What is our value and who values us?

Citation: Goetsch, Lori A. “What is our value and who values us?: The 2009–10 ACRL President’s focus,” College and Research Libraries News October 2009 70:502-503.As an academic librarian for nearly 30 years, I have experienced many of the challenges that we face at our home institutions. Today, the current economic climate has created a particularly daunting challenge and a sense of vulnerability. Staff are furloughed, service hours are cut, positions go unfilled, and the acquisition of materials cannot keep up with user needs

Creating a Culture of Security in the University of Maryland Libraries

Citation: Lowry, Charles B. and Lori A. Goetsch, “Creating a Culture of Security in the University of Maryland Libraries,” portal: Libraries and the Academy, 1(4):455-464, October 2001.A critical part of building a shared culture of mutual responsibility for security and safety is a thorough understanding of all the elements of a library’s security environment. To address the need for a more coherent approach to library safety and security that reinforces a philosophy of shared responsibility among all staff, the University of Maryland Libraries embarked upon an assessment of policies, procedures, and facilities in partnership with the Association of Research Libraries. Begun in the fall of 1997, the security study and subsequent development of practice and policy were implemented over a two-year period and serve as a model comprehensive approach for a large academic library system

Cat States and Single Runs for the Damped Harmonic Oscillator

We discuss the fate of initial states of the cat type for the damped harmonic oscillator, mostly employing a linear version of the stochastic Schr\"odinger equation. We also comment on how such cat states might be prepared and on the relation of single realizations of the noise to single runs of experiments.Comment: 18, Revte

The Evolving Research Library: Responsive Organizational Change

Citation: Goetsch, L., Haddock, M., & Stockham, M. (2017). The Evolving Research Library: Responsive Organizational Change. Library Leadership & Management, 31(2).Because of the pace of change in library environments, the organization is continuously evolving and the days of having a structure etched in stone are gone. Kansas State University Libraries engaged in a major organizational restructuring in 2009-2010 and, based on studies and assessments, two smaller but significant changes again in 2015. To assess and redesign the organization, analysis of new and emerging work, staff resources, budget, and space were critical, but the important constant was library users and meeting their needs. This article outlines development of the structural reorganizations, issues encountered during the changes, examples of task force work, lessons learned about process and outcomes, and resulting changes that were made

Predictability sieve, pointer states, and the classicality of quantum trajectories

We study various measures of classicality of the states of open quantum systems subject to decoherence. Classical states are expected to be stable in spite of decoherence, and are thought to leave conspicuous imprints on the environment. Here these expected features of environment-induced superselection (einselection) are quantified using four different criteria: predictability sieve (which selects states that produce least entropy), purification time (which looks for states that are the easiest to find out from the imprint they leave on the environment), efficiency threshold (which finds states that can be deduced from measurements on a smallest fraction of the environment), and purity loss time (that looks for states for which it takes the longest to lose a set fraction of their initial purity). We show that when pointer states -- the most predictable states of an open quantum system selected by the predictability sieve -- are well defined, all four criteria agree that they are indeed the most classical states. We illustrate this with two examples: an underdamped harmonic oscillator, for which coherent states are unanimously chosen by all criteria, and a free particle undergoing quantum Brownian motion, for which most criteria select almost identical Gaussian states (although, in this case, predictability sieve does not select well defined pointer states.)Comment: 10 pages, 13 figure

Conditional quantum dynamics with several observers

We consider several observers who monitor different parts of the environment of a single quantum system and use their data to deduce its state. We derive a set of conditional stochastic master equations that describe the evolution of the density matrices each observer ascribes to the system under the Markov approximation, and show that this problem can be reduced to the case of a single "super-observer", who has access to all the acquired data. The key problem - consistency of the sets of data acquired by different observers - is then reduced to the probability that a given combination of data sets will be ever detected by the "super-observer". The resulting conditional master equations are applied to several physical examples: homodyne detection of phonons in quantum Brownian motion, photo-detection and homodyne detection of resonance fluorescence from a two-level atom. We introduce {\it relative purity} to quantify the correlations between the information about the system gathered by different observers from their measurements of the environment. We find that observers gain the most information about the state of the system and they agree the most about it when they measure the environment observables with eigenstates most closely correlated with the optimally predictable {\it pointer basis} of the system.Comment: Updated version: new title and contents. 22 pages, 8 figure

Lifetime Studies at Metrology Light Source and ANKA

The Metrology Light Source MLS , situated in Berlin Germany is an electron storage ring operating from 105 MeV to 630 MeV and is serving as the national primary radiation source standard from the near infrared to the extrem ultraviolet spectral region [1]. In its standard user mode, the lifetime is dominated by the Touschek effect. Measurements and analysis of the Touschek lifetime as a function of beam current and RF Voltage will be presented and compared to measurements done at the A amp; 730; ngstro mquelle Karlsruhe ANKA electron storage ring Karlsruhe, Germany which operates at 0.5 to 2.5 GeV [2

Optimal control of entanglement via quantum feedback

It has recently been shown that finding the optimal measurement on the environment for stationary Linear Quadratic Gaussian control problems is a semi-definite program. We apply this technique to the control of the EPR-correlations between two bosonic modes interacting via a parametric Hamiltonian at steady state. The optimal measurement turns out to be nonlocal homodyne measurement -- the outputs of the two modes must be combined before measurement. We also find the optimal local measurement and control technique. This gives the same degree of entanglement but a higher degree of purity than the local technique previously considered [S. Mancini, Phys. Rev. A {\bf 73}, 010304(R) (2006)].Comment: 10 pages, 5 figure