11 research outputs found
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Uniting Commedia Dell’arte Traditions with the Spieltenor Repertoire
Sixteenth century commedia dell’arte actors relied on gaudy costumes, physical humor and improvisation to entertain audiences. the Spieltenor in the modern operatic repertoire has a similar comedic role. Would today’s Spieltenor benefit from consulting the commedia dell’arte’s traditions? to answer this question, I examine the commedia dell’arte’s history, stock characters and performance traditions of early troupes. the Spieltenor is discussed in terms of vocal pedagogy and the fach system. I reference critical studies of the commedia dell’arte, sources on improvisatory acting, articles on theatrical masks and costuming, the commedia dell’arte as depicted by visual artists, commedia dell’arte techniques of movement, stances and postures. in addition, I cite vocal pedagogy articles, operatic repertoire and sources on the fach system. My findings suggest that a valid relationship exists between the commedia dell’arte stock characters and the Spieltenor roles in the operatic repertoire. I present five case studies, pairing five stock characters with five Spieltenor roles. Suggestions are provided to enhance the visual, physical and dramatic elements of each role’s performance. I conclude that linking a commedia dell’arte stock character to any Spieltenor role on the basis of shared traits offers an untapped resource to create distinctive characterizations based on theatrical traditions
Reconciling Semiclassical and Bohmian Mechanics: II. Scattering states for discontinuous potentials
In a previous paper [J. Chem. Phys. 121 4501 (2004)] a unique bipolar
decomposition, Psi = Psi1 + Psi2 was presented for stationary bound states Psi
of the one-dimensional Schroedinger equation, such that the components Psi1 and
Psi2 approach their semiclassical WKB analogs in the large action limit.
Moreover, by applying the Madelung-Bohm ansatz to the components rather than to
Psi itself, the resultant bipolar Bohmian mechanical formulation satisfies the
correspondence principle. As a result, the bipolar quantum trajectories are
classical-like and well-behaved, even when Psi has many nodes, or is wildly
oscillatory. In this paper, the previous decomposition scheme is modified in
order to achieve the same desirable properties for stationary scattering
states. Discontinuous potential systems are considered (hard wall, step, square
barrier/well), for which the bipolar quantum potential is found to be zero
everywhere, except at the discontinuities. This approach leads to an exact
numerical method for computing stationary scattering states of any desired
boundary conditions, and reflection and transmission probabilities. The
continuous potential case will be considered in a future publication.Comment: 18 pages, 8 figure
Reconciling Semiclassical and Bohmian Mechanics: III. Scattering states for continuous potentials
In a previous paper [J. Chem. Phys. 121 4501 (2004)] a unique bipolar
decomposition, Psi = Psi1 + Psi2 was presented for stationary bound states Psi
of the one-dimensional Schroedinger equation, such that the components Psi1 and
Psi2 approach their semiclassical WKB analogs in the large action limit. The
corresponding bipolar quantum trajectories, as defined in the usual Bohmian
mechanical formulation, are classical-like and well-behaved, even when Psi has
many nodes, or is wildly oscillatory. A modification for discontinuous
potential stationary stattering states was presented in a second paper [J.
Chem. Phys. 124 034115 (2006)], whose generalization for continuous potentials
is given here. The result is an exact quantum scattering methodology using
classical trajectories. For additional convenience in handling the tunneling
case, a constant velocity trajectory version is also developed.Comment: 16 pages and 14 figure
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Trajectory integration of the quantum hydrodynamic equations of motion
textRecently, in an effort to solve more realistic problems in quantum dynamics,
much attention has been directed into numerically integrating the quantum hydrodynamic
equations of motions (QHEM), as opposed to directly solving the time-dependent
Schrödinger equation (TDSE). Such efforts have been provoked by the many numerical
drawbacks encountered when solving the TDSE on a fixed-grid. In this dissertation, one
trajectory method for integrating the QHEM is reviewed, and two novel trajectories
methods are described. The first of these, the quantum trajectory method (QTM), was
introduced in 1999 and has been used to solve many problems in quantum dynamics
since then. However, severe numerical problems are encountered when this method is
applied to problems that form wave function nodes. To get around this problem, new
methods for numerically integrating the QHEM are needed. In the first novel method
described, the arbitrary Lagrangian-Eulerian (ALE) method, particle trajectories are
governed by a predetermined equation of motion that is user-supplied. The ALE method
remedies inflation and compression problems encountered in the pure Lagrangian QTM. In the second new method discussed, the derivative propagating method (DPM), single
quantum trajectories can be calculated one at a time, as opposed to the ensemble
propagation of the QTM and ALE method. Using these two methods, new solutions to
the QHEM are obtained where the QTM fails. In addition to solving the QHEM, the
DPM is also used to solve the classical Klein-Kramers equation in this dissertation. This
equation governs the Markovian phase space evolution of a system coupled to an
environment such as a heat bath. This marks the first time single trajectories have been
used to solve both the QHEM and the Klein-Kramers equations.Chemistry and BiochemistryChemistr
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The American Songbook: Songs of the American Musical Theatre
Recital presented at the UNT College of Music Voertman Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree
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Lecture Recital: Uniting Commedia Dell'Arte Traditions with the Spieltenor Repertoire
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree
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Doctoral Recitals
Recital presented at the UNT College of Music Voertman Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree
Recommended from our members
Doctoral Recitals
Recital presented at the UNT College of Music Voertman Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree
A Variational Quantum Linear Solver Application to Discrete Finite-Element Methods
Finite-element methods are industry standards for finding numerical solutions to partial differential equations. However, the application scale remains pivotal to the practical use of these methods, even for modern-day supercomputers. Large, multi-scale applications, for example, can be limited by their requirement of prohibitively large linear system solutions. It is therefore worthwhile to investigate whether near-term quantum algorithms have the potential for offering any kind of advantage over classical linear solvers. In this study, we investigate the recently proposed variational quantum linear solver (VQLS) for discrete solutions to partial differential equations. This method was found to scale polylogarithmically with the linear system size, and the method can be implemented using shallow quantum circuits on noisy intermediate-scale quantum (NISQ) computers. Herein, we utilize the hybrid VQLS to solve both the steady Poisson equation and the time-dependent heat and wave equations