Catalog of candidate ions for trapped ion quantum computing. The periodic table is shown with the hydrogenic ions highlighted with links to individual pages. Included on each page are energy diagrams for the outer electron for each ion, the relative transition strengths for hyperfine transitions (useful for locating cooling transitions), links to more information about the physical properties, isotope information, and research groups using the ions for various projects. In addition, several two electron ion systems have applications for both quantum computing and optical time standards.
| 1
H
|
2
He
|
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| 3
Li
|
4
BE
|
5
B
|
6
C
|
7
N
|
8
O
|
9
F
|
10
Ne
|
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| 11
Na
|
12
Mg
|
13
Al
|
14
Si
|
15
P
|
16
S
|
17
Cl
|
18
Ar
|
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| 19
K
|
20
Ca
|
21
Sc
|
22
Ti
|
23
V
|
24
Cr
|
25
Mn
|
26
Fe
|
27
Co
|
28
Ni
|
29
Cu
|
30
Zn
|
31
Ga
|
32
Ge
|
33
As
|
34
Se
|
35
Br
|
36
Kr
|
| 37
Rb
|
38
Sr
|
39
Y
|
40
Zr
|
41
Nb
|
42
Mo
|
43
Tc
|
44
Ru
|
45
Rh
|
46
Pd
|
47
Ag
|
48
Cd
|
49
In
|
50
Sn
|
51
Sb
|
52
Te
|
53
I
|
54
Xe
|
| 55
Cs
|
56
Ba
|
57
*La
|
72
Hf
|
73
Ta
|
74
W
|
75
Re
|
76
Os
|
77
Ir
|
78
Pt
|
79
Au
|
80
Hg
|
81
Ti
|
82
Pb
|
83
Bi
|
84
Po
|
85
At
|
86
Rn
|
| 87
Fr
|
88
Ra
|
89
+Ac
|
104
Rf
|
105
Ha
|
106
106
|
107
107
|
108
108
|
109
109
|
110
110
|
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* Lanthanide Series + Actinide Series
| 58
Ce
|
59
Pr
|
60
Nd
|
61
Pm
|
62
Sm
|
63
Eu
|
64
Gd
|
65
Tb
|
66
Dy
|
67
Ho
|
68
Er
|
69
Tm
|
70
Yb
|
71
Lu
|
| 90
Th
|
91
Pa
|
92
U
|
93
Np
|
94
Pu
|
95
Am
|
96
Cm
|
97
Bk
|
98
Cf
|
99
Es
|
100
Fm
|
101
Md
|
102
No
|
103
Lr
|
|
H-gas
|
Li-solid
|
Br-liquid
|
Tc-synthetic
|
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| Group | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 8a’ | 8a” | 1b | 2b | 3b | 4b | 5b | 6b | 7b | 8 | |
| Period | |||||||||||||||||||
| 1 | 1 | 2 | |||||||||||||||||
| 2 | 3 | 4 Be | 5B | 6 | 7 | 8 | 9 | 10 | |||||||||||
| 3 | 11 | 12 Mg | 13 Al | 14 | 15 | 16 | 17 | 18 | |||||||||||
| 4 | 19 | 20 Ca | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 Zn | 31 Ga | 32 | 33 | 34 | 35 | 36 | |
| 5 | 37 | 38 Sr | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 Cd | 49 In | 50 | 51 | 52 | 53 | 54 | |
| 6 | 55 | 56 Ba | * | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 Hg | 81 Tl | 82 | 83 | 84 | 85 | 86 |
| 7 | 87 | 88Ra | ** | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | ||||||
| *Lanthanoids | * | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 Yb | ||||
| *Actinoids | ** | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102No | ||||
Funding for this research is provided by the following agencies and programs: