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Hypercyclic Conjugate Operators
Authors:Henrik Petersson
Institution:1.School of Mathematical Sciences,Chalmers/G?teborg University,G?teborg,Sweden
Abstract:We prove that for any weighted backward shift B = Bw on an infinite dimensional separable Hilbert space H whose weight sequence w = (wn) satisfies $$ \sup_{n} {\left| {w_{1} w_{2} \ldots w_{n} } \right|} = \infty $$
, the conjugate operator $$ C_{B} :S \mapsto BSB^{*} $$ is hypercyclic on the space S(H) of self-adjoint operators on H provided with the topology of uniform convergence on compact sets. That is, there exists an 
$$ S \in S(H) $$
such that 
$$ \{ C^{n}_{B} (S) = B^{n} SB^{*n}\} _{{n \geq 0}} $$
is dense in S(H). We generalize the result to more general conjugate maps 
$$ S \mapsto TST^{*} $$
, and establish similar results for other operator classes in the algebra B(H) of bounded operators, such as the ideals K(H) and N(H) of compact and nuclear operators respectively.
Keywords:Mathematics Subject Classification (2000)" target="_blank">Mathematics Subject Classification (2000)    47A16  47B49  47A58  47L10  47B10
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