Tripartite entanglement transformations and tensor rank

Tripartite entanglement transformations and tensor rank. Chitambar, E., Duan, R., & Shi, Y. Physical Review Letters, 101(14):1-4, 2008.

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A basic question regarding quantum entangled states is whether one can be probabilistically converted to another through local operations and classical communication exclusively. While the answer for bipartite systems is known, we show that for tripartite systems, this question encodes some of the most challenging open problems in mathematics and computer science. In particular, we show that there is no easy general criterion to determine the feasibility, and in fact, the problem is NP hard. In addition, we find obtaining the most efficient algorithm for matrix multiplication to be precisely equivalent to determining the maximum rate to convert the Greenberger-Horne-Zeilinger state to a triangular distribution of three EPR states. Our results are based on connections between multipartite entanglement and tensor rank (also called Schmidt rank), a key concept in algebraic complexity theory. © 2008 The American Physical Society.

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 title = {Tripartite entanglement transformations and tensor rank},
 type = {article},
 year = {2008},
 pages = {1-4},
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 abstract = {A basic question regarding quantum entangled states is whether one can be probabilistically converted to another through local operations and classical communication exclusively. While the answer for bipartite systems is known, we show that for tripartite systems, this question encodes some of the most challenging open problems in mathematics and computer science. In particular, we show that there is no easy general criterion to determine the feasibility, and in fact, the problem is NP hard. In addition, we find obtaining the most efficient algorithm for matrix multiplication to be precisely equivalent to determining the maximum rate to convert the Greenberger-Horne-Zeilinger state to a triangular distribution of three EPR states. Our results are based on connections between multipartite entanglement and tensor rank (also called Schmidt rank), a key concept in algebraic complexity theory. © 2008 The American Physical Society.},
 bibtype = {article},
 author = {Chitambar, Eric and Duan, Runyao and Shi, Yaoyun},
 doi = {10.1103/PhysRevLett.101.140502},
 journal = {Physical Review Letters},
 number = {14}
}

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