While watching the production of porous membranes used for DNA sorting and sequencing, University of Illinois researchers wondered how tiny steplike defects formed during fabrication could be used to improve molecule transport. ...
Nanophysics
Aug 05, 2019
0
101
Simulations from researchers in Japan provide new insights into the reactions occurring in solid-oxide fuel cells by using realistic atomic-scale models of the active site at the electrode based on microscope observations ...
Materials Science
Jul 19, 2019
0
11
With their potential to perform calculations far beyond the reach of conventional supercomputers, machines harnessing certain quantum physics phenomena are expected to change the way the world solves complex problems. They ...
Quantum Physics
Jul 17, 2019
0
5
NUS scientists have developed a method for self-assembly of hexagonal organic porous structures on molybdenum diselenide (MoSe2) film to create ordered nanostructures.
Nanomaterials
Jul 11, 2019
0
1
A team of scientists, led by the University of Bristol, have discovered a new method that could be used to build quantum sensors with ultra-high precision.
Quantum Physics
Jul 10, 2019
0
1682
Every type of atom in the universe has a unique fingerprint: It only absorbs or emits light at the particular energies that match the allowed orbits of its electrons. That fingerprint enables scientists to identify an atom ...
Quantum Physics
Jul 04, 2019
19
12
A study from the Institute for Research in Biomedicine (IRB Barcelona) has published a study in the journal Nature Catalysis that describes the reaction mechanism used by the DNAzyme 9DB1, the first structurally available ...
Molecular & Computational Biology
Jun 20, 2019
0
0
A team of researchers from McMaster University has mapped at atomic resolution a toxic protein linked to Alzheimer's disease, allowing them to better understand what is happening deep within the brain during the earliest ...
Biochemistry
Jun 20, 2019
0
1
Scientists from the National Institute of Standards and Technology (NIST) and the University of Maryland are using neutrons at Oak Ridge National Laboratory (ORNL) to capture new information about DNA and RNA molecules and ...
General Physics
Jun 19, 2019
0
196
Phase-change materials that are used in the latest generation of smartphones could lead to higher storage capability and more energy efficiency. Data is recorded by switching between glassy and crystalline material states ...
Condensed Matter
Jun 14, 2019
0
243
In quantum mechanics, perturbation theory is a set of approximation schemes directly related to mathematical perturbation for describing a complicated quantum system in terms of a simpler one. The idea is to start with a simple system for which a mathematical solution is known, and add an additional "perturbing" Hamiltonian representing a weak disturbance to the system. If the disturbance is not too large, the various physical quantities associated with the perturbed system (e.g. its energy levels and eigenstates) can, from considerations of continuity, be expressed as 'corrections' to those of the simple system. These corrections, being 'small' compared to the size of the quantities themselves, can be calculated using approximate methods such as asymptotic series. We can therefore study the complicated system based on our knowledge of the simpler one.
This text uses material from Wikipedia, licensed under CC BY-SA
