Probing untouchable environment as a resource for quantum computing
Abstract
When manipulating a quantum system S, its surrounding system, or environment, E induces unwanted effects. It is mainly due to its vastness and the lack of knowledge about the Hamiltonian HSE that governs the dynamics inside E and the interaction with S. The detail of HSE is usually extremely hard to identify, since E can hardly be measured or controlled directly. Nevertheless, here we show that it is possible to probe and control a part of, if not all, the dynamics involving E, within the timescale in which its effective dimension can be seen finite. That is, we may be able to let a noisy environment work in our favor as a part of quantum computer.
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