1 Introduction ................................................. 5
2 Preliminaries ................................................ 9
3 Matrix valued pseudodifferential operators .................. 10
3.1 Operators and symbols .................................. 10
3.2 Asymptotic series ...................................... 12
3.3 Inverses ............................................... 13
3.4 Semiclassical wavefront set ............................ 13
3.5 Helffer-Robert-Sjöstrand calculus ...................... 14
4 Framework and assumptions ................................... 14
4.1 Matrix valued black box framework ...................... 14
4.2 Complex scaling ........................................ 15
4.3 Resonances and resonant states ......................... 16
4.4 Reference operator ..................................... 17
5 Results ..................................................... 18
5.1 Individual resonances. The case R'0 < R1 ............... 18
5.2 Individual resonances. The case R1 < R'0 ............... 18
5.3 Clusters of resonances. The case R'0 < R1 .............. 19
5.4 Clusters of resonances. The case R1 < R'0 .............. 20
6 Cutoff resolvent estimate ................................... 20
7 Hamiltonians with complex absorbing potentials .............. 24
8 Eigenvalue estimate on a rectangle .......................... 28
9 Quasimodes .................................................. 31
10 Individual resonances. The case R'0 < Ri .................... 34
11 Individual resonances. The case R1 < R'0 .................... 37
12 Clusters of resonances ...................................... 41
A Auxiliary results ........................................... 50
A.l. Meromorphic extension .................................. 50
A.2. Properties of reference operator ....................... 51
B Operator valued semiclassical maximum principle ............. 52
References ..................................................... 55
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