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On the Arrow of Time  [PDF]
Tsao Chang, Peng Zhang, Kangjia Liao
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.58069

The arrow of time is one of the most difficult questions in modern physics. In this paper, a damping vibration equation is discussed, which shows that this equation reflects the arrow of time. We have further discussed that the concept of “the arrow of time” in this equation is quite different from the thermodynamic arrow.

How a Minimum Time Step Leads to a Causal Structure Used to Form Initial Entropy Production and High Frequency Gravitons, with 7 Subsequent Open Questions  [PDF]
Andrew Walcott Beckwith
Journal of High Energy Physics, Gravitation and Cosmology (JHEPGC) , 2017, DOI: 10.4236/jhepgc.2017.33038
Abstract: We start where we use an inflaton value due to use of a scale factor \"\" . Also we use \"\" as the variation of the time component of the metric tensor in Pre-Planckian Space-time up to the Planckian spacetime initial values. In doing so, we come up with a polynomial expression for a minimum time step; we can call which leads to a development of the arrow of time. We show an inter relationship between the formation of the Arrow of time, and Causal structure, assuming the setting of H = 0 in the Friedman equation This in turn leads to entropy production at the start of causal structure in the onset of inflation. This then leads to three and a quarter pages of 7 open questions we think have to be answered, subsequently. It is noted that high frequency gravitational waves as specified are due to the 1/delta t entry in Equation (45) of the document which comes out to about 44 Hertz, and certainly is high frequency gravitational waves for the initial cosmological conditions, so this is definitely about high frequency gravitational wave focused initial conditions.
On the Arrow of Time  [PDF]
Y. Charles Li,Hong Yang
Physics , 2010,
Abstract: We believe the following three ingredients are enough to explain the mystery of the arrow of time: (1). equations of dynamics of gas molecules, (2). chaotic instabilities of the equations of dynamics, (3). unavoidable perturbations to the gas molecules. The level of physical rigor or mathematical rigor that can be reached for such a theory is unclear.
Modeling Time’s Arrow  [PDF]
Vishnu Jejjala,Michael Kavic,Djordje Minic,Chia-Hsiung Tze
Entropy , 2012, DOI: 10.3390/e14040614
Abstract: Quantum gravity, the initial low entropy state of the Universe, and the problem of time are interlocking puzzles. In this article, we address the origin of the arrow of time from a cosmological perspective motivated by a novel approach to quantum gravitation. Our proposal is based on a quantum counterpart of the equivalence principle, a general covariance of the dynamical phase space. We discuss how the nonlinear dynamics of such a system provides a natural description for cosmological evolution in the early Universe. We also underscore connections between the proposed non-perturbative quantum gravity model and fundamental questions in non-equilibrium statistical physics.
On The Arrow of Time  [PDF]
Lucian M. Ionescu
Physics , 2007,
Abstract: The interface between classical physics and quantum physics is explained from the point of view of quantum information theory (Feynman Processes). The interpretation depends on a hefty sacrifice: the classical determinism or the arrow of time. The wave-particle duality steams from the qubit model, as the root of creation and annihilation of possibilities. A few key experiments are briefly reviewed from the above perspective: quantum erasure, delayed-choice and wave-particle correlation. The CPT-Theorem is interpreted in the framework of categories with duality and a timeless interpretation of the Feynman Processes is proposed. A connection between the fine-structure constant and algebraic number theory is suggested.
Information and the arrow of time  [PDF]
Marcin Ostrowski
Physics , 2011,
Abstract: This paper is a discussion about the relationship between time and information. We argue that the direction of arrow of time is related to the directivity of information copying that occurs in Nature.
A Microscopic Liouville Arrow of Time  [PDF]
John Ellis,N. E. Mavromatos,D. V. Nanopoulos
Physics , 1998, DOI: 10.1016/S0960-0779(98)00152-0
Abstract: We discuss the treatment of quantum-gravitational fluctuations in the space-time background as an `environment', using the formalism for open quantum-mechanical systems, which leads to a microscopic arrow of time. After reviewing briefly the open-system formalism, and the motivations for treating quantum gravity as an `environment', we present an example from general relativity and a general framework based on non-critical strings, with a Liouville field that we identify with time. We illustrate this approach with calculations in the contexts of two-dimensional models and $D$ branes. Finally, some prospects for observational tests of these ideas are mentioned.
The arrow of time and the nature of spacetime  [PDF]
George F R Ellis
Physics , 2013,
Abstract: This paper extends the work of a previous paper [arXiv:1208.2611] on the flow of time, to consider the origin of the arrow of time. It proposes that a `past condition' cascades down from cosmological to micro scales, being realized in many microstructures and setting the arrow of time at the quantum level by top-down causation. This physics arrow of time then propagates up, through underlying emergence of higher level structures, to geology, astronomy, engineering, and biology. The appropriate space-time picture to view all this is an emergent block universe (`EBU'), that recognizes the way the present is different from both the past and the future. This essential difference is the ultimate reason the arrow of time has to be the way it is.
Isotropic phase squeezing and the arrow of time  [PDF]
G. M. D'Ariano,C. Macchiavello,P. Perinotti,M. F. Sacchi
Physics , 2000, DOI: 10.1016/S0375-9601(00)00192-4
Abstract: We prove that isotropic squeezing of the phase is equivalent to reversing the arrow of time.
The direction of time: from the global arrow to the local arrow  [PDF]
Mario Castagnino,Luis Lara,Olimpia Lombardi
Physics , 2003, DOI: 10.1023/B:IJTP.0000005970.73704.91
Abstract: In this paper we discuss the traditional approaches to the problem of the arrow of time. On the basis of this discussion we adopt a global and non-entropic approach, according to which the arrow of time has a global origin and is an intrinsic, geometrical feature of space-time. Finally, we show how the global arrow is translated into local terms as a local time-asymmetric flux of energy
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