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Shielded Quantum Bits Enhance Quantum Processing

Shielded Quantum Bits Enhance Quantum Processing

Researchers from University of Konstanz developed a novel concept to enhance quantum computing

A team of researchers from University of Konstanz developed a theoretical concept to realize quantum information processing. The team also found ways to protect electric and magnetic noise for a short time, which is expected to facilitate use of electron spins as memory for quantum computers. This is attributed to extended coherence time and several computer operations can be performed during this interval.

Development of quantum computer is majorly based on spin quantum bits or qubits and their magnetic properties. Qubits must be uniform to use spins as memory in quantum technology as random alignment of qubits cannot be controlled specifically. Magnets are controlled by magnetic fields, however, quantum particles are extremely small and their magnetic field is very weak. This in turn is challenging to control the spins and the magnetic field. Researchers use electric fields and a procedure in which several electrons form a quantum bit. Moreover, electron spins are sensitive and fragile and even in solid bodies of silicon these spins react to external interferences with electric or magnetic noise.

The current research focuses on theoretical models and calculations that detail methods to protect quantum bits from such external interferences. Shielding the noise for even the briefest of times can facilitate several computer operations to be carried out in fractions of a second. The researchers are now focused on collaborating with experimental colleagues for testing their theory in experiments. The team has planned to use four instead of three electrons in these experiments, which could be implemented by the research partners in Princeton. The Konstanz-based physicists are tasked to offer the theoretical basis, the collaboration partners in the U.S are tasked to perform the experimental part. The research was published in the journal Physical Review Letters on October 25, 2018.

 



Anagha Kulkarni
Anagha Kulkarni,

Anagha Kulkarni
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