Exponential asymptotics predict the eigenvalues of H = p² + x²(ix)^ε for ε < 0 with excellent agreement to numerical results.
The exponential asymp- totic techniques we have presented provide a more powerful and general framework than the traditional WKB analysis of (3)
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Exponential asymptotics for the eigenvalues in the broken PT-symmetric region
Exponential asymptotics predict the eigenvalues of H = p² + x²(ix)^ε for ε < 0 with excellent agreement to numerical results.