What is it about?
Proper actions that include measurement performed on a quantum system can help in avoiding the detrimental consequences of quantum decoherence on quantum information hardware.
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Why is it important?
Quantum decoherence often destroys quantum entanglement as a quantum information resource. However, operating on an alternative structure (decomposition into subsystems, including the 'virtual' subsystems) can help: tensor product states for one structure bear entanglement for virtually every other structure of the composite system.
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This page is a summary of: Multiple System-Decomposition Method for Avoiding Quantum Decoherence, Chinese Physics Letters, February 2008, Institute of Physics Publishing,
DOI: 10.1088/0256-307x/25/2/006.
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