36 Result(s)

Article

Northern European manpower in Otorhinolaryngology-Head and Neck Surgery

A. A. Mäkitie, H. Irjala, S. Steinsvåg… in European Archives of Oto-Rhino-Laryngology (2017)

Article

Prophylaktische oder therapeutische parathyreoidektomie beim primären hyperparathyreoidismus

The only causal treatment of primary hyperparathyroidism (PHPT) is parathyroidectomy. There are indications in the literature that despite operation expectation of life is shortened because of an increased fre...

P. Buchmann, M. Lüscher, F. Largiadèr, W. Weder in Langenbecks Archiv für Chirurgie (1992)

Chapter and Conference Paper

Prophylactic or Therapeutic Parathyroidectomy for Primary Hyperparathyroidism

Primary hyperparathyroidism (PHPT) causes, among other things, peptic ulcer disease and pancreatitis. Parathyroidectomy was performed 82 times in 71 patients. There was no mortality. Paralysis of the recurrent...

P. Buchmann, M. Lüscher, F. Largiadèr… in Die Chirurgie und ihre Spezialgebiete Eine… (1991)

Chapter

Solution of the Lattice ϕ⁴ Theory in 4 Dimensions

Some recent analytical and numerical studies of the one component ϕ⁴ theory on a 4-dimensional hypercubic lattice are reviewed. Taken together, the results obtained provide a complete solution of the model in the...

M. Lüscher in Nonperturbative Quantum Field Theory (1988)

Article

Volume dependence of the energy spectrum in massive quantum field theories

The low-lying energy values associated to energy eigenstates describing two stable particles enclosed in a (space-like) box of sizeL are shown to be expandable in an asymptotic power series of 1/L. The coefficien...

M. Lüscher in Communications in Mathematical Physics (1986)

Article

Volume dependence of the energy spectrum in massive quantum field theories

Due to polarization effects, the massM of a stable particle in a quantum field theory enclosed in a large (space-like) box of sizeL and periodic boundary conditions in general differs from its infinite volume val...

M. Lüscher in Communications in Mathematical Physics (1986)

Article

On-shell improved lattice gauge theories

By means of a spectrum conserving transformation, we show that one of the 3 coefficients in Symanzik's improved action can be chosen freely, if only spectral quantities (masses of stable particles, heavy quark...

M. Lüscher, P. Weisz in Communications in Mathematical Physics (1985)

Chapter

On-shell Improved Lattice Gauge Theories

By means of a spectrum conserving transformation, we show that one of the 3 coefficients in Symanzik’s improved action can be chosen freely, if only spectral quantities (masses of stable particles, heavy quark...

M. Lüscher, P. Weisz in Quantum Field Theory (1985)

Chapter

On a Relation Between Finite Size Effects and Elastic Scattering Processes

Finite volume effects on the mass spectrum of massive quantum field theories (including QCD) are shown to be related to forward scattering amplitudes of the infinite volume theory. Using theoretical and experi...

M. Lüscher in Progress in Gauge Field Theory (1984)

Article

Buchbesprechungen

P. Läuchli, T. Gerber, Russell A. Johnson… in Zeitschrift für angewandte Mathematik und … (1983)

Article

Topology of lattice gauge fields

Non-Abelian gauge fields on a four-dimensional hypercubic lattice with small action density [Tr{U( \(\dot p\) )} for ...

M. Lüscher in Communications in Mathematical Physics (1982)

Chapter

Exact Instanton Gases

A brief summary of recent exact calculations of quantum fluctuations about multi-instanton configurations in non-linear σ -models and Yang-Mills theories is given.

M. Lüscher in Recent Developments in Gauge Theories (1980)

Article

Computation of quantum fluctuations around multi-instanton fields from exact Green's functions: TheCP ⁿ⁻¹ Case

We calculate exactly the contribution of instanton fields to the partition function of ℂℙ ⁿ⁻¹ models in two dimensions. Forn=2, the pure instanton gas is infrared finite, infinitely dense and generates a mass dyn...

B. Berg, M. Lüscher in Communications in Mathematical Physics (1979)

Article

Construction of a selfadjoint, strictly positive transfer matrix for Euclidean lattice gauge theories

It is shown that physical positivity holds in Wilson's lattice gauge theories, i.e. transition probabilities between gauge invariant states are non-negative and the quantum mechanical Hamiltonian has real eige...

M. Lüscher in Communications in Mathematical Physics (1977)

Article

Juvenile hormone, vitellogenin and haemocyte composition in winter worker honeybees (Apis mellifera)

The haemolymph of winter bees (long life span) in contrast to that of summer bees (short life span) has a low juvenile hormone titre and a high protein titre. It is suggested that the winter bee physiology may...

P. Fluri, H. Wille, L. Gerig, M. Lüscher in Experientia (1977)

Chapter

Dynamical Conservation Laws in the Quantized Massive Thirring Model

It has been shown recently by A. Luther [1] that the quantized, renormalized massive Thirring model can be considered as the continuum limit of a tractable lattice quantum field theory. This latter model lives...

M. Lüscher in New Developments in Quantum Field Theory a… (1977)

Article

Operator product expansions on the vacuum in conformal quantum field theory in two spacetime dimensions

Let ϕ₁(x) and ϕ₂(y) be two local fields in a conformal quantum field theory (CQFT) in two dimensional spacetime. It is then shown that the vector-valued distribution ϕ₁(x)ϕ₂(y)|0〉 is a boundary value of a vectorv...

M. Lüscher in Communications in Mathematical Physics (1976)

Article

Global conformal invariance in quantum field theory

Suppose that there is given a Wightman quantum field theory (QFT) whose Euclidean Green functions are invariant under the Euclidean conformal group ...

M. Lüscher, G. Mack in Communications in Mathematical Physics (1975)

Chapter and Conference Paper

Hysterese der Ad- und Desorption an Stoffen mit variablen Hohlraumstrukturen

H. W. Kohlschütter, R. Signer, M. Lüscher in Strukturen von Polymer-Systemen (1975)