Exploiting Non-Markovianity of the Environment for Quantum Control

When the environment of an open quantum system is non-Markovian, amplitude and phase flow not only from the system into the environment but also back. Here we show that this feature can be exploited to carry out quantum control tasks that could not be realized if the system was isolated. Inspired by recent experiments on superconducting phase circuits, we consider an anharmonic ladder with resonant amplitude control only. This restricts realizable operations to SO(N). The ladder is immersed in an environment of two-level systems. Strongly coupled two-level systems lead to non-Markovian effects, whereas the weakly coupled ones result in single-exponential decay. Presence of the environment allows for implementing diagonal unitaries that, together with SO(N), yield the full group SU(N). Using optimal control theory, we obtain errors that are solely $T_1$-limited

Navy Expeditionary Readiness Cost Modeling

NPS NRP Project PosterOPNAV N834 (Expeditionary Readiness) presently uses an N81 accredited Capability Costing Model (CCM) to inform the annual sustainment requirements for the Navy Expeditionary Combat Enterprise (NECE). The CCM is dated, limited in capability, and lacks adaptability for incorporating measures such as readiness. The lack of a readiness cost model limits proper programmatic assessments on force readiness issues, including costs of readiness achieved and impacts to readiness based on "what-if" drills. The objective of this research is to analyze execution data, phases of Optimized Fleet Response Plan (OFRP), readiness, and other relevant unit and OFRP phase data to identify the cost drivers of the annual sustainment requirements of NECE. We will dissect the existing CCM, assess the importance of factors in accurately predicting sustainment spending, and explore avenues for model enhancement.N8 - Integration of Capabilities & ResourcesThis research is supported by funding from the Naval Postgraduate School, Naval Research Program (PE 0605853N/2098). https://nps.edu/nrpChief of Naval Operations (CNO)Approved for public release. Distribution is unlimited.