Results 41 to 50 of about 71,617 (299)

Wormholes and the thermodynamic arrow of time

Physical Review Research, 2020
In classical thermodynamics, heat cannot spontaneously pass from a colder system to a hotter system, which is called the thermodynamic arrow of time. However, if the initial states are entangled, the direction of the thermodynamic arrow of time may not ...
Zhuo-Yu Xian, Long Zhao
doaj   +1 more source

How many universes are necessary for an ice cream to melt? [PDF]

Serbian Astronomical Journal, 2003
We investigate a quantitative consequence of the Acausal-Anthropic approach to solving the long-standing puzzle of the thermo dynamical arrow of time.
Ćirković Milan M.
doaj   +1 more source

Does a computer have an arrow of time? [PDF]

, 2007
In [Sch05a], it is argued that Boltzmann's intuition, that the psychological arrow of time is necessarily aligned with the thermodynamic arrow, is correct.
Owen J. E. Maroney, L.S. Schulman, S.W. Hawking, L. Boltzmann, H. Reichenbach, P. Horwich, L. Sklar, J. Earman, T. Maudlin, L. Sklar, R. Landauer, S.W. Hawking, S.W. Hawking, D.Z. Albert, L.S. Schulman, H.D. Zeh, L.S. Schulman, T. Short, O.J.E. Maroney, O.J.E. Maroney, C.M. Caves, C.M. Caves, B. Piechocinska, J. Bub, C.H. Bennett, J. Earman, J.D. Norton, S. Turgut, R.C. Tolman, M.H. Partovi, B. Loewer, H. Price   +31 more
core   +1 more source

On Quantum Entropy

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
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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, Callen, Einstein, Messiah, Michele Campisi, Peter Hänggi, Stratonovich   +6 more
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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
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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, Pierre Magain, Judith Biernaux   +2 more
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Multi-Objective Constructal Design for Square Heat-Generation Body with “Arrow-Shaped” High-Thermal-Conductivity Channel

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, Lingen Chen, Yanlin Ge, Shuangshuang Shi, Huijun Feng   +4 more
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Where Was Past Low-Entropy?

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
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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