Abstract
A scheme for measuring the purity of a quantum system with a finite number of levels is presented. The method makes use of two √swap gates and hinges only on measurements performed on a reference system, prepared in a certain pure state and coupled with the target system. Neither tomographic methods, with the complete reconstruction of the state, nor interferometric setups are needed.
| Original language | English |
|---|---|
| Article number | 042316 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 85 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2012 Apr 16 |
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ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Measurement scheme for purity based on two two-body gates. / Nakazato, Hiromichi; Tanaka, T.; Yuasa, Kazuya; Florio, G.; Pascazio, S.
In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 85, No. 4, 042316, 16.04.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Measurement scheme for purity based on two two-body gates
AU - Nakazato, Hiromichi
AU - Tanaka, T.
AU - Yuasa, Kazuya
AU - Florio, G.
AU - Pascazio, S.
PY - 2012/4/16
Y1 - 2012/4/16
N2 - A scheme for measuring the purity of a quantum system with a finite number of levels is presented. The method makes use of two √swap gates and hinges only on measurements performed on a reference system, prepared in a certain pure state and coupled with the target system. Neither tomographic methods, with the complete reconstruction of the state, nor interferometric setups are needed.
AB - A scheme for measuring the purity of a quantum system with a finite number of levels is presented. The method makes use of two √swap gates and hinges only on measurements performed on a reference system, prepared in a certain pure state and coupled with the target system. Neither tomographic methods, with the complete reconstruction of the state, nor interferometric setups are needed.
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U2 - 10.1103/PhysRevA.85.042316
DO - 10.1103/PhysRevA.85.042316
M3 - Article
AN - SCOPUS:84860204500
VL - 85
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 4
M1 - 042316
ER -