Principle
In neural networks, computations are generally accomplished through two components: the multiplication of different input data with the same trained weights. This principle applies to both fully connected networks and convolutional…
Category: 4. Physics
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The expanding Universe — do ongoing tensions leave room for new physics?
On 1 January 1925, US astronomer Henry Norris Russell made a startling announcement to the American Astronomical Society in Washington DC: observations by fellow astronomer Edwin Hubble showed that the Milky Way did not encompass the cosmos, and…
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Vanadium dioxide enabled polarization insensitive tunable broadband terahertz metamaterial absorber
The simulation results of the absorption curve, derived from optimized structural parameters, are presented in Fig. 2, with the conductivity of VO2 set at 200,000 S/m. The figure illustrates that the absorber achieves a broadband absorption…
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Free-energy machine for combinatorial optimization
Du, D. & Pardalos, P. M. Handbook of Combinatorial Optimization vol. 4 (Springer Science & Business Media, 1998).
Arora, S. & Barak, B. Computational Complexity: A Modern Approach (Cambridge Univ. Press, 2009).
Kirkpatrick, S., Gelatt Jr, C. D. &…
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Sampling reduced density matrix to extract fine levels of entanglement spectrum and restore entanglement Hamiltonian
Method
In a quantum many-body system, the ES of a subsystem (entangling region) A with the rest of the system B (environment) is constructed via the RDM. The RDM is defined as the partial trace of the total density matrix ρ over a complete basis…
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Active membrane deformations of a minimal synthetic cell
Ofer, N., Mogilner, A. & Keren, K. Actin disassembly clock determines shape and speed of lamellipodial fragments. Proc. Natl Acad. Sci. USA 108, 20394–20399 (2011).
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Generation and manipulation of light-induced orbital transport in Co/Zr/Al2O3 heterostructure probed with ultrafast terahertz emission
Samples and experiment
We fabricated the FM/NM heterostructures with the stack of Co(2)/Zr(3-25), Co(2)/W(1)/Zr(3-20), and Co(2)/W(1-5)/Zr(3) on the c-Al2O3 (0001) single crystal substrates and protected with a 5.0-nm MgO capping layer, by using…
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Emergent continuous time crystal in dissipative quantum spin system without driving
Shapere, A. & Wilczek, F. Classical time crystals. Phys. Rev. Lett. 109, 160402 (2012).
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Wilczek, F. Quantum time crystals. Phys. Rev. Lett. 109, 160401 (2012).
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Scientists Film the Fastest Phenomena in Nature Using Ultrafast Lasers
Imagine being able to flip a material from transparent to opaque, or reshape its properties in less than a billionth of a billionth of a second. Researchers at the Weizmann Institute have developed a way to track these ultrafast changes using a…
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Predicting EMI in UAVs using characteristic mode analysis: a case study of the DJI Phantom 4
Unmanned Aerial Vehicles (UAVs) are increasingly vital across various sectors, including aerial photography, agriculture, infrastructure inspection, and search and rescue operations. Beyond these applications, UAVs represent a practical and…
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