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We calculate the exact values of the holomorphic observables of N = 4 supersymmetric SU(N) Yang-Mills theory deformed by mass terms which preserve N = 1 SUSY. These include the chiral condensates in each massive vacuum of the theory as well as the central charge which determines the tension of BPS saturated domain walls interpolating between these vacua. Several unexpected features emerge in the large-N limit, including anomalous modular properties under an SL(2, Z) duality group which acts on a complexification of the 't Hooft coupling λ = g 2 N/4π.

PACS. 03.65Bz -Foundations, theory of measurement, miscellaneous theories (including Aharonov-Bohm effect, Bell inequalities, Berry's phase).Abstract. -We show that the spontaneous-emission process could be altered by continuously monitoring the emitting system by means of a spherical counter of quantum efficiency η < 1, placed at a finite distance L. This surprising result is related neither to Zeno's effect nor to any cavity effect, but is of intrinsically quantum-mechanical non-local nature.