Modeling the polarization dynamics of emitted photons in ultrastrong electromagnetic fields
The polarization of a photon emitted by an electron is determined at the moment of its generation by the spin- and polarization-resolved radiation…
Category: 4. Physics
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High-temperature mid-wavelength infrared avalanche photodiode with modified fully-depleted absorption and multiplication region
Device and design
The specific structural details of the heterostructure MFDAM APD is illustrated in Fig. 1a. Processes of the material growth and device fabrication are provided in the Sec. “Methods”. In contrast to the SACM structure…
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Harnessing quantum entanglement and heat current of a non-equilibrium spin system at high temperatures
We now present numerical results for the dynamics of entanglement and heat current between the qubits for various initial two-qubit states in both the symmetric qubit-bath \((\varepsilon =0)\) and asymmetric qubit-bath \((\varepsilon =1)\)…
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Dephasing and error dynamics affecting a singlet-triplet qubit during coherent spin shuttling
Coherent spin transfer
Two established approaches for spin shuttling are conveyor mode25,35,36 and bucket brigade mode3,17,18,26,37,38. Shuttling in this work is accomplished by a barrier pulse-assisted bucket brigade mode, in which we leverage…
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Astroparticle physics: Neutrinos weigh less than 0.45 electronvolts
The international KArlsruhe TRItium Neutrino Experiment (KATRIN) at the Karlsruhe Institute of Technology (KIT) has once again surpassed its own achievements. The latest data establish an upper limit of 0.45 eV/c2 (equivalent to 8 x 10-37…
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Maximal entanglement sheds new light on particle creation
Physicists at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory and Stony Brook University (SBU) have shown that particles produced in collimated sprays called jets retain information about their origins in subatomic particle…
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Scientists observe exotic quantum phase once thought impossible
A team of Rice University researchers reported the first direct observation of a surprising quantum phenomenon predicted over half a century ago, opening pathways for revolutionary applications in quantum computing, communication and sensing.
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KATRIN Physicists Measure Upper Mass Limit of Neutrino
Physicists with the KArlsruhe TRItium Neutrino (KATRIN) experiment report the most precise measurement of the upper mass limit of the neutrino to date, establishing it as 0.45 electron volts (eV) — less than one-millionth the mass of an…
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This Self-Shaping Liquid Defies Thermodynamics – And Always Rebuilds Its Form
In a surprising twist, a graduate student at UMass Amherst discovered a strange new fluid behavior that seems to defy thermodynamics. While experimenting with oil, water, and magnetized nickel particles, he found that no matter how hard the…
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Breaking a century-old physics barrier: perfect wave trapping with simple cylinders
A joint research team from POSTECH (Pohang University of Science and Technology) and Jeonbuk National University has successfully demonstrated the complete confinement of mechanical waves within a single resonator — something long thought to be…