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Title: Direct measurement of concurrence for atomic two-qubit pure states

Abstract

We propose a general scheme to measure the concurrence of an arbitrary two-qubit pure state in atomic systems. The protocol is based on one- and two-qubit operations acting on two available copies of the bipartite system, and followed by a global qubit readout. We show that it is possible to encode the concurrence in the probability of finding all atomic qubits in the ground state. Two possible scenarios are considered: atoms crossing three-dimensional microwave cavities and trapped ion systems.

Authors:
; ; ;  [1];  [2];  [3]
  1. Departamento de Fisica, Universidad de Santiago de Chile, Casilla 307 Correo 2, Santiago (Chile)
  2. Physics Department, ASC, and CeNS, Ludwig-Maximilians-Universitaet, Theresienstrasse 37, D-80333 Munich (Germany)
  3. (Peru)
Publication Date:
OSTI Identifier:
20982249
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.75.032303; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOMS; GROUND STATES; IONS; MICROWAVE RADIATION; PROBABILITY; QUANTUM COMPUTERS; QUANTUM ENTANGLEMENT; QUBITS; THREE-DIMENSIONAL CALCULATIONS; TRAPPING

Citation Formats

Romero, G., Lopez, C. E., Lastra, F., Retamal, J. C., Solano, E., and Seccion Fisica, Departamento de Ciencias, Pontificia Universidad Catolica del Peru, Apartado 1761, Lima. Direct measurement of concurrence for atomic two-qubit pure states. United States: N. p., 2007. Web. doi:10.1103/PHYSREVA.75.032303.
Romero, G., Lopez, C. E., Lastra, F., Retamal, J. C., Solano, E., & Seccion Fisica, Departamento de Ciencias, Pontificia Universidad Catolica del Peru, Apartado 1761, Lima. Direct measurement of concurrence for atomic two-qubit pure states. United States. doi:10.1103/PHYSREVA.75.032303.
Romero, G., Lopez, C. E., Lastra, F., Retamal, J. C., Solano, E., and Seccion Fisica, Departamento de Ciencias, Pontificia Universidad Catolica del Peru, Apartado 1761, Lima. Thu . "Direct measurement of concurrence for atomic two-qubit pure states". United States. doi:10.1103/PHYSREVA.75.032303.
@article{osti_20982249,
title = {Direct measurement of concurrence for atomic two-qubit pure states},
author = {Romero, G. and Lopez, C. E. and Lastra, F. and Retamal, J. C. and Solano, E. and Seccion Fisica, Departamento de Ciencias, Pontificia Universidad Catolica del Peru, Apartado 1761, Lima},
abstractNote = {We propose a general scheme to measure the concurrence of an arbitrary two-qubit pure state in atomic systems. The protocol is based on one- and two-qubit operations acting on two available copies of the bipartite system, and followed by a global qubit readout. We show that it is possible to encode the concurrence in the probability of finding all atomic qubits in the ground state. Two possible scenarios are considered: atoms crossing three-dimensional microwave cavities and trapped ion systems.},
doi = {10.1103/PHYSREVA.75.032303},
journal = {Physical Review. A},
number = 3,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}