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Search results for “Mechanics”

1,000+ results for "Mechanics"

Physicists create millimeter-sized 'Bohr atom'

Researchers at Rice University have created giant millimeter-sized atoms resembling Bohr's atomic model, with electrons behaving like classical particles for several orbits. The achievement has potential applications in next-generation computers and studying quantum chaos.

SourceRice University·JournalPhysical Review Letters·DateJun 30, 2008

Fast AFM probes measure multiple properties of biomolecules or materials simultaneously

Researchers developed novel probe technology that replaces conventional AFM cantilevers, enabling fast topographic imaging, quantitative material characterization, and single molecule mechanics measurements. These probes can simultaneously measure material properties like adhesion, stiffness, elasticity, and viscosity.

Firing photons makes advance in space communication

Researchers have successfully fired photons back and forth between a space satellite and a ground-based station, demonstrating the possibility of a secure quantum communication channel. The achievement marks an important step towards global communication via satellites using quantum mechanics.

SourceIOP Publishing·JournalNew Journal of Physics·DateMar 28, 2008

Silicon chips for optical quantum technologies

A team of physicists and engineers at the University of Bristol demonstrated control of single particles of light on a silicon chip, a crucial step towards a super-powerful quantum computer. The controlled-NOT gate, the building block of a quantum computer, was achieved with high-fidelity operation.

SourceUniversity of Bristol·JournalScience·DateMar 27, 2008

Physicists discover how fundamental particles lose track of quantum mechanical properties

Researchers at the University of California - Santa Barbara and Ames Laboratory have discovered how fundamental particles in matter lose their quantum mechanical properties through interactions with their environment. This finding is key to unraveling how the classical world emerges from interacting quantum particles in matter.

Fermions do not travel together, theory proved

Scientists have demonstrated that fermions, particles predicted by quantum mechanics to avoid close proximity, indeed exhibit an 'anti-bunching' effect, repelling each other due to quantum interferences. This finding enables the detection of correlations between atoms and advances our understanding of matter at the quantum scale.

SourceCNRS·JournalNature·DateMar 10, 2007

Artificial atoms make microwave photons countable

Using artificial atoms on a chip, Yale physicists have successfully detected and stored individual microwave photons, bringing quantum mechanics to a larger scale. This breakthrough enables the creation of new types of quantum machines that can exponentially speed up computations in cryptography, quantum physics, and chemistry.

SourceYale University·JournalNature·DateFeb 1, 2007

What is the lifetime of positronium ions?

Physicists at Max Planck have measured the lifetime of positronium ions six times more precisely than before, finding an average lifespan of almost half a nanosecond. This closely matches predicted values and provides an interesting model system for quantum mechanics.

SourceMax-Planck-Gesellschaft·JournalPhysical Review Letters·DateFeb 23, 2006

First powder injection molding process for pure niobium

The Penn State team has successfully developed a method to calculate optimal proportions of niobium powder to binder and temperature for sintering, opening doors to injection-molded niobium parts. The approach can be applied to other materials with irregularly-shaped particles, expanding its potential applications.

APS physics tip sheet #53

New research from Rice University suggests the immune system's mild inefficiency may lead to autoimmune diseases, as its mechanisms for developing antibodies could also attack healthy cells. Ancient neutrinos created in the early universe may provide evidence for or against string theory and quantum loop gravity.

SourceAmerican Physical Society·JournalPhysical Review Letters·DateSep 14, 2005

Strong new evidence of a new, supersolid, phase of matter

Researchers observe supersolid behavior in solid helium-4, where a small fraction of atoms exhibit zero friction and nonclassical rotational inertia. The discovery challenges the accepted picture of crystalline solid 4-He and forces theorists to revise their understanding of quantum mechanics.

SourcePenn State·JournalScience·DateSep 2, 2004