4 citations · 4 across the 4 of their papers we have counts for
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Non-selfadjoint perturbations of selfadjoint operators in 2 dimensions IIIa. One branching point
M. Hitrik, J. Sjoestrand
This is the third in a series of works devoted to spectral asymptotics for non-selfadjoint perturbations of selfadjoint -pseudodifferential operators in dimension 2. We assume t…
Diophantine tori and spectral asymptotics for non-selfadjoint operators
Michael Hitrik, Johannes Sjoestrand, San Vu Ngoc
We study spectral asymptotics for small non-selfadjoint perturbations of selfadjoint -pseudodifferential operators in dimension 2, assuming that the classical flow of the unpert…
Non-selfadjoint perturbations of selfadjoint operators in 2 dimensions II. Vanishing Averages
Michael Hitrik, Johannes Sjoestrand
This is the second in a series of works devoted to small non-selfadjoint perturbations of selfadjoint semiclassical pseudodifferential operators in dimension 2. As in our previous…
Birkhoff Normal Forms in Semi-Classical Inverse Problems
A. Iantchenko, J. Sjoestrand, M. Zworski
We apply recent results on semi-classical trace formulae and on Birkhoff normal forms for semi-classical Fourier integral operators to a wide range of semi-classical and high energ…