Results 31 to 40 of about 205,186 (270)

Hilbert space structure of covariant loop quantum gravity

, 2002
We investigate the Hilbert space in the Lorentz covariant approach to loop quantum gravity. We restrict ourselves to the space where all area operators are simultaneously diagonalizable, assuming that it exists. In this sector quantum states are realized
A. Ashtekar, A. Ashtekar, A. Ashtekar and, A. Ashtekar and, A. Perez, A. Perez, C. Rovelli, C. Rovelli, D. Oriti, G. Immirzi, J. F. Barbero, J. F. Barbero, J. F. Barbero, J. F. Barbero, J. Samuel, J. Samuel, J. W. Barrett, M. A. Naimark, M. Bojowald, M. Bojowald, M. Bojowald, M. Bojowald, R. E. Livine, R. L. Anderson, S. Alexandrov, S. Alexandrov, S. Alexandrov, S. Frittelli, S. Yu. Alexandrov, Sergei Alexandrov, T. Thiemann, T. Thiemann   +31 more
core   +1 more source

Bilinear Multipliers of Weighted Lorentz Spaces and Variable Exponent Lorentz Spaces [PDF]

Mathematics and Statistics, 2017
Let ω1, ω2 be slowly increasing functions and let ω3 be weight function on ℝn. In section 2 we define a bilinear multiplier from L(p1, q1, ω1dμ) (ℝn) × L(p2, q2, ω2dμ) (ℝn) to L(p3, q3, ω3dμ) (ℝn) by a bounded operator Bm, where 1≤ p1, p2, p3, q1, q2, q3 < ∞ and m (ξ,η) is a bounded, measurable function on ℝn × ℝn.
Öznur Kulak, A. Turan Gürkanlı
openaire   +1 more source

Extended Non Linear Conformal Symmetry and DSR Velocities on the Physical Surface

, 2004
The relation between Conformal generators and Magueijo Smolin Deformed Special Relativity term, added to Lorentz boosts, is achieved. The same is performed for Fock Lorentz transformations.
CARLOS LEIVA, Smith S. P.
core   +1 more source

T-Duality For String in Horava-Lifshitz Gravity

, 2010
We continue our study of the Lorentz breaking string theories. These theories are defined as string theory with modified Hamiltonian constraint which breaks the Lorentz symmetry of target space-time.
C. Germani, D. Blas, E. Bergshoeff, E. Kiritsis, E.O. Colgain, G. Calcagni, H. Lu, J. Kluson, J. Klusoň, J.C. Breckenridge, Kamal L. Panigrahi, M. Chaichian, M. Li, M. Sakamoto, M. Visser, M.I. Park, P. Horava, P. Horava, R. Brandenberger, R.G. Cai, S. Carloni, S. Mukohyama, S. Mukohyama, S. Mukohyama, S. Mukohyama, S. Nojiri, T. Takahashi, T.H. Buscher, T.H. Buscher, T.H. Buscher, T.P. Sotiriou, T.P. Sotiriou   +31 more
core   +1 more source

Three‐Dimensional Hierarchical Nanowire‐Networks with Deep‐Focus Tolerance and Adhesion Robustness for Harsh‐Environment SERS Sensing

Advanced Functional Materials, EarlyView.
A 3D nanowire‐network SERS substrate with robust adhesion is developed, featuring pronounced z‐direction optical activity, ultralow detection limit (1.5 × 10−13 M), and excellent signal uniformity (RSD < 10%). Enabled by enhanced light scattering, increased optical density of states, and structural reinforcement, the substrate demonstrates stable, high‐
Jinglai Duan, Wentao Wang, Xiu Liang, Yongliang Zhang, Jie Liu, Yu Bai, Dangyuan Lei   +6 more
wiley   +1 more source

Matlab Applications for Skew-Symmetric Matrices and Integral Curves in Lorentzian Spaces

Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2017
In [8], the authors obtained the non-zero solutions of the equation A(x)=0, in Lorentzian space where A is a skew-symmetric matrix corresponding to the linear map A and got normal forms of the skew-symmetric matrix A, depending on the causal characters ...
Tuhahan Turhan, Y.Emre Göktepe, Nihat Ayyıldız   +2 more
doaj   +2 more sources

Minimal Lorentz Surfaces in Pseudo-Euclidean 4-Space with Neutral Metric

, 2018
We study minimal Lorentz surfaces in the pseudo-Euclidean 4-space with neutral metric whose first normal space is two-dimensional and whose Gauss curvature $K$ and normal curvature $\varkappa$ satisfy the inequality $K^2-\varkappa^2 >0$. Such surfaces we
Aleksieva, Yana, Milousheva, Velichka
core   +1 more source

Magnetic Force Microscopy Signatures of Higher‐Order Skyrmions and Antiskyrmions

Advanced Functional Materials, EarlyView.
Magnetic force microscopy operated under vacuum conditions enables the qualitative identification of higher‐order skyrmions and antiskyrmions in Co/Ni multilayers at room temperature. Distinct stray‐field contrast signatures arise from vertical Bloch lines and complex domain‐wall configurations.
Sabri Koraltan, Joe Sunny, Tamer Karaman, Reshma Peremadathil‐Pradeep, Emily Darwin, Felix Büttner, Dieter Suess, Hans Josef Hug, Manfred Albrecht   +8 more
wiley   +1 more source

Why do spacecraft always experience a black-out area that disrupts communications when they return to Earth?

ScienceOpen Research
In this paper, Lorentz factor and Lorentz transformations are modified based on the new aether theory, and the blackout which leads to communication interruption of high-speed moving objects is analyzed by using the modified Lorentz electromagnetic field
Jian’an Wang
doaj   +1 more source

Lorentz Symmetry Violation of Cosmic Photons

Universe, 2022
As a basic symmetry of space-time, Lorentz symmetry has played important roles in various fields of physics, and it is a glamorous question whether Lorentz symmetry breaks.
Ping He, Bo-Qiang Ma
doaj   +1 more source