Relativistic treatment needed for atom coherence in quantum computing

Jen-Tsung Hsiang of National Taiwan University of Science and Technology and Bei-Lok Hu of the University of Maryland have demonstrated that standard calculations used in quantum computing may be flawed, even when atoms move at relatively slow speeds. Their work investigates how motion affects the quantum coherence of an atom’s internal degrees of freedom, revealing significant discrepancies in non-relativistic treatments. The researchers recommend a fully relativistic calculation based on covariance principles as the proper procedure, and a much safer one in terms of accuracy, for modeling atomic dynamics. This approach is essential for designing accurate quantum information processing schemes where maintaining atomic coherence is critical. Current models often fail to account for this effect, misrepresenting the true behavior of quantum decoherence and potentially impacting the design of quantum information processing schemes. The research highlights that the perceived thermal environment shifts for an atom in motion, a phenomenon that…