Probing untouchable environment as a resource for quantum computing

Abstract

When manipulating a quantum system $S$, its surrounding system, or \textit{environment}, $E$ induces unwanted effects. It is mainly due to its vastness and the lack of knowledge about the Hamiltonian $H_{SE}$ that governs the dynamics inside $E$ and the interaction with $S$. The detail of $H_{SE}$ 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.

21 pages in total

References in corpus (8)

• Experimental Quantum State Tomography of Optical Fields and Ultrafast Statistical Sampling
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Cited by in corpus (3)

• Variational Quantum Algorithm for Estimating the Quantum Fisher Information
• Quantifying precision loss in local quantum thermometry via diagonal discord
• Algebra and Hilbert space structures induced by quantum probes