Long-lived ytterbium states could sharpen quantum computing and atomic clocks

Long-lived ytterbium states could sharpen quantum computing and atomic clocks

Researchers from the University of Amsterdam and the University of New South Wales have answered a question that has been around for decades: whether ions of the metal ytterbium can enter certain long-lived, nearly stable states and, if so, for how long. The measured long-lived states may find applications in quantum computers and atomic clocks.

Southern University Of Science And Technology: Researchers Model Quantum Control Using Sp(2N,R) Interferometry

Can phase estimation in multi-mode bosonic interferometers truly reach the ultimate quantum limit defined by the quantum Fisher information. Establishing a general theory founded on Sp(2N, R) symmetry, this work demonstrates it is possible with a novel Sp(2N, R) echo, extending established SU(1,1) interferometry to multiple modes. This provides a framework for both enhanced quantum metrology and advanced bosonic quantum computing.