Zafar Ahmed 2009 J. Phys. A: Math. Theor. 42 472005 doi:10.1088/1751-8113/42/47/472005
Zero width resonance (spectral singularity) in a complex PT-symmetric potential
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We show that the complex PT-symmetric potential V(x) = −V1 sech2x + iV2 sech xtanh x entails a single zero-width resonance (spectral singularity) when 
and the positive resonant energy is given as ![E_*={1 \over 4}[|V_2|-(1/4+V_1)]](http://ej.iop.org/images/1751-8121/42/47/472005/jpa328177ieqn2.gif)
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- PACS
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11.30.Er Charge conjugation, parity, time reversal, and other discrete symmetries
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- Dates
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Issue 47 (27 November 2009)
Received 12 August 2009, in final form 17 October 2009
Published 9 November 2009
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Zero width resonance (spectral singularity) in a complex PT-symmetric potential
Zafar Ahmed 2009 J. Phys. A: Math. Theor. 42 472005
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