Ultralight dark matter (ULDM) is usually taken to be a single scalar field. Here we explore the possibility that ULDM consists of $N$ light fields with only gravitational interactions. This configuration more consistent underlying particle physics motivations for these scenarios than ultralight halos have characteristic granular structure increases stellar velocity dispersion and can used as ob...

Conventional lore from Tremaine and Gunn excludes fermionic dark matter lighter than a few hundred eV, based on the Pauli exclusion principle. We highlight simple way of evading this bound with large number species that leads to numerous nontrivial consequences. In scenario there are many distinct fermions quasidegenerate masses no couplings standard model. Nonetheless, gravitational interactio...

this paper proposes a low voltage (±0.55v supply voltage) low power (44.65µw) high common mode rejection ratio (cmrr) differential amplifier (d.a.) with rail to rail input common mode range (icmr), constant transconductance (gm) and enhanced frequency performance. its high performance is obtained using a simple negative averaging method so that it cancels out the common mode input signals at th...

If a global chiral symmetry is explicitly broken by anomalies in nonabelian gauge theories, a pseudo Nambu-Goldstone boson (axion) associated with a spontaneous breakdown of such a global symmetry acquires a mass through nonperturbative instanton effects. We calculate the axion mass assuming a supersymmetric SU(2) gauge theory and show that the axion obtains an extremely small mass when the SU(...

This paper presents an affordable, fully automated and accurate mapping solutions based on ultralight UAV imagery. Several datasets are analyzed and their accuracy is estimated. We show that the accuracy highly depends on the ground resolution (flying height) of the input imagery. When chosen appropriately this mapping solution can compete with traditional mapping solutions that capture fewer h...

In this paper we point out that the cosmological baryon asymmetry in our universe is generated almost independently of the reheating temperature TR in Affleck-Dine leptogenesis and it is determined mainly by the mass of the lightest neutrino, mν1, in a wide range of the reheating temperature TR ≃ 105–1012 GeV. The present baryon asymmetry predicts the mν1 in a narrow region, mν1 ≃ (0.3– 1) × 10...