Please use this identifier to cite or link to this item:
http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/1663
Title: | Ancilla-assisted quantum state tomography in multiqubit registers |
Authors: | Shukla, Abhishek Rao, K. Rama Koteswara MAHESH, T. S. Dept. of Physics |
Keywords: | Ancilla-assisted quantum Multiqubit registers AAQST Multiqubit registers Nieuwenhuizen 2013 |
Issue Date: | Jun-2013 |
Publisher: | American Physical Society |
Citation: | Physical Review A, 87(6),062317. |
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. |
URI: | http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/1663 https://doi.org/10.1103/PhysRevA.87.062317 |
ISSN: | 1050-2947 1094-1622 |
Appears in Collections: | JOURNAL ARTICLES |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.