TY - JOUR
T1 - Replacing measurement feedback with coherent feedback for quantum state preparation
AU - Kashiwamura, Yoshiki
AU - Yamamoto, Naoki
N1 - Funding Information:
This work was supported in part by Japan Society for the Promotion of Science Grant-in-Aid Grant No. 15K06151 and Japan Science and Technology Agency Precursory Research for Embryonic Science and Technology Grant No. JPMJPR166A. N.Y. acknowledges helpful discussions with M. Takeuchi.
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/6/26
Y1 - 2018/6/26
N2 - Measurement feedback is a versatile and powerful tool, although its performance is limited by several practical imperfections resulting from classical components. This paper shows that, for some typical quantum feedback control problems for state preparation (stabilization of a qubit or a qutrit, spin squeezing, and Fock state generation), the classical feedback operation can be replaced by a fully quantum one such that the state autonomously dissipates into the target or a state close to the target. The main common feature of the proposed quantum operation, which is called coherent feedback, is that it is composed of a series of dispersive and dissipative couplings inspired by the corresponding measurement feedback scheme.
AB - Measurement feedback is a versatile and powerful tool, although its performance is limited by several practical imperfections resulting from classical components. This paper shows that, for some typical quantum feedback control problems for state preparation (stabilization of a qubit or a qutrit, spin squeezing, and Fock state generation), the classical feedback operation can be replaced by a fully quantum one such that the state autonomously dissipates into the target or a state close to the target. The main common feature of the proposed quantum operation, which is called coherent feedback, is that it is composed of a series of dispersive and dissipative couplings inspired by the corresponding measurement feedback scheme.
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U2 - 10.1103/PhysRevA.97.062341
DO - 10.1103/PhysRevA.97.062341
M3 - Article
AN - SCOPUS:85049397684
VL - 97
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 6
M1 - 062341
ER -