Results 31 to 40 of about 72,650 (303)
Entropy, 2022 Quantum physics, despite its intrinsically probabilistic nature, lacks a definition of entropy fully accounting for the randomness of a quantum state. For example, von Neumann entropy quantifies only the incomplete specification of a quantum state and ...
Davi Geiger, Zvi M. Kedem
doaj +1 more source
Fluctuation, Dissipation and the Arrow of Time [PDF]
, 2011 The recent development of the theory of fluctuation relations has led to new insights into the ever-lasting question of how irreversible behavior emerges from time-reversal symmetric microscopic dynamics.
Bochkov +6 more
core +6 more sources
Irreversibility of time in general relativity [PDF]
Известия Саратовского университета. Новая серия: Физика, 2022 Background and Objectives: The equations of classical dynamics of particles and waves admit solutions with the reverse flow of time. Therefore, it is generally assumed that classical dynamics does not reflect the irreversibility of time.
Tsoy, Valery Ivanovich
doaj +1 more source
Entropy and Cosmological Arrows of Time
, 2021 Deutsch and Aguirre have recently shown that the solutions of certain dynamical systems typically contain a point of minimum size that they identify as an entropy minimum and from which the size and entropy increase to infinity in both directions of time.
openaire +2 more sources
Cosmological Time, Entropy and Infinity
Entropy, 2017 Time is a parameter playing a central role in our most fundamental modelling of natural laws. Relativity theory shows that the comparison of times measured by different clocks depends on their relative motion and on the strength of the gravitational ...
Clémentine Hauret +2 more
doaj +1 more source
Energies, 2022 Based on the square heat-generation body (HGB) with “arrow-shaped” high-thermal-conductivity channel (HTCC) model established in the previous literature, we performed multi-objective optimization (MOO) with maximum temperature difference (MTD ...
Hongwei Zhu +4 more
doaj +1 more source
Unified Arrows of Time: From Quantum Collapse to Biological Evolution through Entropy Flow
Matehkolaee, Mehdi Jafari
openalex +2 more sources
Entropy, 2019 Where was the past low-entropy of the early universe located? Contrary to some popular answers, I argue that that the dominant source of low-entropy is the fact that a single degree of freedom, the scale factor, was not at equilibrium.
Carlo Rovelli
doaj +1 more source
Maxwell’s Demon in Quantum Mechanics
Entropy, 2020 Maxwell’s Demon is a thought experiment devised by J. C. Maxwell in 1867 in order to show that the Second Law of thermodynamics is not universal, since it has a counter-example. Since the Second Law is taken by many to provide an arrow of time, the
Orly Shenker, Meir Hemmo
doaj +1 more source
Entropy, Biological Evolution and the Psychological Arrow of Time
Journal of Modern Physics, 2016 We argue that in Universes where future and past differ only by the entropy content a psychological arrow of time pointing in the direction of entropy increase can arise from natural selection in biological evolution. We show that this effect can be demonstrated in very simple toy computer simulations of evolution in an entropy increasing or decreasing
Heinrich, Torsten +2 more
openaire +3 more sources