Browsing by Subject "quantum physics"
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Item A Method of Finding a Lower Energy Solution to a QUBO/Ising Objective Function(2018) Dorband, John E.A new method to find a lower energy solution to a QUBO/Ising objective function will be presented in this paper. It is applied to samples returned from the D-Wave for various example cases. This method, multi-qubit correction (MQC), creates a sample with an equal-to or less-than energy than any of the D-wave samples used to create it. The method will be detailed and the results of 3 uses cases will be given to demonstrate its merit.Item Quantum fluctuation theorem to benchmark quantum annealers(2018) Gardas, Bartlomiej; Deffner, SebstianNear term quantum hardware promises unprecedented computational advantage. Crucial in its development is the characterization and minimization of computational errors. We propose the use of the quantum fluctuation theorem to benchmark the performance of quantum annealers. This versatile tool provides simple means to determine whether the quantum dynamics are unital, unitary, and adiabatic, or whether the system is prone to thermal noise. Our proposal is experimentally tested on two generations of the D-Wave machine, which illustrates the sensitivity of the fluctuation theorem to the smallest aberrations from ideal annealing.Item Quantum Readiness in Healthcare and Public Health: Building a Quantum Literate Workforce(2024-02-29) VanGeest, Johnathan B; Fogarty, Kieran J; Hervey, William G; Hanson, Robert A; Nair, Suresh; Akers, Timothy AQuantum technologies, including quantum computing, cryptography, and sensing, among others, are set to revolutionize sectors ranging from materials science to drug discovery. Despite their significant potential, the implications for public health have been largely overlooked, highlighting a critical gap in recognition and preparation. This oversight necessitates immediate action, as public health remains largely unaware of quantum technologies as a tool for advancement. The application of quantum principles to epidemiology and health informatics, termed quantum health epidemiology and quantum health informatics, has the potential to radically transform disease surveillance, prediction, modeling, and analysis of health data. However, there is a notable lack of quantum expertise within the public health workforce and educational pipelines. This gap underscores the urgent need for the development of quantum literacy among public health practitioners, leaders, and students to leverage emerging opportunities while addressing risks and ethical considerations. Innovative teaching methods, such as interactive simulations, games, visual models, and other tailored platforms, offer viable solutions for bridging knowledge gaps without the need for advanced physics or mathematics. However, the opportunity to adapt is fleeting as the quantum era in healthcare looms near. It is imperative that public health urgently focuses on updating its educational approaches, workforce strategies, data governance, and organizational culture to proactively meet the challenges of quantum disruption thereby becoming quantum ready.Item Sebastian Deffner: Nonlinear speed-ups in ultracold quantum gases(PCS Institute for Basic Science, 2021-12-01) Deffner, SebastianEstimating the maximal rate with which quantum states can change is of fundamental importance in virtually all areas of quantum physics. Upper bounds on this rate have become known as Quantum Speed Limits, which can be understood as rigorous generalizations of Heisenberg’s uncertainty relation for energy and time. In this talk, I will be analyzing Quantum Speed Limits for ultracold Bosonic gases that are well-described by the Gross-Pitaevskii equation. I will demonstrate that the nonlinear term permits quantum states to evolve faster than in linear media. From a practical point of view, this observation may be exploited for accelerated quantum communication in nonlinear optical fibers.