Sökning: "Jan Björk"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden Jan Björk.

1. 1. Studies on familial adenomatous polyposis

   Författare :Jan Björk; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Familial adenomatous polyposis (FAP) is a hereditary disorder caused by mutations in the adenomatous polyposis coli (APC) gene, which leads to adenoma formation and subsequently to cancer, predominantly in the colon and the rectum but also in the duodenum. The cancer morbidity and mortality can be decreased by presymtomatic screening and surgical treatment. LÄS MER

3. 2. Chain conditions of associative rings

   Författare :Jan-Erik Björk; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : .... LÄS MER

4. 3. On the Extension and Wedge Product of Positive Currents

   Författare :Ahmad Khalid Al Abdulaali; Jan-Erik Björk; Hassine El Mir; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Closed positive currents; plurisubharmonic currents; plurisubharmonic functions; pluripolar sets; k-convex functions; wedge product of currents; Mathematics; matematik;

   Sammanfattning : This dissertation is concerned with extensions and wedge products of positive currents. Our study can be considered as a generalization for classical works done earlier in this field. Paper I deals with the extension of positive currents across different types of sets. LÄS MER

5. 4. Quantum error correction

   Författare :Jonas Almlöf; Gunnar Björk; Marcin Swillo; Jan-Åke Larsson; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics;

   Sammanfattning : Quantum error correction is the art of protecting quantum states from the detrimental influence from the environment. To master this art, one must understand how the system interacts with the environment and gives rise to a full set of quantum phenomena, many of which have no correspondence in classical information theory. LÄS MER

7. 5. Quantum error correction

   Författare :Jonas Almlöf; Gunnar Björk; Jan-Åke Larsson; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum error correction; dissipative channel; decoherence; fidelity; mutual information;

   Sammanfattning : This thesis intends to familiarise the reader with quantum error correction, and also show some relations to the well known concept of information - and the lesser known quantum information. Quantum information describes how information can be carried by quantum states, and how interaction with other systems give rise to a full set of quantum phenomena, many of which have no correspondence in classical information theory. LÄS MER