Results 41 to 50 of about 68,867 (287)

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

Gravitational Entropy and Inflation

Entropy, 2013
The main topic of this paper is a description of the generation of entropy at the end of the inflationary era. As a generalization of the present standard model of the Universe dominated by pressureless dust and a Lorentz invariant vacuum energy (LIVE ...
Øystein Elgarøy, Øyvind Grøn
doaj   +1 more source

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

Arrow(s) of Time without a Past Hypothesis [PDF]

, 2019
The paper discusses recent proposals by Carroll and Chen, as well as Barbour, Koslowski, and Mercati to explain the (thermodynamic) arrow of time without a Past Hypothesis, i.e., the assumption of a special (low-entropy) initial state of the universe ...
Lazarovici, Dustin, Reichert, Paula
core   +3 more sources

The arrow of time of brain signals in cognition: Potential intriguing role of parts of the default mode network

Network Neuroscience, 2022
A promising idea in human cognitive neuroscience is that the default mode network (DMN) is responsible for coordinating the recruitment and scheduling of networks for computing and solving task-specific cognitive problems.
G. Deco, Y. Perl, L. Fuente, Jacobo D. Sitt, B. Yeo, E. Tagliazucchi, M. Kringelbach, Network Neuroscience   +7 more
semanticscholar   +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
doaj   +1 more source

Irreversibility of time in general relativity [PDF]

Известия Саратовского университета. Новая серия 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

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

Decomposing the Local Arrow of Time in the Brain

Physics, 2022
A broken egg cannot spontaneously unbreak, and a drop of ink once mixed in water cannot spontaneously unmix. Nature is full of such irreversible phenomena, actions that cannot undo themselves.
Y. Roudi, J. Hertz
semanticscholar   +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