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(Phys.org) -- At the heart of quantum mechanics lies the wave function, a probability function used by physicists to understand the nanoscale world. Using the wave function, physicists can calculate a system's future behavior, but only with a certain probability. This inherently probabilistic nature of quantum theory differs from the certainty with which scientists can describe the classical world, leading to a nearly century-long debate on how to interpret the wave function: does it representative objective reality or merely the subjective knowledge of an observer?

Quantum memory is one of the basic building blocks needed for realizing a quantum computer one day. Atac Imamoglu, a professor of quantum electronics, and Renato Renner, a professor of theoretical physics, examined the issue of whether there can be long-term memory for quantum information at all using numerical models and theoretical analyses