TY - JOUR
T1 - Aligning reference frames with quantum states
AU - Bagan, E.
AU - Baig, M.
AU - Muñoz-Tapia, R.
PY - 2001/12/17
Y1 - 2001/12/17
N2 - We analyze the problem of sending, in a single transmission, the information required to specify an orthogonal trihedron or reference frame through a quantum channel made out of N elementary spins. We analytically obtain the optimal strategy, i.e., the best encoding state and the best measurement. For large N, we show that the average error goes to zero linearly in 1/N. Finally, we discuss the construction of finite optimal measurements. © 2001 The American Physical Society.
AB - We analyze the problem of sending, in a single transmission, the information required to specify an orthogonal trihedron or reference frame through a quantum channel made out of N elementary spins. We analytically obtain the optimal strategy, i.e., the best encoding state and the best measurement. For large N, we show that the average error goes to zero linearly in 1/N. Finally, we discuss the construction of finite optimal measurements. © 2001 The American Physical Society.
UR - https://www.scopus.com/pages/publications/85037242667
U2 - 10.1103/PhysRevLett.87.257903
DO - 10.1103/PhysRevLett.87.257903
M3 - Article
SN - 0031-9007
VL - 87
SP - 257903-1-257903-4
JO - Physical Review Letters
JF - Physical Review Letters
IS - 25
ER -