Authors: George Rajna
Entangled photons generated by a spaceborne quantum source could enable hack-proof key exchange for ultra high security applications.  These qubits are based on silicon carbide in which molybdenum impurities create color centers.  Scientists at Radboud University discovered a new mechanism for magnetic storage of information in the smallest unit of matter: a single atom.  One of these are single-atom magnets: storage devices consisting of individual atoms stuck ("adsorbed") on a surface, each atom able to store a single bit of data that can be written and read using quantum mechanics.  Physicists have experimentally demonstrated 18-qubit entanglement, which is the largest entangled state achieved so far with individual control of each qubit.  University of Adelaide-led research has moved the world one step closer to reliable, high-performance quantum computing.  A team of researchers with members from IBM Research-Zurich and RWTH Aachen University has announced the development of a new PCM (phase change memory) design that offers miniaturized memory cell volume down to three nanometers.  Monatomic glassy antimony might be used as a new type of single-element phase change memory.  Physicists have designed a 3-D quantum memory that addresses the tradeoff between achieving long storage times and fast readout times, while at the same time maintaining a compact form.  Quantum memories are devices that can store quantum information for a later time, which are usually implemented by storing and re-emitting photons with certain quantum states.  The researchers engineered diamond strings that can be tuned to quiet a qubit's environment and improve memory from tens to several hundred nanoseconds, enough time to do many operations on a quantum chip. 
Comments: 34 Pages.
[v1] 2018-10-01 08:06:15
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