Mechanics has had enormous success in explaining many of the features of our the individual behaviour of the subatomic particles that make up all forms of matter—electrons, protons, neutrons, photons and others—can often only be satisfactorily described using quantum quantum mechanics has strongly influenced string theory, a candidate for a theory of everything (see reductionism) and the multiverse it is also related to statistical quantum mechanics is important for understanding how individual atoms combine covalently to form chemicals or the application of quantum mechanics to chemistry is known as quantum (relativistic) quantum mechanics can in principle mathematically describe most of quantum mechanics can provide quantitative insight into ionic and covalent bonding processes by explicitly showing which molecules are energetically favorable to which others, and by approximately how of the calculations performed in computational chemistry rely on quantum much of modern technology operates at a scale where quantum effects are examples include the laser, the transistor (and thus the microchip), the electron microscope, and magnetic resonance the study of semiconductors led to the invention of the diode and the transistor, which are indispensable for modern researchers are currently seeking robust methods of directly manipulating quantum efforts are being made to develop quantum cryptography, which will allow guaranteed secure transmission of a more distant goal is the development of quantum computers, which are expected to perform certain computational tasks exponentially faster than classical another active research topic is quantum teleportation, which deals with techniques to transmit quantum states over arbitrary many devices, even the simple light switch, quantum tunneling is vital, as otherwise the electrons in the electric current could not penetrate the potential barrier made up, in the case of the light switch, of a layer of flash memory chips found in usb drives also use quantum tunneling to erase their memory mechanics (qm) is a set of principles describing the physical reality at the atomic level of matter (molecules and atoms) and the subatomic (electrons, protons, and even smaller these descriptions include the simultaneous wave-like and particle-like behavior of both matter and radiation ("waveparticle in the quantum mechanics of a subatomic particle, one can never specify its state, such as its simultaneous location and velocity, with complete certainty (this is called the heisenberg uncertainty principle — see its formula in the box to the certain systems, however, do exhibit quantum mechanical effects on a larger scale; superfluidity (the frictionless flow of a liquid at temperatures near absolute zero) is one well-known
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