a block of ice on the sun, ie: a one dimensional surface of thickness $h$ in contact with an infinite liquid heat reservoir, both at constant ...
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Which pressure should I consider during phase transition?
Suppose I have a vessel and inside of it water, saturated vapor and air. Partial pressures are $P_\text{vapor}$ and $P_{air}$. Suppose the temperature changes by $dT$ and the pressure changes by $dP$ ...
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What bounds on the possible values of critical exponents can we derive from first principles?
Consider some many-body Hamiltonian $H$- let's say classical for simplicity, e.g. the Ising model - that is parameterized by some "external" parameters $\{h_i\}$, e.g. pressure or applied ...
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Can the critical exponent $\alpha$ be greater than or equal to 1?
The critical exponent $\alpha$ describes the (non-analytic part of the) behavior of the specific heat capacity $C$ as a function of temperature near a continuous thermal phase transition: $C \sim |T - ...
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Fluctuations at the critical point: can they reach centimeter scales?
In the wikipedia article on critical opalescence, the following claim appears:
As the density fluctuations become of a size comparable to the wavelength of light, the light is scattered and causes ...
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Visibility of extremal Gibbs states / degenerate vacua in CFT?
Consider a lattice model with a continuous transition involving spontaneous symmetry breaking (SSB) $G\to H$. Near criticality, the system is typically described by a QFT which is conformal (CFT) at ...
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