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2017 ; 7
(ä): 46736
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Solitonic Josephson-based meminductive systems
#MMPMID28436490
Guarcello C
; Solinas P
; Di Ventra M
; Giazotto F
Sci Rep
2017[Apr]; 7
(ä): 46736
PMID28436490
show ga
Memristors, memcapacitors, and meminductors represent an innovative generation of
circuit elements whose properties depend on the state and history of the system.
The hysteretic behavior of one of their constituent variables, is their
distinctive fingerprint. This feature endows them with the ability to store and
process information on the same physical location, a property that is expected to
benefit many applications ranging from unconventional computing to adaptive
electronics to robotics. Therefore, it is important to find appropriate memory
elements that combine a wide range of memory states, long memory retention times,
and protection against unavoidable noise. Although several physical systems
belong to the general class of memelements, few of them combine these important
physical features in a single component. Here, we demonstrate theoretically a
superconducting memory based on solitonic long Josephson junctions. Moreover,
since solitons are at the core of its operation, this system provides an
intrinsic topological protection against external perturbations. We show that the
Josephson critical current behaves hysteretically as an external magnetic field
is properly swept. Accordingly, long Josephson junctions can be used as
multi-state memories, with a controllable number of available states, and in
other emerging areas such as memcomputing, i.e., computing directly in/by the
memory.