Purification of Single Qubits and reconstruction from Post-Measurement State
| dc.creator | Dhara, Chirag | |
| dc.creator | Dass, N. D. Hari | |
| dc.date | 2004-06-23 | |
| dc.date.accessioned | 2026-07-07T06:09:59Z | |
| dc.date.available | 2026-07-07T06:09:59Z | |
| dc.description | Purification of mixed states in Quantum Mechanics, by which we mean the transformation into pure states, has been viewed as an {\it Operation} in the sense of Kraus et al and explicit {\it Kraus Operators} \cite{kra1,kra2,kra3} have been constructed for two seperate purification protocols. The first one, initially due to Schrodinger \cite{sch} and subsequently elaborated by Sudarshan et al \cite{sudar}, is based on the {\it preservation of probabilities}. We have constructed a second protocol here based on {\it optimization of fidelities}. Both purification protocols have been implemented on a single qubit in an attempt to improve the fidelity of the purified post measurement state of the qubit with the initial pure state. We have considered both {\it complete} and {\it partial} measurements and have established bounds and inequalities for various fidelities. We show that our purification protocol leads to better state reconstruction, most explicitly so, when partial measurements are made. | |
| dc.description | 6 pages in REVTEX | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0406170 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0406170 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/92151 | |
| dc.subject | Quantum Physics | |
| dc.title | Purification of Single Qubits and reconstruction from Post-Measurement State | |
| dc.type | text |