scholarly journals Higher order Bose-Einstein Correlations test the Gaussian density matrix and the space-time approach

1998 ◽  
Vol 438 (1-2) ◽  
pp. 193-202 ◽  
Author(s):  
N. Arbex ◽  
M. Plümer ◽  
R.M. Weiner
Keyword(s):  
Density Matrix ◽  
Higher Order ◽  
Space Time ◽  
Gaussian Density ◽  
Bose Einstein

scholarly journals Ground states of Bose–Einstein condensates with higher order interaction

2019 ◽  
Vol 386-387 ◽  
pp. 38-48 ◽  
Author(s):  
Weizhu Bao ◽  
Yongyong Cai ◽  
Xinran Ruan
Keyword(s):  
Ground States ◽  
Higher Order ◽  
Order Interaction ◽  
Bose Einstein

scholarly journals QUANTUM SINGULARITIES IN STATIC AND CONFORMALLY STATIC SPACE-TIMES

2011 ◽  
Vol 26 (22) ◽  
pp. 3878-3888 ◽  
Author(s):  
D. A. KONKOWSKI ◽  
T. M. HELLIWELL
Keyword(s):  
Power Law ◽  
Cosmic String ◽  
Higher Order ◽  
Space Time ◽  
Differential Invariants ◽  
Future Research ◽  
Quantum Singularities ◽  
Definition Of ◽  
Friedmann Robertson Walker ◽  
Static Space

The definition of quantum singularity is extended from static space-times to conformally static space-times. After the usual definitions of classical and quantum singularities are reviewed, examples of quantum singularities in static space-times are given. These include asymptotically power-law space-times, space-times with diverging higher-order differential invariants, and a space-time with a 2-sphere singularity. The theory behind quantum singularities in conformally static space-times is followed by an example, a Friedmann-Robertson-Walker space-time with cosmic string. The paper concludes by discussing areas of future research.

scholarly journals Colliding scalar pulses in the Einstein-Gauss-Bonnet gravity

2018 ◽  
Vol 168 ◽  
pp. 04014
Author(s):  
Hisaaki Shinkai ◽  
Takashi Torii
Keyword(s):  
Nonlinear Dynamics ◽  
Symmetric Space ◽  
Higher Order ◽  
Space Time ◽  
Large Curvature ◽  
Bonnet Gravity ◽  
Plane Symmetric ◽  
Higher Order Curvature Corrections

We numerically investigated how the nonlinear dynamics depends on the dimensionality and on the higher-order curvature corrections in the form of Gauss-Bonnet (GB) terms, with a model of colliding scalar pulses in plane-symmetric space-time. We observed that a collision of large scalar pulses will produce a large-curvature region, of which the magnitude depends on αGB. The normal corrections (αGB > 0) work for avoiding the appearance of singularity, although it is inevitable.

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