Time, Irreversibility and Entropy Production in Nonequilibrium Systems

Lucia, Umberto; Grisolia, Giulia; Kuzemsky, A. L.

doi:10.3390/e22080887

Cited by 34 publications

(34 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The link between nonequilibrium temperature and the characteristic time imply that nonequilibrium temperature is related to the universal computation and the ubiquitous 1/ν phenomena [95,96]. Therefore, we agree with the results of Chua et al, who proved that there exists a fundamental relationship between universal computation and the ubiquitous 1/ν phenomena [97].…”

Section: Resultssupporting

confidence: 92%

Nonequilibrium Temperature: An Approach from Irreversibility

Lucia

Grisolia

2021

Materials

Self Cite

View full text Add to dashboard Cite

Nonequilibrium temperature is a topic of research with continuously growing interest because of recent improvements in and applications of nonequilibrium thermodynamics, with particular regard to information theory, kinetic theory, nonequilibrium molecular dynamics, superfluids, radiative systems, etc. All studies on nonequilibrium temperature have pointed out that the definition of nonequilibrium temperature must be related to different aspects of the system, to the energy of the system, and to the energy fluxes between the system and its environment. In this paper, we introduce a definition of nonequilibrium temperature based on the Gouy–Stodola and Carnot theorems in order to satisfy all these theoretical requirements. The result obtained links nonequilibrium temperature to the electromagnetic outflow, generated by irreversibility during microscopic interaction in the system; to the environmental temperature; to the mean energy; and to the geometrical and physical characteristics of the system.

show abstract

Section: Resultssupporting

confidence: 92%

Nonequilibrium Temperature: An Approach from Irreversibility

Lucia

Grisolia

2021

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thinking about a thermodynamic system from the point of view of a landscape (or a manifold) brings us closer to develop a theoretical approach in quantifying emergent order in non-equilibrium steady-states where local equilibrium is satisfied [29,28,58]. Being able to define a steady-state nonequilibrium state variable precisely, allows us the freedom to quantify entropy production due to heat fluxes and calculate thermodynamic forces [59,60,61,33,62]. The validity of the current work also sets the stage to apply variational methods to describe the evolution of non-equilibrium steady-states, study bistability, bifurcation, and test the MEPP in Rayleigh-Bénard and other prototypical irreversible systems [10,63,64,65].…”

Section: Discussionmentioning

confidence: 99%

Coexisting Ordered States, Local Equilibrium-like Domains, and Broken Ergodicity in a Non-turbulent Rayleigh-Bénard Convection at Steady-state

Chatterjee

Yadati

Mears

et al. 2019

Sci Rep

View full text Add to dashboard Cite

A challenge in fundamental physics and especially in thermodynamics is to understand emergent order in far-from-equilibrium systems. While at equilibrium, temperature plays the role of a key thermodynamic variable whose uniformity in space and time defines the equilibrium state the system is in, this is not the case in a far-from-equilibrium driven system. When energy flows through a finite system at steady-state, temperature takes on a time-independent but spatially varying character. In this study, the convection patterns of a Rayleigh-Bénard fluid cell at steady-state is used as a prototype system where the temperature profile and fluctuations are measured spatio-temporally. The thermal data is obtained by performing high-resolution real-time infrared calorimetry on the convection system as it is first driven out-of-equilibrium when the power is applied, achieves steady-state, and then as it gradually relaxes back to room temperature equilibrium when the power is removed. Our study provides new experimental data on the non-trivial nature of thermal fluctuations when stable complex convective structures emerge. The thermal analysis of these convective cells at steady-state further yield local equilibrium-like statistics. In conclusion, these results correlate the spatial ordering of the convective cells with the evolution of the system’s temperature manifold.

show abstract

“…To let time go [ 31 , 32 , 33 , 34 ] and replace its function by a causality principle is a difficult task apparently, but to the authors it is a much easier task than to let go of causality. However, further elaborations on the concept of causality both at the mathematical [ 35 , 36 ] and physical level [ 1 , 23 , 37 ] and the link to the macroscopic arrow of time [ 18 , 38 , 39 , 40 , 41 , 42 ] are indicated to be key for a further development of fundamental physical theories. With the introduction of causality introduced here, time can only be reconstructed as a discrete entity also yielding other consequences from entropy [ 16 , 18 , 38 ] to the evolution of the universe [ 43 ] and many other findings [ 44 , 45 , 46 , 47 , 48 ], and thus opening more avenues to be studied.…”

Section: Discussionmentioning

confidence: 99%

Causality in Discrete Time Physics Derived from Maupertuis Reduced Action Principle

Riek

Chatterjee

2021

Entropy

View full text Add to dashboard Cite

Causality describes the process and consequences from an action: a cause has an effect. Causality is preserved in classical physics as well as in special and general theories of relativity. Surprisingly, causality as a relationship between the cause and its effect is in neither of these theories considered a law or a principle. Its existence in physics has even been challenged by prominent opponents in part due to the time symmetric nature of the physical laws. With the use of the reduced action and the least action principle of Maupertuis along with a discrete dynamical time physics yielding an arrow of time, causality is defined as the partial spatial derivative of the reduced action and as such is position- and momentum-dependent and requests the presence of space. With this definition the system evolves from one step to the next without the need of time, while (discrete) time can be reconstructed.

show abstract

Time, Irreversibility and Entropy Production in Nonequilibrium Systems

Cited by 34 publications

References 61 publications

Nonequilibrium Temperature: An Approach from Irreversibility

Nonequilibrium Temperature: An Approach from Irreversibility

Coexisting Ordered States, Local Equilibrium-like Domains, and Broken Ergodicity in a Non-turbulent Rayleigh-Bénard Convection at Steady-state

Causality in Discrete Time Physics Derived from Maupertuis Reduced Action Principle

Contact Info

Product

Resources

About