The Stochastic Processing Unit
We now introduce our stochastic processing unit (SPU), which is depicted in the left panel of Fig. 1. The SPU is constructed on a Printed Circuit Board. From the lower left corner to the upper right corner, one can…
Category: 4. Physics
-
Solving perfect matchings by frequency-grouped multi-photon events using a silicon chip
Theoretical description
Broadband photon-pair source can be realized by χ(2) nonlinear processes such as spontaneous parametric down-conversion, or χ(3) nonlinear process such as spontaneous four-wave mixing(SFWM). We take SFWM on the silicon…
Continue Reading
-
Tunable fractional Chern insulators in rhombohedral graphene superlattices
Regnault, N. & Bernevig, B. A. Fractional Chern insulator. Phys. Rev. X 1, 021014 (2011).
Sheng, D. N., Gu, Z. C., Sun, K. & Sheng, L. Fractional quantum Hall effect in the absence of Landau…
Continue Reading
-
Characterizing G-type antiferromagnetism quantitatively with optical second harmonic generation
Antiferromagnetic-paramagnetic phase transition probed in BFO films
The G-type antiferromagnetic order in BFO films gradually weakens as temperature increases and is destroyed eventually at \({T}_{{\rm{N}}}\), leading to a magnetic phase…
Continue Reading
-
Optimizing positron emission tomography for accurate plant imaging using Monte Carlo simulations to correct positron range effects
Validation of the Siemens biograph vision PET/CT system
The validation process of the Biograph Vision Pixelated crystal was conducted in adherence to the rigorous NEMA protocol. This involved a comprehensive evaluation through calculations,…
Continue Reading
-
Control of ferroelectric polarization in BiFeO3 bilayer films through interface engineering
Design and synthesis of BiFeO3/SrTiO3/BiFeO3 multilayers
As schematically shown in Fig. 1, two types of BFO/STO/BFO were designed and grown on single-crystalline STO (001) substrates by pulsed laser deposition. The bottom and top BFO layers were…
Continue Reading
-
Machine learning driven design and optimization of a compact dual Port CPW fed UWB MIMO antenna for wireless communication
Ranjan, P., Maurya, A., Gupta, H., Yadav, S. & Sharma, A. Ultrawideband CPW fed band-notched monopole antenna optimization using machine learning. Progress Electromagnet. Res. M. 108, 27–38. https://doi.org/10.2528/PIERM21122802 (2022).
Continue Reading
-
Carroll–Schrödinger equation as the ultra-relativistic limit of the tachyon equation
In this section, we introduce the “Carroll–Schrödinger algebra” in two spacetime dimensions, including both finite-dimensional and infinite-dimensional extensions.
Finite-dimensional extension
The Carroll algebra in \(1+1\) dimensions,…
Continue Reading
-
High precision control moment gyroscope fault diagnosis via joint attention mechanism
In this section, the CMG dataset is introduced. Through experiments, the effectiveness and superiority of the proposed model are demonstrated. The experiment was conducted using Python 3.8 with PyTorch 2.4.1 on a computer running the Windows 10…
Continue Reading
-
It’s a quantum zoo out there, and scientists just found a dozen new ‘species’
There are a seemingly endless number of quantum states that describe quantum matter and the strange phenomena that emerge when large numbers of electrons interact. For decades, many of these states have been theoretical: mathematical and…
Continue Reading