447 research outputs found
Estimating the Effects of Integrated Film Production on Box-Office Performance: Do Inhouse Effects Influence Studio Moguls?
Each year well over one billion movie tickets are sold to an audience who knows very little about what they are getting themselves into. Why is it that despite the uncertainty, people return to the theaters to see what Hollywood has in store for them? In efforts to provide answers regarding the driving forces behind Hollywood’s blockbuster hits, this study takes into account the integration levels of the studios. Specifically, does a movie produced in-house at a large studio have a better chance of being a blockbuster hit than one which is outsourced to an independent production company? Further, I discuss the motivation behind the studios’ decision. While considering the embedded integration within the motion picture industry, this study aims to provide insight regarding the extent of internal studio productions and the effects of these films on the box-office
Minimizing gauge-functional for 2-d gravity and string theory
We show the existence of a minimizing procedure for selecting a unique
representative on the orbit of any given Riemann surface that contributes to
the string partition function. As it must, the procedure reduces the string
path integral to a final integration over a particular fundamental domain,
selected by the choice of the minimizing functional. This construction somehow
demystifies the Gribov question
Worldlines as Wilson Lines
Gravitational theories do not admit gauge invariant local operators. We study
the limits under which there exists a quasi-local description for a class of
non-local gravitational observables where a sum over worldlines plays the role
of the Wilson line for gauge theory observables. We study non-local corrections
to the local description and circumstances where these corrections become
large. We find that these operators are quasi-local in flat space and AdS, but
fail to be quasi-local in de Sitter space.Comment: 20 page
Bistable nanoelectromechanical devices
A combined transmission electron microscopy-scanning tunneling microscopy (TEM-STM) technique has been used to investigate the force interactions of silicon and germanium nanowires with gold electrodes. The I(V) data obtained typically show linear behavior between the gold electrode and silicon nanowires at all contact points, whereas the linearity of I(V) curves obtained for germanium nanowires were dependent on the point of contact. Bistable silicon and germanium nanowire-based nanoelectromechanical programmable read-only memory (NEMPROM) devices were demonstrated by TEM-STM. These nonvolatile NEMPROM devices have switching potentials as low as 1 V and are highly stable making them ideal candidates for low-leakage electronic devices. (C) 2004 American Institute of Physics. (DOI:10.1063/1.1751622
On the charge density and asymptotic tail of a monopole
We propose a new definition for the abelian magnetic charge density of a nonabelian monopole, based on zero-modes of an associated Dirac operator. Unlike the standard definition of the charge density, this density is smooth in the core of the monopole. We show that this charge density induces a magnetic field whose expansion in powers of 1=r agrees with that of the conventional asymptotic magnetic field to all orders. We also show that the asymptotic field can be easily calculated from the spectral curve. Explicit examples are given for known monopole solutions
Analysis of Observables in Chern-Simons Perturbation Theory
Chern-Simons Theory with gauge group is analyzed from a perturbation
theory point of view. The vacuum expectation value of the unknot is computed up
to order and it is shown that agreement with the exact result by Witten
implies no quantum correction at two loops for the two-point function. In
addition, it is shown from a perturbation theory point of view that the framing
dependence of the vacuum expectation value of an arbitrary knot factorizes in
the form predicted by Witten.Comment: 42page
Recent Developments in Lattice QCD
I review the current status of lattice QCD results. I concentrate on new
analytical developments and on numerical results relevant to phenomenology.Comment: 35 pages, 4 figures (Figures are excerpted from others' work and are
not included) Uses harvmac.te
Gribov Problem for Gauge Theories: a Pedagogical Introduction
The functional-integral quantization of non-Abelian gauge theories is
affected by the Gribov problem at non-perturbative level: the requirement of
preserving the supplementary conditions under gauge transformations leads to a
non-linear differential equation, and the various solutions of such a
non-linear equation represent different gauge configurations known as Gribov
copies. Their occurrence (lack of global cross-sections from the point of view
of differential geometry) is called Gribov ambiguity, and is here presented
within the framework of a global approach to quantum field theory. We first
give a simple (standard) example for the SU(2) group and spherically symmetric
potentials, then we discuss this phenomenon in general relativity, and recent
developments, including lattice calculations.Comment: 24 pages, Revtex 4. In the revised version, a statement has been
amended on page 11, and References 14, 16 and 27 have been improve
Analytic Continuation of Liouville Theory
Correlation functions in Liouville theory are meromorphic functions of the
Liouville momenta, as is shown explicitly by the DOZZ formula for the
three-point function on the sphere. In a certain physical region, where a real
classical solution exists, the semiclassical limit of the DOZZ formula is known
to agree with what one would expect from the action of the classical solution.
In this paper, we ask what happens outside of this physical region. Perhaps
surprisingly we find that, while in some range of the Liouville momenta the
semiclassical limit is associated to complex saddle points, in general
Liouville's equations do not have enough complex-valued solutions to account
for the semiclassical behavior. For a full picture, we either must include
"solutions" of Liouville's equations in which the Liouville field is
multivalued (as well as being complex-valued), or else we can reformulate
Liouville theory as a Chern-Simons theory in three dimensions, in which the
requisite solutions exist in a more conventional sense. We also study the case
of "timelike" Liouville theory, where we show that a proposal of Al. B.
Zamolodchikov for the exact three-point function on the sphere can be computed
by the original Liouville path integral evaluated on a new integration cycle.Comment: 86 pages plus appendices, 9 figures, minor typos fixed, references
added, more discussion of the literature adde
Positive specific heat of the quantum corrected dilaton black hole
Path integral quantization of dilaton gravity in two dimensions is applied to
the CGHS model to the first nontrivial order in matter loops. Our approach is
background independent as geometry is integrated out exactly. The result is an
effective shift of the Killing norm: the apparent horizon becomes smaller. The
Hawking temperature which is constant to leading order receives a quantum
correction. As a consequence, the specific heat becomes positive and
proportional to the square of the black hole mass.Comment: 18 pages, JHEP style, 1 eps figure, v2: extended the discussion,
added new formulas for mass change, added three new references (in particular
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