Masers can detect and amplify weak microwave signals while introducing minimal noise1. Although they have many potential applications, their usage has been limited to only a few specialised areas due to the requirement for vacuum, high magnetic…
Category: 4. Physics
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Quantum correlations of spontaneous two-photon emission from a quantum dot
Chluba, J. & Sunyaev, R. Two-photon transitions in hydrogen and cosmological recombination. Astron. Astrophys 480, 629–645 (2008).
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Brune, M., Raimond, J., Goy, P.,…
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Universal expansion of human mobility across urban scales
Gonzalez, M. C., Hidalgo, C. A. & Barabasi, A.-L. Understanding individual human mobility patterns. Nature 453, 779–782 (2008).
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Belik, V., Geisel, T. & Brockmann, D. Natural…
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Highly efficient air filter inspired by mucus-covered nasal hair
- RESEARCH BRIEFINGS
Airborne particles adhere to filters only weakly. A…
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SIC based RL for massive MIMO NOMA signal detection for different modulation schemes under diverse channel conditions
In this study, we used Matlab-2016 to estimate the performance of the proposed SIC-RL and conventional signal detectors with a Rayleigh channel. The parameters used in this study are listed in Table 3. The selected parameters ensure an accurate…
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A complexity transition in displaced Gaussian Boson sampling
D-GBS and the matching polynomial
The D-GBS problem can be visualised as the sampling of subgraphs from a graph representation of the Gaussian state, as shown in Fig. 1. Compared to regular non-displaced GBS, the addition of displacement…
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Metastability and Ostwald step rule in the crystallisation of diamond and graphite from molten carbon
Phase diagram and spontaneous crystallisation
We first discuss the phase diagram of carbon in the region of the GDL triple point (Fig. 1a). Experimentally, the triple point was initially determined at T = 4100 ± 200 K, and…
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Cavity-mediated collective emission from steady-state subradiance
Figure 1a–c compares two two-level emitters with different photonic environments under continuous incoherent excitation. For uncoupled emitters whose distance is much larger than their wavelength (\(d \; \gg \; \lambda\)) in free space, the…
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Control strategy evaluation for reactive power management in grid-connected photovoltaic systems under varying solar conditions
Solar systems are connected to the grid through inverters, which convert DC power generated by the PV panels into AC power suitable for the grid and the aim of improving the sustainability of these types of developments. Modern inverters can also…
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Radiation exposure reduction in peripheral interventions using digital variance angiography versus conventional angiography
DVA exhibits promising prospects with respect to radiation exposure and ICM in DSA. This study aimed to determine the reduction of radiation dose in EPI using series of individual image acquisitions of DSA and DUA acquisitions instead of the…
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