TY - JOUR
T1 - Simulating quantum operations with mixed environments
AU - Terhal, Barbara M.
AU - Chuang, Isaac L.
AU - DiVincenzo, David P.
AU - Grassl, Markus
AU - Smolin, John A.
PY - 1999
Y1 - 1999
N2 - We study the physical quantum resources required to implement general quantum operations, and provide bounds on the minimum possible size which an environment must be in order to perform certain quantum operations. We prove that contrary to a previous conjecture, not all quantum operations on a single qubit can be implemented with a single-qubit environment, even if that environment is initially prepared in a mixed state. We show that a mixed single-qutrit environment is sufficient to implement a special class of operations, the generalized depolarizing channels.
AB - We study the physical quantum resources required to implement general quantum operations, and provide bounds on the minimum possible size which an environment must be in order to perform certain quantum operations. We prove that contrary to a previous conjecture, not all quantum operations on a single qubit can be implemented with a single-qubit environment, even if that environment is initially prepared in a mixed state. We show that a mixed single-qutrit environment is sufficient to implement a special class of operations, the generalized depolarizing channels.
UR - http://www.scopus.com/inward/record.url?scp=0005135565&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.60.881
DO - 10.1103/PhysRevA.60.881
M3 - Article
AN - SCOPUS:0005135565
SN - 1050-2947
VL - 60
SP - 881
EP - 885
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 2
ER -