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1.
Fraydoun Rezakhanlou 《Communications in Mathematical Physics》2003,232(2):327-375
We examine a system of particles in which the particles travel deterministically in between stochastic collisions. The collisions
are elastic and occur with probability ɛ
d
when two particles are at a distance σ. When the number of particles N goes to infinity and Nɛ
d
goes to a nonzero constant, we show that the particle density converges to a solution of the Enskog Equation.
Received: 29 January 2002 / Accepted: 30 July 2002 Published online: 14 November 2002
RID="*"
ID="*" Research supported in part by NSF Grant DMS-0072666 相似文献
2.
We obtain explicit expressions for all genus one chiral n-point functions for free bosonic and lattice vertex operator algebras. We also consider the elliptic properties of these
functions.
Received: 6 May 2002 / Accepted: 4 October 2002 Published online: 24 January 2003
RID="*"
ID="*" Partial support provided by NSF DMS-9709820 and the Committee on Research, University of California, Santa Cruz
RID="⋆⋆"
ID="⋆⋆" Supported by an Enterprise Ireland Basic Research Grant and the Millenium Fund, National University of Ireland, Galway
Communicated by L. Takhtajan 相似文献
3.
We present an experimental study of non-linear selective reflection (SR) at a quartz–Cs-vapor interface in a V-type three-level
scheme. The non-linear selective reflection at the Cs D2 resonance line (6
S
1/2F=4→6
P
3/2) is monitored with and without pumping. The sub-Doppler reflection spectrum is observed and the effect of pumping on the
signal of the selective reflection is investigated. The experimental result is in agreement with the theoretical calculation.
Received: 16 April 2002 / Revised version: 12 June 2002 / Published online: 25 September 2002
RID="*"
ID="*"Corresponding author. Fax: +86-351/701-1500, E-mail: zhaojm@sxu.edu.cn 相似文献
4.
S.A. Nepijko M. Klais G. Schönhense N. Cramer Z. Celinski C.M. Schneider S. Zennaro N. Zema N.N. Sedov 《Applied Physics A: Materials Science & Processing》2003,76(5):809-815
Micromagnetic properties of the Fe19Ni81 (5 nm)/NiO (50 nm)/Fe19Ni81 (30 nm) structured system have been investigated in a photoemission electron microscope in the magnetic X-ray circular dichroism
operating mode. The microstructured Fe19Ni81 (5 nm) film contained two-dimensional islands with the aspect ratio varying from 1:1 to 10:1, and the linear size of their
long axis comprised 24, 12 and 6 μm. It is shown that the magnetic domains have the direction of magnetization preferentially
parallel and antiparallel to the magnetic field direction in which this system was prepared. Their number is determined by
the particles’ sizes, their shape as well as by the direction of the external magnetizing field and can be characterized by
a non-monotonic size dependence. The magnetization of domains with different lateral sizes was found to be 0.4 T with an accuracy
better than 20%.
Received: 29 May 2002 / Accepted: 17 July 2002 / Published online: 22 November 2002
RID="*"
ID="*"Corresponding author. Fax: +49-6131/392-3807, E-mail: nepijko@mail.uni-mainz.de 相似文献
5.
Quantum Spheres and Projective Spaces as Graph Algebras 总被引:5,自引:0,他引:5
The C
*
-algebras of continuous functions on quantum spheres, quantum real projective spaces, and quantum complex projective spaces
are realized as Cuntz-Krieger algebras corresponding to suitable directed graphs. Structural results about these quantum spaces,
especially about their ideals and K-theory, are then derived from the general theory of graph algebras. It is shown that the quantum even and odd dimensional
spheres are produced by repeated application of a quantum double suspension to two points and the circle, respectively.
Received: 31 January 2001 / Accepted: 29 July 2002 Published online: 7 November 2002
RID="*"
ID="*" Supported by grant No. R04–2001–000–00117–0 from the Korea Science & Engineering Foundation.
RID="**"
ID="**" Partially supported by the Research Management Committee of the University of Newcastle. 相似文献
6.
Jingbo Xia 《Communications in Mathematical Physics》2003,232(2):303-317
We give a new proof of the invariance principle for wave operators based on certain well-known properties of Calderón commutators.
This method extends the invariance principle to a larger class of admissible functions. In particular, admissible functions
need not be monotonic on any interval.
Received: 18 March 2002 / Accepted: 5 July 2002 Published online: 22 November 2002
RID="*"
ID="*" This work was supported in part by National Science Foundation grant DMS-0100249 相似文献
7.
F. Finster N. Kamran J. Smoller S.-T. Yau 《Communications in Mathematical Physics》2002,230(2):201-244
The Cauchy problem is considered for the massive Dirac equation in the non-extreme Kerr–Newman geometry, for smooth initial
data with compact support outside the event horizon and bounded angular momentum. We prove that the Dirac wave function decays
in at least at the rate t
−5/6. For generic initial data, this rate of decay is sharp. We derive a formula for the probability p that the Dirac particle escapes to infinity. For various conditions on the initial data, we show that p = 0, 1 or 0 < p < 1. The proofs are based on a refined analysis of the Dirac propagator constructed in [4].
Received: 20 August 2001 / Accepted: 22 January 2002
RID="*"
ID="*"Present address: NWF I – Mathematik, Universit?t Regensburg, 93040 Regensburg, Germany.?E-mail: felix.finster@mathematik.uni-regensburg.de
RID="**"
ID="**"Research supported by NSERC grant # RGPIN 105490-1998.
RID="***"
ID="***"Research supported in part by the NSF, Grant No. DMS-0103998.
RID="****"
ID="****"Research supported in part by the NSF, Grant No. 33-585-7510-2-30. 相似文献
8.
The restricted circular three-body problem is considered for the following parameter values C=3.03, μ=0.0009537 – the values for the Oterma comet in the Sun-Jupiter system. We present a computer assisted proof of an existence of a homo- and heteroclinic cycle between
two Lyapunov orbits and an existence of symbolic dynamics on four symbols built on this cycle.
Received: 15 April 2002 / Accepted: 16 May 2002 Published online: 20 January 2003
RID="*"
ID="*" Research supported in part by Polish KBN grant 2 P03A 011 18, NSF grant DGE-98-04459 and PRODYN.
Communicated by G. Gallavotti 相似文献
9.
James Isenberg Rafe Mazzeo Daniel Pollack 《Communications in Mathematical Physics》2002,231(3):529-568
We establish a general gluing theorem for constant mean curvature solutions of the vacuum Einstein constraint equations.
This allows one to take connected sums of solutions or to glue a handle (wormhole) onto any given solution. Away from this
handle region, the initial data sets we produce can be made as close as desired to the original initial data sets. These constructions
can be made either when the initial manifold is compact or asymptotically Euclidean or asymptotically hyperbolic, with suitable
corresponding conditions on the extrinsic curvature. In the compact setting a mild nondegeneracy condition is required. In
the final section of the paper, we list a number ways this construction may be used to produce new types of vacuum spacetimes.
Received: 4 October 2001 / Accepted: 26 July 2002 Published online: 29 October 2002
RID="*"
ID="*" Supported by the NSF under Grant PHY-0099373
RID="**"
ID="**" Supported by the NSF under Grant DMS-9971975 and at MSRI by NSF grant DMS-9701755
RID="***"
ID="***" Supported by the NSF under Grant DMS-9704515 相似文献
10.
Peter Wittwer 《Communications in Mathematical Physics》2003,234(3):557-565
This paper is a supplementary section to [1]. We show that without any additional hypothesis the main result in [1] (Theorem
1) can be considerably strengthened.
Note. This paper cannot be read independently of [1]. The numbering of equations, theorems and propositions as well as cross-references
used here have to be understood as if this paper were an additional section to [1].
Received: 7 May 2002 / Accepted: 15 October 2002 Published online: 10 February 2003
RID="*"
ID="*" Supported in part by the Fonds National Suisse.
Communicated by A. Kupiainen 相似文献
11.
Aldo Procacci Benedetto Scoppola Victor Gerasimov 《Communications in Mathematical Physics》2003,235(2):215-231
Given an infinite graph 𝔾 quasi-transitive and amenable with maximum degree Δ, we show that reduced ground state degeneracy
per site W
r
(𝔾, q) of the q-state antiferromagnetic Potts model at zero temperature on 𝔾 is analytic in the variable 1/q, whenever |2Δe
3
/q|<1. This result proves, in an even stronger formulation, a conjecture originally sketched in [12] and explicitly formulated
in [16 and 19], based on which a sufficient condition for W
r
(𝔾, q) to be analytic at 1/q=0 is that 𝔾 is a regular lattice.
Received: 16 January 2002 / Accepted: 17 October 2002 Published online: 18 February 2003
RID="*"
ID="*" Partially supported by CNPq (Brazil)
RID="**"
ID="**" Partially supported by CNR, G.N.F.M. (Italy)
Communicated by H. Spohn 相似文献
12.
F. Finkel D. Gómez-Ullate A. González-López M.A. Rodríguez R. Zhdanov 《Communications in Mathematical Physics》2003,233(2):191-209
The B
N
hyperbolic Sutherland spin model is expressed in terms of a suitable set of commuting Dunkl operators. This fact is exploited
to derive a complete family of commuting integrals of motion of the model, thus establishing its integrability. The Dunkl
operators are shown to possess a common flag of invariant finite-dimensional linear spaces of smooth scalar functions. This
implies that the Hamiltonian of the model preserves a corresponding flag of smooth spin functions. The discrete spectrum of
the restriction of the Hamiltonian to this spin flag is explicitly computed by triangularization. The integrability of the
hyperbolic Sutherland spin chain of B
N
type associated with the dynamical model is proved using Polychronakos's ``freezing trick'.
Received: 14 February 2002 / Accepted: 19 June 2002 Published online: 10 December 2002
RID="*"
ID="*" Corresponding author. E-mail: artemio@fis.ucm.es
RID="**"
ID="**" On leave of absence from Institute of Mathematics, 3 Tereschenkivska St., 01601 Kyiv-4 Ukraine
Communicated by L. Takhtajan 相似文献
13.
D. Sarkisyan T. Becker A. Papoyan P. Thoumany H. Walther 《Applied physics. B, Lasers and optics》2003,76(6):625-631
An extremely thin cell (ETC) with the thickness of a Rb atomic vapor layer in the range of 100–300 nm was fabricated. It is
demonstrated that a simple laser-diode technique with a single resonant light beam is sufficient to observe separately all
of the atomic hyperfine transitions of the D
2 line of Rb (780 nm) and also allows us to measure the relative transition probabilities of the hyperfine transitions. The
onset of collisional self-broadening of the hyperfine transitions as the number density of atoms increases was studied. The
detrimental role of the atoms with slow longitudinal velocity in the sub-Doppler response of the Rb ETC is demonstrated by
studies in which the cell is tilted from normal incidence of the laser beam. It is also shown that using an ETC allows us
to resolve in a moderate external magnetic field the Zeeman splitting of the hyperfine transitions of the 87Rb D
1 transition F
g=1F
e=1,2.
Received: 19 February 2003 / Revised version: 4 April 2003 / Published online: 2 June 2003
RID="*"
ID="*"Corresponding author. Fax: +374/32-31172, E-mail: david@ipr.sci.am 相似文献
14.
For aL
∞
(ℝ+)∩L
1
(ℝ+) the truncated Bessel operator B
τ
(a) is the integral operator acting on L
2
[0,τ] with the kernel
where J
ν
stands for the Bessel function with ν>−1. In this paper we determine the asymptotics of the determinant det(I+B
τ
(a)) as τ→∞ for sufficiently smooth functions a for which a(x)≠1 for all x[0,∞). The asymptotic formula is of the form det(I+B
τ
(a))∼G
τ
E with certain constants G and E, and thus similar to the well-known Szeg?-Akhiezer-Kac formula for truncated Wiener-Hopf determinants.
Received: 23 April 2002 / Accepted: 25 September 2002 Published online: 24 January 2003
RID="*"
ID="*" Supported in part by NSF Grant DMS-9970879.
Communicated by J.L. Lebowitz 相似文献
15.
K.H. Heinig T. Müller B. Schmidt M. Strobel W. Möller 《Applied Physics A: Materials Science & Processing》2003,77(1):17-25
We have investigated the synthesis of nanostructures, as well as the control of their size and location by means of ion beams.
The phase separation and interface kinetics under ion irradiation give new possibilities for controlling the growth of nanostructures.
Additionally, the chemical decomposition of the host matrix by collisional mixing can contribute to the self-organization
of nanostructures, especially at interfaces. It is shown how collisional mixing during ion implantation affects nanocrystal
(NC) synthesis and how ion irradiation through NCs modifies their size and size distribution. An analytical expression for
solute concentration around an ion-irradiated NC was found, which may be written like the well-known Gibbs–Thomson relation.
However, parameters have modified meanings, which has a significant impact on the evolution of NC ensembles. “Inverse Ostwald
ripening” of NCs, resulting in an unimodal NC size distribution, is predicted, which has been confirmed experimentally for
Au NCs in SiO2 and by kinetic lattice Monte Carlo simulations. At interfaces, the same ion-irradiation-induced mechanism may result in self-organization
of NCs into a thin δ-layer. Collisional decomposition of SiO2 may enhance the NC δ-layer formation in SiO2 at the Si/SiO2 interface. The distance of the self-organized NC δ-layer from the SiO2/Si interface renders the structure interesting for non-volatile memory applications.
Received: 11 November 2002 / Accepted: 12 November 2002 / Published online: 4 April 2003
RID="*"
ID="*"Corresponding author. Fax: +49-351-260-3285, E-mail: K.-H.Heinig@fz-rossendorf.de 相似文献
16.
By applying the supersymmetric approach we rigorously prove smoothness of the averaged density of states for a three dimensional
random band matrix ensemble, in the limit of infinite volume and fixed band width. We also prove that the resulting expression
for the density of states coincides with the Wigner semicircle with a precision 1/W
2
, for W large but fixed.
Received: 6 February 2002 / Accepted: 17 July 2002 Published online: 7 November 2002
RID="*"
ID="*" Supported by NSF grant DMS 9729992 相似文献
17.
G.F. Cerofolini 《Applied Physics A: Materials Science & Processing》2003,76(1):49-52
The thermodynamic and kinetic stabilities of the Si–H bonds at the Si–SiO2 interface are studied on the basis of high-level quantum-mechanical calculations in the framework of density-functional theory.
In the absence of an applied electric field, the silanic bond is shown to be stable with respect to both hole capture from
the top of the silicon valence band and electron loss to the bottom of the silicon conduction band, but unstable with respect
to hole capture from the top of the SiO2 conduction band. The positively charged hydrogen does not shift spontaneously to protonate a neighbouring siloxanic bridge
unless it contains one adsorbed water molecule at least. The protonated siloxanic site thus formed may restore the original
silanic site (via simultaneous electron capture from the conduction band and hydron shift to silicon) but also evolve spontaneously
to a hydrogen atom via simple electron capture.
Received: 2 November 2001 / Accepted: 6 January 2002 / Published online: 20 March 2002 / Published online: 20 March 2002
RID="*"
ID="*"Also at: STMicroelectronics, 20041 Agrate MI, Italy (E-mail: gianfranco.cerofolini@st.com) 相似文献
18.
Hsungrow Chan Chun-Chieh Fu Chang-Shou Lin 《Communications in Mathematical Physics》2002,231(2):189-221
In this article, we construct self-dual N-vortex solutions with a large magnetic flux Φ of (2+1)-dimensional relativistic Chern-Simons model, provided that the coupling
constant κ is small and the cites of vorticity satisfies
.
Our solutions exhibit the bubbling phenomenon at each p
j
. Near each vortex p
j
, solutions are locally asymptotically symmetric with respect to p
j
, and the curvature F
12 tends to a sum of Dirac measures as κ tends to zero. By a heuristic argument, it is shown that (0.1) is also a necessary
condition for the existence of multi-vortex solutions which has a locally asymptotically symmetric vortex at .
Received: 20 August 2001 / Accepted: 31 December 2001 Published online: 29 October 2002
RID="*"
ID="*" Partially supported by National Center for Theoretical Sciences of NSC, Taiwan. 相似文献
19.
A.V. Karabutov V.D. Frolov E.N. Loubnin A.V. Simakin G.A. Shafeev 《Applied Physics A: Materials Science & Processing》2003,76(3):413-416
Low-threshold field electron emission (FEE) is reported for periodic arrays of micro-tips produced by laser ablation of Si
wafers. The best samples show emission at threshold fields as low as 4–5 V/μm for n-type Si substrates and of 1–2 V/μm for
p-doped Si substrates, as measured with a flat-screen technique. Auger electron spectroscopy and X-ray electron spectroscopy
reveal island-like deviation of the SiO2 stoichiometry on the tip surfaces, with lateral dimensions of less than 100 nm. Microscopic studies using a special field-emission
STM show that the emission originates from well-conducting regions of sub-micron size. The experimental data suggest FEE from
the tip arrays by a geometric field enhancement of both the individual micro-tip and the narrow conducting channels in the
tip body.
Received: 3 May 2002 / Accepted: 1 July 2002 / Published online: 28 October 2002
RID="*"
ID="*"Corresponding author. Fax: +7-095/135-82-34, E-mail: shafeev@kapella.gpi.ru 相似文献
20.
We study the hydrodynamic density fluctuations of an infinite system of interacting particles on ℝ
d
. The particles interact between them through a two body superstable potential, and with a surrounding fluid in equilibrium
through a random viscous force of Ornstein-Uhlenbeck type. The stationary initial distribution is the Gibbs measure associated
with the potential and with a given temperature and fugacity. We prove that the time-dependent density fluctuation field converges
in law, under diffusive scaling of space and time, to the solution of a linear stochastic partial differential equation driven
by white noise.
Received: 10 July 2001 / Accepted: 9 September 2002 Published online: 8 January 2003
RID="*"
ID="*" We thank J. Fritz for fruitful discussions, in particular about the existence of the infinite dynamics. A special thanks
to L. Bertini for help in the proof of the spectral gap estimate (cf. Appendix B).
Communicated by H. Spohn 相似文献