288 citations · 605 across the 11 of their papers we have counts for
11 papers
Affine Maps of the Polarization Vector for Quantum Systems of Arbitrary Dimension
Mark S. Byrd, C. Allen Bishop, Yong-Cheng Ou
The operator-sum decomposition (OS) of a mapping from one density matrix to another has many applications in quantum information science. To this mapping there corresponds an affin…
Sufficient conditions placed on initial system-environment states for positive maps
Yong-Cheng Ou, C. Allen Bishop, Mark S. Byrd
A system interacting with its environment will give rise to a quantum evolution. After tracing over the environment the net evolution of the system can be described by a linear Her…
All maps equivalent to a given map, completely positive or not
Yong-Cheng Ou, Mark S. Byrd
A dynamical map is a map which takes one density operator to another. Such a map can be written in an operator-sum representation (OSR) using a spectral decomposition. The method o…
Computable constraints on entanglement-sharing of multipartite quantum states
Yong-Cheng Ou, Mark S. Byrd
Negativity is regarded as an important measure of entanglement in quantum information theory. In contrast to other measures of entanglement, it is easily computable for bipartite s…
High Fidelity State Transfer Over an Unmodulated Linear XY Spin Chain
C. Allen Bishop, Yong-Cheng Ou, Zhao-Ming Wang +1
We provide a class of initial encodings that can be sent with a high fidelity over an unmodulated, linear, XY spin chain. As an example, an average fidelity of ninety-six percent c…
Concurrence and a proper monogamy inequality for arbitrary quantum states
Yong-Cheng Ou, Heng Fan, Shao-Ming Fei
We obtain an analytical lower bound of entanglement quantified by concurrence for arbitrary bipartite quantum states. It is shown that our bound is tight for some mixed states and…