Abstract
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.
| Original language | English |
|---|---|
| Article number | 062341 |
| Journal | Physical Review A |
| Volume | 97 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2018 Jun 26 |
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ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Replacing measurement feedback with coherent feedback for quantum state preparation. / Kashiwamura, Yoshiki; Yamamoto, Naoki.
In: Physical Review A, Vol. 97, No. 6, 062341, 26.06.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Replacing measurement feedback with coherent feedback for quantum state preparation
AU - Kashiwamura, Yoshiki
AU - Yamamoto, Naoki
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.
UR - http://www.scopus.com/inward/record.url?scp=85049397684&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049397684&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.97.062341
DO - 10.1103/PhysRevA.97.062341
M3 - Article
VL - 97
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 6
M1 - 062341
ER -