Entanglement Distillation Protocols and Number Theory

@misc{citeulike:110315, abstract = {We show that the analysis of entanglement distillation protocols for qudits of arbitrary dimension \$D\$ benefits from applying basic concepts from number theory, since the set \$\zdn\$ associated to Bell diagonal states is a module rather than a vector space. We find that a partition of \$\zdn\$ into divisor classes characterizes the invariant properties of mixed Bell diagonal states under local permutations. We construct a very general class of recursion protocols by means of unitary operations implementing these local permutations. We study these distillation protocols depending on whether we use twirling operations in the intermediate steps or not, and we study them both analitically and numerically with Monte Carlo methods. In the absence of twirling operations, we construct extensions of the quantum privacy algorithms valid for secure communications with qudits of any dimension \$D\$. When \$D\$ is a prime number, we show that distillation protocols are optimal both qualitatively and quantitatively.}, author = {Bombin, H. and Martin-Delgado, M. }, citeulike-article-id = {110315}, eprint = {quant-ph/0503013}, keywords = {entanglement, number, theory}, month = {March}, posted-at = {2005-03-02 09:30:21}, priority = {2}, title = {Entanglement Distillation Protocols and Number Theory}, url = {http://arxiv.org/abs/quant-ph/0503013}, year = {2005} }

TY - ELEC ID - citeulike:110315 L3 - citeulike-article-id:110315 TI - Entanglement Distillation Protocols and Number Theory N2 - We show that the analysis of entanglement distillation protocols for qudits of arbitrary dimension $D$ benefits from applying basic concepts from number theory, since the set $\zdn$ associated to Bell diagonal states is a module rather than a vector space. We find that a partition of $\zdn$ into divisor classes characterizes the invariant properties of mixed Bell diagonal states under local permutations. We construct a very general class of recursion protocols by means of unitary operations implementing these local permutations. We study these distillation protocols depending on whether we use twirling operations in the intermediate steps or not, and we study them both analitically and numerically with Monte Carlo methods. In the absence of twirling operations, we construct extensions of the quantum privacy algorithms valid for secure communications with qudits of any dimension $D$. When $D$ is a prime number, we show that distillation protocols are optimal both qualitatively and quantitatively. KW - entanglement KW - number KW - theory AU - Bombin, H AU - Martin-Delgado, M PY - 2005/03/01/ UR - http://arxiv.org/abs/quant-ph/0503013 ER -