We study entanglement created between two isolated qubits by interaction with entangled-photon pairs obtained by parametric down-conversion of a laser pump field. The induced entanglement is quantified using the mixed state Concurrence proposed by Wootters et al. [Phys. Rev. Lett. 78, 5022 (1997)]. A universal value of qubit-entanglement, which is independent on the photon-pair wavefunction is identified to leading order in the qubit–field interaction and the pump field amplitude. The qubit entanglement decreases at higher laser pump intensities due to interference between the entangled photon pairs, which creates excitations in the qubit system. Maximal Concurrence is produced by only generating coherences between the ground and the highest excited qubit states.

Topics
Spectroscopy, Nonlinear optics applications, Parametric down conversion, Photonic entanglement, Quantum entanglement
1.
G. S.
Agarwal
,
Quantum Optics
(
Cambridge University Press
,
2013
).
Google Scholar
 
2.
D.
Bouwmeester
,
J.-W.
Pan
,
K.
Mattle
,
M.
Eibl
,
H.
Weinfurter
, and
A.
Zeilinger
,
Nature
390
,
575
(
1997
).
https://doi.org/10.1038/37539
Google Scholar
Crossref
Search ADS
 
3.
P. G.
Kwiat
,
K.
Mattle
,
H.
Weinfurter
,
A.
Zeilinger
,
A. V.
Sergienko
, and
Y.
Shih
,
Phys. Rev. Lett.
75
,
4337
(
1995
).
https://doi.org/10.1103/PhysRevLett.75.4337
Google Scholar
Crossref
Search ADS
PubMed
 
4.
C.
Fabre
 and
N.
Treps
,
Rev. Mod. Phys.
92
,
035005
(
2020
).
https://doi.org/10.1103/RevModPhys.92.035005
Google Scholar
Crossref
Search ADS
 
5.
S. P.
Walborn
,
C. H.
Monken
,
S.
Padua
, and
P. H.
Souto Ribeiro
,
Phys. Rep.
495
,
87
(
2010
).
https://doi.org/10.1016/j.physrep.2010.06.003
Google Scholar
Crossref
Search ADS
 
6.
Q.
Li
,
K.
Orcutt
,
R. L.
Cook
,
J. S.
Chesterking
,
A. L.
Tong
,
G. S. S.
Cohen
,
X.
Zhang
,
G. R.
Fleming
, and
K. B.
Whaley
,
Nature
619
,
300
(
2023
).
https://doi.org/10.1038/s41586-023-06121-5
Google Scholar
Crossref
Search ADS
PubMed
 
7.
L.
Moretti
 et al,
J. Chem. Phys.
159
,
084201
(
2023
).
https://doi.org/10.1063/5.0156598
Google Scholar
Crossref
Search ADS
PubMed
 
8.
K. E.
Dorfman
,
F.
Schlawin
, and
S.
Mukamel
,
Rev. Mod. Phys.
88
,
045008
(
2016
).
https://doi.org/10.1103/RevModPhys.88.045008
Google Scholar
Crossref
Search ADS
 
9.
S.
Mukamel
 et al,
J. Phys. B
53
,
072002
(
2020
).
https://doi.org/10.1088/1361-6455/ab69a8
Google Scholar
Crossref
Search ADS
 
10.
Z.
Zhang
,
T.
Peng
,
X.
Nie
,
G. S.
Agarwal
, and
M. O.
Scully
,
Light: Sci. Appl.
11
,
274
(
2022
).
https://doi.org/10.1038/s41377-022-00953-y
Google Scholar
Crossref
Search ADS
PubMed
 
11.
C. K.
Law
,
I. A.
Walmsley
, and
J. H.
Eberly
,
Phys. Rev. Lett.
84
,
5304
(
2000
).
https://doi.org/10.1103/PhysRevLett.84.5304
Google Scholar
Crossref
Search ADS
PubMed
 
12.
W. P.
Grice
 and
I. A.
Walmsley
,
Phys. Rev. A
56
,
1627
(
1997
).
https://doi.org/10.1103/PhysRevA.56.1627
Google Scholar
Crossref
Search ADS
 
13.
R.
Horodecki
,
P.
Horodecki
,
M.
Horodecki
, and
K.
Horodecki
,
Rev. Mod. Phys.
81
,
865
(
2009
).
https://doi.org/10.1103/RevModPhys.81.865
Google Scholar
Crossref
Search ADS
 
14.
B.
Kraus
 and
J. I.
Cirac
,
Phys. Rev. Lett.
92
,
013602
(
2004
).
https://doi.org/10.1103/PhysRevLett.92.013602
Google Scholar
Crossref
Search ADS
PubMed
 
15.
M.
Paternostro
,
W.
Son
, and
M. S.
Kim
,
Phys. Rev. Lett.
92
,
197901
(
2004
).
https://doi.org/10.1103/PhysRevLett.92.197901
Google Scholar
Crossref
Search ADS
PubMed
 
16.
M.
Paternostro
,
W.
Son
,
M. S.
Kim
,
G.
Falci
, and
G.
Massimo Palma
,
Phys. Rev. A
70
,
022320
(
2004
).
https://doi.org/10.1103/PhysRevA.70.022320
Google Scholar
Crossref
Search ADS
 
17.
J.
Zou
,
J.
Gang Li
,
B.
Shao
,
J.
Li
, and
Q.
ShuLi
,
Phys. Rev. A
73
,
042319
(
2006
).
https://doi.org/10.1103/PhysRevA.73.042319
Google Scholar
Crossref
Search ADS
 
18.
S. L. N.
Hermans
,
M.
Pompili
,
L.
Dos Santos Martins
,
A. R.-P.
Montblanch
,
H. K. C.
Beukers
,
S.
Baier
,
J.
Borregaard
, and
R.
Hanson
,
New J. Phys.
25
,
013011
(
2023
).
https://doi.org/10.1088/1367-2630/acb004
Google Scholar
Crossref
Search ADS
 
19.
W.
Lu
,
C.
Zhai
,
H.
Tao
,
Y.
Song
,
S.
Tang
, and
L.
Xu
, “
Single-photon triggered quantum entanglement between two qubits or at least 2000 identical qubits
,” arXiv:2406.13198 (
2024
).
Google Scholar
 
20.
C. H.
Bennett
,
D. P.
DiVincenzo
,
J. A.
Smolin
, and
W. K.
Wootters
,
Phys. Rev. A
54
,
3824
(
1996
).
https://doi.org/10.1103/PhysRevA.54.3824
Google Scholar
Crossref
Search ADS
PubMed
 
21.
T.
Wellens
 and
M.
Kus
,
Phys. Rev. A
64
,
052302
(
2001
).
https://doi.org/10.1103/PhysRevA.64.052302
Google Scholar
Crossref
Search ADS
 
22.
S.
Hill
 and
W. K.
Wootters
,
Phys. Rev. Lett.
78
,
5022
(
1997
).
https://doi.org/10.1103/PhysRevLett.78.5022
Google Scholar
Crossref
Search ADS
 
23.
W. K.
Wootters
,
Phys. Rev. Lett.
80
,
2245
(
1998
).
https://doi.org/10.1103/PhysRevLett.80.2245
Google Scholar
Crossref
Search ADS
 
25.
R. F.
Werner
,
Phys. Rev. A
40
,
4277
(
1989
).
https://doi.org/10.1103/PhysRevA.40.4277
Google Scholar
Crossref
Search ADS
 
26.
W. J.
Munro
,
D. F. V.
James
,
A. G.
White
, and
P. G.
Kwiat
,
Phys. Rev. A
64
,
030302
(
2001
).
https://doi.org/10.1103/PhysRevA.64.030302
Google Scholar
Crossref
Search ADS
 
27.
A.
Christ
,
K.
Laiho
,
A.
Eckstein
,
K. N.
Cassemiro
, and
C.
Silberhorn
,
New J. Phys.
13
,
033027
(
2011
).
https://doi.org/10.1088/1367-2630/13/3/033027
Google Scholar
Crossref
Search ADS
 
28.
F.
Schlawin
 and
S.
Mukamel
,
J. Phys. B: At. Mol. Opt. Phys.
46
,
175502
(
2013
).
https://doi.org/10.1088/0953-4075/46/17/175502
Google Scholar
Crossref
Search ADS
 
29.
S.
Mukamel
,
Principles of Nonlinear Optical Spectroscopy
(
Oxford University Press
,
New York
,
1995
).
Google Scholar
 
30.
U.
Harbola
 and
S.
Mukamel
,
Phys. Rep.
465
,
191
(
2008
).
https://doi.org/10.1016/j.physrep.2008.05.003
Google Scholar
Crossref
Search ADS
 
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