State estimation in quantum homodyne tomography with noisy data
State estimation in quantum homodyne tomography with noisy data
复制标题
带有噪声数据的量子零差断层扫描的状态估计
DOI:
10.1088/0266-5611/25/1/015003
复制
发表时间:
2008
期刊:
影响因子:
2.1
通讯作者:
Katia M'eziani
中科院分区:
文献类型:
--
作者:
J. Aubry;C. Butucea;Katia M'eziani
In the framework of noisy quantum homodyne tomography with efficiency parameter 0 < η ⩽ 1, we propose two estimators of a quantum state whose density matrix elements ρm,n decrease as , for fixed known B > 0 and 0 < r ⩽ 2. The first procedure estimates the matrix coefficients by a projection method on the pattern functions (that we introduce here for 0 < η ⩽ 1/2), the second procedure is a kernel estimator of the associated Wigner function. We compute the convergence rates of these estimators, in risk.