dc.contributor.author |
Shukla, Abhishek |
en_US |
dc.contributor.author |
Rao, K. Rama Koteswara |
en_US |
dc.contributor.author |
MAHESH, T. S. |
en_US |
dc.date.accessioned |
2019-02-14T05:02:28Z |
|
dc.date.available |
2019-02-14T05:02:28Z |
|
dc.date.issued |
2013-06 |
en_US |
dc.identifier.citation |
Physical Review A, 87(6),062317. |
en_US |
dc.identifier.issn |
1050-2947 |
en_US |
dc.identifier.issn |
1094-1622 |
en_US |
dc.identifier.uri |
http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/1663 |
|
dc.identifier.uri |
https://doi.org/10.1103/PhysRevA.87.062317 |
en_US |
dc.description.abstract |
The standard method of quantum state tomography (QST) relies on the measurement of a set of noncommuting observables, realized in a series of independent experiments. Ancilla-assisted QST (AAQST) proposed by Nieuwenhuizen and co-workers [Phys. Rev. Lett. 92, 120402 (2004)] greatly reduces the number of independent measurements by exploiting an ancilla register in a known initial state. In suitable conditions AAQST allows mapping out density matrix of an input register in a single experiment. Here we describe methods for explicit construction of AAQST experiments in multiqubit registers. We also report nuclear magnetic resonance studies on AAQST of (i) a two-qubit input register using a one-qubit ancilla in an isotropic liquid-state system and (ii) a three-qubit input register using a two-qubit ancilla register in a partially oriented system. The experimental results confirm the effectiveness of AAQST in such multiqubit registers. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
American Physical Society |
en_US |
dc.subject |
Ancilla-assisted quantum |
en_US |
dc.subject |
Multiqubit registers |
en_US |
dc.subject |
AAQST |
en_US |
dc.subject |
Multiqubit registers |
en_US |
dc.subject |
Nieuwenhuizen |
en_US |
dc.subject |
2013 |
en_US |
dc.title |
Ancilla-assisted quantum state tomography in multiqubit registers |
en_US |
dc.type |
Article |
en_US |
dc.contributor.department |
Dept. of Physics |
en_US |
dc.identifier.sourcetitle |
Physical Review A |
en_US |
dc.publication.originofpublisher |
Foreign |
en_US |