다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Constraints on dark matter density and axion mass from the large-scale structure of spacetime

This Year's Nobel Prize (2022) in Physics for Entanglement and Quantum Information: the New Revolution in Quantum Mechanics and Science

We discuss the recently suggested Ricci-Gauss-Bonnet holographic dark energy in Chern-Simons modified gravity. To reach a deterministic solution, some general forms of the scale factor have been tested and two physically reasonable forms have been used: A specific hyperbolic empirical form that allows the deceleration-to-acceleration cosmic transition, and the logamediate inflation form which has been proved to be consistent with observations. The pressure, density, equation of state parameter and jerk parameter have been calculated and analyzed. While both models predict a cosmic pressure that is positive during the early-time deceleration and negative during the late-time acceleration, the equation of state parameter has the same asymptotic behavior in both solutions indicating a Quintessence-dominated universe in the far future.

Ricci-Gauss-Bonnet Holographic Dark Energy in Chern-Simons Modified Gravity

The paper considers the symmetries of a bit of information corresponding to one, two or three qubits of quantum information and identifiable as the three basic symmetries of the Standard model, , and accordingly. They refer to “empty qubits” (or the free U(1), SU(2) SU(3) variable of quantum information), i.e. those in which no point is chosen (recorded). The choice of a certain point, i.e the certain coefficients of superposition in any (α, β ∈ C: α | | + β | | = 1) qubit violates those symmetries. It can be represented furthermore as the choice of (α|0⟩ + β|1⟩), a privileged reference frame (e.g. that of the Big Bang), which can be described exhaustively by means of 16 numbers (4 for position, 4 for velocity, and 8 for acceleration) independently of time, but in space-time continuum, and still one, 17th number is necessary for the mass of rest of the observer in it. The same 17 numbers describing exhaustively a privileged reference frame thus granted to be “zero”, respectively a certain violation of all the three symmetries of the Standard model or the “record” in a qubit in general, can be represented as 17 elementary wave functions (or classes of wave functions) after the bijection of natural and transfinite natural (ordinal) numbers in Hilbert arithmetic and further identified as those corresponding to the 17 elementary of particles of the Standard model. Two generalizations of the relevant concepts of general relativity are introduced: (1) “discrete reference frame” to the class of all arbitrarily accelerated reference frame constituting a smooth manifold; (2) a still more general principle of relativity to the general principle of relativity, and meaning the conservation of quantum information as to all discrete reference frames as to the smooth manifold of all reference frames of general relativity. Then, the bijective transition from an accelerated reference frame to the 17 elementary wave functions of the Standard model can be interpreted by the still more general principle of relativity as the equivalent redescription of a privileged reference frame: smooth into a discrete one. The conservation of quantum information related to the generalization of the concept of reference frame can be interpreted as restoring the concept of the ether, an absolutely immovable medium and reference frame in Newtonian mechanics, to which the relative motion can be interpreted as an absolute one, or logically: the relations, as properties. The new ether is to consist of qubits (or quantum information). One can track the conceptual pathway of the “ether” from Newtonian mechanics via special relativity, via general relativity, via quantum mechanics to the theory of quantum information (or “quantum mechanics and information”). The identification of entanglement and gravity can be considered also as a ‘byproduct” implied by the transition from the smooth “ether of special and general relativity’ to the “flat” ether of quantum mechanics and information. The qubit ether is out of the “temporal screen” in general and is depicted on it as both matter and energy, both dark and visible.

https://www.preprints.org/manuscript/202106.0197/v1/download

The Symmetries of Quantum and Classical Information. The Ressurected “Ether" of Quantum Information

In this paper, we study the possibility of obtaining a stable flat dark energy-dominated universe in a good agreement with observations in the framework of Swiss-cheese brane-world cosmology. Two d...

The possibility of a stable flat dark energy-dominated Swiss-cheese brane-world universe

https://www.tandfonline.com/doi/pdf/10.1080/16583655.2019.1660086

On total edge irregularity strength of polar grid graph

Computing the total edge irregularity strength for quintet snake graph and related graphs

In this paper, we study the possibility of obtaining a stable flat dark energy-dominated universe in a good agreement with observations in the framework of Swiss-cheese Brane-world cosmology. Two different Brane-world cosmologies with black strings have been introduced for any cosmological constant $\Lambda$ using two empirical forms of the scale factor. In both models, we have performed a fine-tuning between the brane tension and the cosmological constant so that the EoS parameter $\omega(t)\rightarrow -1$ for the current epoch where the redshift $z\simeq 0$. We then used these fine-tuned values to calculate and plot all parameters and energy conditions. The deceleration-acceleration cosmic transition is allowed in both models, and the jerk parameter $j\rightarrow 1$ at late-times. Both solutions predict a future dark energy-dominated universe in which $\omega=-1$ with no crossing to the phantom divide line. While the pressure in the first solution is always negative, the second solution predicts a better behavior of cosmic pressure where the pressure is negative only in the late-time accelerating era but positive in the early-time decelerating era. Since black strings have been proved to be unstable by some authors, this instability can actually reflect doubts on the stability of cosmological models with black strings (Swiss-cheese type brane-worlds cosmological models). For this reason, we have carefully investigated the stability through energy conditions and sound speed. Because of the presence of quadratic energy terms in Swiss-cheese type brane-world cosmology, we have tested the new nonlinear energy conditions in addition to the classical energy conditions. We have also found that constructing non-singular and cyclic solutions through certain ansatze in Swiss-cheese Brane-worlds are not possible.

The possibility of a stable flat dark energy-dominated Swiss-cheese Brane-world universe with a deceleration-acceleration transition.

Difference of General- Graphs and its Corresponding Matrices

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