QuEST and High Performance Simulation of Quantum Computers

We introduce QuEST, the Quantum Exact Simulation Toolkit, and compare it to ProjectQ, qHipster and a recent distributed implementation of Quantum++. QuEST is the first open source, OpenMP and MPI hybridised, GPU accelerated simulator of universal quantum circuits. Embodied as a C library, it is designed so that a user's code can be deployed seamlessly to any platform from a laptop to a supercomputer. QuEST is capable of simulating generic quantum circuits of general single-qubit gates and multi-qubit controlled gates, on pure and mixed states, represented as state-vectors and density matrices, and under the presence of decoherence. Using the ARCUS Phase-B and ARCHER supercomputers, we benchmark QuEST's simulation of random circuits of up to 38 qubits, distributed over up to 2048 compute nodes, each with up to 24 cores. We directly compare QuEST's performance to ProjectQ's on single machines, and discuss the differences in distribution strategies of QuEST, qHipster and Quantum++. QuEST shows excellent scaling, both strong and weak, on multicore and distributed architectures.Comment: 8 pages, 8 figures; fixed typos; updated QuEST URL and fixed typo in Fig. 4 caption where ProjectQ and QuEST were swapped in speedup subplot explanation; added explanation of simulation algorithm, updated bibliography; stressed technical novelty of QuEST; mentioned new density matrix suppor

UC Berkeley's Cory Hall: Evaluation of Challenges and Potential Applications of Building-to-Grid Implementation

From September 2009 through June 2010, a team of researchers developed, installed, and tested instrumentation on the energy flows in Cory Hall on the UC Berkeley campus to create a Building-to-Grid testbed. The UC Berkeley team was headed by Professor David Culler, and assisted by members from EnerNex, Lawrence Berkeley National Laboratory, California State University Sacramento, and the California Institute for Energy & Environment. While the Berkeley team mapped the load tree of the building, EnerNex researched types of meters, submeters, monitors, and sensors to be used (Task 1). Next the UC Berkeley team analyzed building needs and designed the network of metering components and data storage/visualization software (Task 2). After meeting with vendors in January, the UCB team procured and installed the components starting in late March (Task 3). Next, the UCB team tested and demonstrated the system (Task 4). Meanwhile, the CSUS team documented the methodology and steps necessary to implement a testbed (Task 5) and Harold Galicer developed a roadmap for the CSUS Smart Grid Center with results from the testbed (Task 5a) and evaluated the Cory Hall implementation process (Task 5b). The CSUS team also worked with local utilities to develop an approach to the energy information communication link between buildings and the utility (Task 6). The UC Berkeley team then prepared a roadmap to outline necessary technology development for Building-to-Grid, and presented the results of the project in early July (Task 7). Finally, CIEE evaluated the implementation, noting challenges and potential applications of Building-to-Grid (Task 8). These deliverables are available at the i4Energy site: http://i4energy.org/

Energy Information Systems: From the Basement to the Boardroom

A significant buildings energy reduction opportunity exists in the office sector, given that this market segment typically is an early adopter of new technology. There is a rising trend towards smart and connected offices through the internet of things (IoT) that provides new opportunities for operational efficiency and environmental sustainability practices. Leading commercial real estate companies have begun to shift from individual building automation systems (BAS) to partially integrated and automated systems such as energy information systems (EIS). In both the United States and India, organizations are seeking operational excellence, enhanced tenant relationships, and topline growth. Hence it is imperative to engage the executives with decision-making power, by tapping into their interest in sustainability, corporate social responsibility, and innovation. This expansion of interest can enable data-driven decisions, strong energy investments, and deeper energy benefits, and would drive innovation in this field. However, none of this would be possible without robust, consistent building energy information to provide visibility across all the levels of decision making, i.e. from the basement where the facilities staff take operational action to the boardroom where the executives make investment decisions. Price, security, and ease of use remain barriers to the adoption and pervasive use of promising EIS technologies in commercial office buildings. We believe that these barriers can be addressed through the development of ready, simplified, consistent, commercially available, low-cost EIS-in-a-box packages, that have a pre-defined set of hardware components and software features and functionality that are pertinent to a particular building sector. These simplified, sector-specific EIS packages can help to obviate the need for customization, and enhance ease of use, thereby enabling scale-up, in order to facilitate building energy savings. The EIS-in-a-box are adaptable in both U.S. and Indian office buildings, and potentially beyond these two countries

SUSTAINABILITY PRACTICES IN FACILITY MANAGEMENT

Facilities management (FM) has witnessed a pragmatic growth and its importance has increased parallel to the expansion of the construction sector. Meanwhile, the concept of sustainability is being established and is considered an essential topic nowadays. Sustainability standards and accreditations are adapted now to design and erect buildings; however, this will not ensure building efficiency during the building’s life cycle. Integration between facility management and sustainability practices should take place in order to raise a building’s performance and achieve energy conservation throughout the building’s operation. Although much research has been conducted in sustainability, very little researches have investigated the topic of sustainability in facility management. The rational of this study is to get a more thorough understanding of facility management practices and sustainability strategies adopted by different FM departments in Qatar. This research could be considered as the basis for FM research because no such previous research is available for Qatar. Moreover, this study aims to investigate and analyze energy consumption, FM practices, and users’ satisfaction through several case studies in FM educational campuses in Qatar. The first objective of this study is to conduct a comprehensive review of existing FM sustainability plans, strategies and practices on various educational campuses in Qatar by numerous cascading levels of stakeholders; starting from FM managers, engineers, technicians and finishing with users. The second objective is to investigate the knowledge of FM teams regarding sustainability concerns and practices. The third objective is to analyze energy consumption data for different buildings across multiple campuses in Qatar and benchmark them with ones abroad to evaluate energy performance for Qatari campuses. The last objective is to propose sustainable practices that could be implemented to reduce energy consumption during building operation. The methodology that is adapted to collect data for this study consists of qualitative and quantitative methods. The interviews represent the qualitative methods and the survey- questionnaire represents the quantitative method. Moreover the energy consumption data analysis is classified under the quantitative part. The energy consumption was collected for different ten buildings as case studies inside Qatar educational campuses and was analyzed to benchmark them with other broad campuses. Moreover the electricity consumption was benchmarked with Energy star standards for educational campuses in order to give a full image about electricity consumption pattern. Interviews were conducted with 20 participants and 105 participants had filled the survey – questionnaire. The results that were concluded from the interviews and surveys were convergent showing that FM teams lack sustainability training. Sustainability practices are not well understood and implemented by FM departments except planned preventive maintenance that is implemented with a high consideration in campuses and it supports energy conservation. Users’ satisfaction regarding services was good, but was not adequate regarding indoor air temperatures as a lot of users are feeling cold and uncomfortable. An energy consumption analysis was done too and it revealed a continuous increase in energy consumption as the number of occupants is increasing and this is pointing out the need to consider sustainability practices. The main results showed that although the EUI value for the case studies is meeting the energy star standards for most of the buildings, compared to broad campuses Qatar campuses are consuming much more electricity so the results of EUI is not accurately representing energy performance. This was more apparent since benchmarking of buildings abroad was studied in terms of consumption per occupant. To get more accurate results on energy performance patterns, the consumption per occupant was calculated for all of the studied buildings and benchmarked with campus buildings in other countries. The results showed that the consumption per occupant in Qatar is 1.5-2 times more than broad campuses. The results of the study found that energy consumption for classroom buildings and office buildings is the same, although building types and functions are different. The type of HVAC system is highly effecting energy consumption , it was found that HVAC with DX system is consuming 4-5 more times that the district cooling system which needs to be taken into consideration in future projects and studies could be conducted to investigate the feasibility of changing the current DX in to other energy saving systems

Energy challenges for ICT

The energy consumption from the expanding use of information and communications technology (ICT) is unsustainable with present drivers, and it will impact heavily on the future climate change. However, ICT devices have the potential to contribute signi - cantly to the reduction of CO2 emission and enhance resource e ciency in other sectors, e.g., transportation (through intelligent transportation and advanced driver assistance systems and self-driving vehicles), heating (through smart building control), and manu- facturing (through digital automation based on smart autonomous sensors). To address the energy sustainability of ICT and capture the full potential of ICT in resource e - ciency, a multidisciplinary ICT-energy community needs to be brought together cover- ing devices, microarchitectures, ultra large-scale integration (ULSI), high-performance computing (HPC), energy harvesting, energy storage, system design, embedded sys- tems, e cient electronics, static analysis, and computation. In this chapter, we introduce challenges and opportunities in this emerging eld and a common framework to strive towards energy-sustainable ICT

Models for Quality Improvement in CAHs: The Role of State Flex Programs (Briefing Paper #25)

A central goal of the Flex Program, as defined in the original and reauthorizing legislation, is to help Critical Access Hospitals (CAHs) develop and sustain effective quality improvement (QI) programs. This study examined the range of multi-CAH QI and performance measurement reporting initiatives supported by the Flex Program in nine states, assessed the role of State Flex Programs in developing and supporting these initiatives, and explored their impact on the QI programs of CAHs. Key Findings: State Flex Program funding was frequently the primary, if not sole, source of funding to support these efforts. Collaboration and shared learning are common Flex Program strategies underlying state QI initiatives. Quality measurement and reporting is a challenge due to a lack of agreement on common measures across state QI and benchmarking systems and a common belief that Hospital Compare measures are not “rurally relevant” (i.e., specific to the needs of CAHs). Administrative, clinical, and board leadership and buy-in were consistently identified as crucial to the success and sustainability of CAH-level QI initiatives. States reported that the scope of their QI has to be scaled to the available resources and capacity of CAHs to avoid QI fatigue among CAH staff. There is limited hard evidence on the impact of the QI initiatives adopted by State Flex Programs; much of the “evidence” supporting these initiatives is anecdotal or based on postconference or webinar evaluations

Dependability investigation of wireless short range embedded systems: hardware platform oriented approach

A new direction in short-range wireless applications has appeared in the form of high-speed data communication devices for distances of hundreds meters. Behind these embedded applications, a complex heterogeneous architecture is built. Moreover, these short range communications are introduced into critical applications, where the dependability/reliability is mandatory. Thus, dependability concerns around reliability evaluation become a major challenge in these systems, and pose several questions to answer. Obviously, in such systems, the attribute reliability has to be investigated for various components and at different abstraction levels. In this paper, we discuss the investigation of dependability in wireless short range systems. We present a hardware platform for wireless system dependability analysis as an alternative for the time consuming simulation techniques. The platform is built using several instances of one of the commercial FPGA platforms available on the market place. We describe the different steps of building the wireless hardware platform for short range systems dependability analysis. Then, we show how this HW platform based dependability investigation framework can be a very interactive approach. Based on this platform we introduce a new methodology and a flow to investigate the different parts of system dependability at different abstraction levels. The benefits to use the proposed framework are three fold: first, it takes care of the whole system (HW/SW -digital part, mixed RF part, and wireless part); Second, the hardware platform enables to explore the application’s reliability under real environmental conditions taking into account the effect of the environment threats on the system; And last, the wireless platform built for dependability investigation present a fast investigation approach in comparison with the time consuming co-simulation technique

Implementing and characterizing precise multi-qubit measurements

There are two general requirements to harness the computational power of quantum mechanics: the ability to manipulate the evolution of an isolated system and the ability to faithfully extract information from it. Quantum error correction and simulation often make a more exacting demand: the ability to perform non-destructive measurements of specific correlations within that system. We realize such measurements by employing a protocol adapted from [S. Nigg and S. M. Girvin, Phys. Rev. Lett. 110, 243604 (2013)], enabling real-time selection of arbitrary register-wide Pauli operators. Our implementation consists of a simple circuit quantum electrodynamics (cQED) module of four highly-coherent 3D transmon qubits, collectively coupled to a high-Q superconducting microwave cavity. As a demonstration, we enact all seven nontrivial subset-parity measurements on our three-qubit register. For each we fully characterize the realized measurement by analyzing the detector (observable operators) via quantum detector tomography and by analyzing the quantum back-action via conditioned process tomography. No single quantity completely encapsulates the performance of a measurement, and standard figures of merit have not yet emerged. Accordingly, we consider several new fidelity measures for both the detector and the complete measurement process. We measure all of these quantities and report high fidelities, indicating that we are measuring the desired quantities precisely and that the measurements are highly non-demolition. We further show that both results are improved significantly by an additional error-heralding measurement. The analyses presented here form a useful basis for the future characterization and validation of quantum measurements, anticipating the demands of emerging quantum technologies.Comment: 10 pages, 5 figures, plus supplemen