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SU(2) and SU(1,1) interferometers

Physical Review A, 1986
A Lie-group-theoretical approach to the analysis of interferometers is presented. Conventional interferometers such as the Mach-Zehnder and Fabry-Perot can be characterized by SU(2). We introduce a class of interferometers characterized by SU(1,1). These interferometers employ active elements such as four-wave mixers or degenerate-parametric amplifiers
, Yurke, , McCall, , Klauder
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The SU(4) ⊃ SU(2) ⊗ SU(2) chain

Journal of Mathematical Physics, 1978
We consider the physical SU(4) ⊃ SU(2) ⊗ SU(2) chain. With the help of the three vectors (Sα, Ti, Qαi), (VαS, VtT, VαiQ), (WSα, WiT, WαiQ) we can easily write the three fundamental invariants I2, I3, I4; the two operators Ω and Φ (eigenvalues ω and φ) of Moshinsky and Nagel [Phys. Lett.
A. Partensky, C. Maguin
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SU(2)  × SU(2) scalars in the enveloping algebra of SU(4)

Journal of Mathematical Physics, 1976
We build an integrity basis for the SU(2)  × SU(2) scalars belonging to the enveloping algebra of SU(4). We prove that it contains seven independent invariants in addition to the Casimir operators of SU(4) and SU(2)  × SU(2). We form a complete set of commuting operators by adding to the latter two linear combinations of the former the operators Ω and ...
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Wigner coefficients for SU(6) ⊇ SU(3) ⊗ SU(2)

Journal of Mathematical Physics, 1979
A technique for evaluating the Wigner coeficients for SU(6) with the physically interesting subgroups SU(3) ⊗SU(2) is outlined. Coefficients appropriate for coupling a single quark to a many quark wavefunction are tabulated for functions of nine or fewer quarks.
S. I. So, D. Strottman
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SU(2) and SU(1,1) phase states

Physical Review A, 1990
Phase operators and phase states are introduced in the Hilbert space ${H}_{2j+1}$ associated with the SU(2) group. The phase operators obey the SU(2) algebra and play a dual role to the standard angular-momentum operators. A finite Weyl group plays a fundamental role in those ideas.
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Supersymmetric Savvidy state for SU(2), SU(3), and SU(4)

Physical Review D, 1983
The Savvidy ansatz of a covariantly constant background field in a Yang-Mills theory is used to calculate the one-loop quantum correction to the effective energy density in a supersymmetric gauge theory. This is done, with matter fields included, for the gauge groups SU(2), SU(3), and SU(4).
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Liszt, su vida, su música, sus amores

Books Abroad, 1943
W. K. J., Géza Falk
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Cervantes revisitado: su vida, su obra, su legado

El espacio geográfico manchego está indefectiblemente ligado a la figura de Miguel de Cervantes. Su constitución física y la correspondiente figuración literaria forman parte del imaginario colectivo y constituyen, desde tiempos inmemoriales, una fuente inagotable de inspiración viajera y artística a la cual pretendemos contribuir con el presente ...
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