Class information for:
Level 1: TRAPPED IONS//TIME FREQUENCY//ION TRAP

Basic class information
Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
13 4 PHYSICS, PARTICLES & FIELDS//PHYSICS, NUCLEAR//OPTICS 1062565
141 3       PHYSICAL REVIEW A//OPTICS//PHYSICS, ATOMIC, MOLECULAR & CHEMICAL 66180
1640 2             TIME FREQUENCY//ATOMIC CLOCKS//FREQUENCY STANDARD 7221
2885 1                   TRAPPED IONS//TIME FREQUENCY//ION TRAP 2152

Terms with highest relevance score


rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 TRAPPED IONS authKW 179903 2% 24% 52
2 TIME FREQUENCY address 166620 3% 16% 73
3 ION TRAP authKW 156081 4% 13% 81
4 ULTRACOLD ATOMS address 147151 1% 36% 28
5 QUANTENOPT QUANTENINFORMAT address 131751 2% 17% 53
6 DANISH FDN QUANTUM OPT address 113950 1% 32% 24
7 ION STORAGE GRP address 89690 0% 88% 7
8 QUANTOP address 74832 1% 17% 30
9 QUANTENINFORMAT VERARBEITUNG address 72069 1% 31% 16
10 QUANTUM address 70842 1% 20% 24

Web of Science journal categories


chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Optics 25954 46% 0% 984
2 Physics, Atomic, Molecular & Chemical 19741 38% 0% 813
3 Physics, Multidisciplinary 11912 34% 0% 742
4 Physics, Applied 791 15% 0% 323
5 Instruments & Instrumentation 164 4% 0% 78
6 Physics, Mathematical 160 3% 0% 67
7 Physics, Fluids & Plasmas 34 2% 0% 33
8 Physics, Nuclear 14 2% 0% 33
9 Spectroscopy 6 1% 0% 25
10 Computer Science, Theory & Methods 3 1% 0% 23

Address terms


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 TIME FREQUENCY 166620 3% 16% 73
2 ULTRACOLD ATOMS 147151 1% 36% 28
3 QUANTENOPT QUANTENINFORMAT 131751 2% 17% 53
4 DANISH FDN QUANTUM OPT 113950 1% 32% 24
5 ION STORAGE GRP 89690 0% 88% 7
6 QUANTOP 74832 1% 17% 30
7 QUANTENINFORMAT VERARBEITUNG 72069 1% 31% 16
8 QUANTUM 70842 1% 20% 24
9 FOCUS 39169 1% 9% 30
10 QUEST EXPT QUANTUM METROL 39047 0% 67% 4

Journals


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 PHYSICAL REVIEW A 66946 26% 1% 556
2 APPLIED PHYSICS B-LASERS AND OPTICS 26286 5% 2% 118
3 NEW JOURNAL OF PHYSICS 19877 5% 1% 112
4 PHYSICAL REVIEW LETTERS 9937 12% 0% 258
5 QUANTUM INFORMATION & COMPUTATION 5772 1% 2% 19
6 APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY 5312 1% 2% 24
7 JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS 5198 4% 0% 77
8 ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS 3216 1% 1% 24
9 EUROPEAN PHYSICAL JOURNAL D 2995 2% 1% 34
10 NATURE PHYSICS 2138 1% 1% 16

Author Key Words


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 TRAPPED IONS 179903 2% 24% 52 Search TRAPPED+IONS Search TRAPPED+IONS
2 ION TRAP 156081 4% 13% 81 Search ION+TRAP Search ION+TRAP
3 RF TRAP 65893 0% 75% 6 Search RF+TRAP Search RF+TRAP
4 COLD CHEMISTRY 62472 0% 53% 8 Search COLD+CHEMISTRY Search COLD+CHEMISTRY
5 SURFACE ELECTRODE TRAP 58574 0% 100% 4 Search SURFACE+ELECTRODE+TRAP Search SURFACE+ELECTRODE+TRAP
6 RF ION TRAP 52712 0% 60% 6 Search RF+ION+TRAP Search RF+ION+TRAP
7 COLD MOLECULAR IONS 46858 0% 80% 4 Search COLD+MOLECULAR+IONS Search COLD+MOLECULAR+IONS
8 LASER COOLING 44338 2% 9% 35 Search LASER+COOLING Search LASER+COOLING
9 COLLISION COOLING 43931 0% 100% 3 Search COLLISION+COOLING Search COLLISION+COOLING
10 HYBRID TRAPS 43931 0% 100% 3 Search HYBRID+TRAPS Search HYBRID+TRAPS

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.

Classes with closest relation at Level 1


rank cluster_id2 link
1 6022 OPTICAL FREQUENCY STANDARD//ATOMIC CLOCKS//LNE SYRTE
2 38501 CAVITY ENHANCED DETECTION//ENS PSLCNRSCDF//FIBER TIP CAVITY
3 5223 NONLINEAR COHERENT STATES//TRAPPED IONS//COHERENT STATES
4 6851 QUADRUPOLE ION TRAP//QUADRUPOLE MASS FILTER//RECTILINEAR ION TRAP
5 1178 TELEPORTATION//CAVITY QED//REMOTE STATE PREPARATION
6 7350 ANTIHYDROGEN//NONNEUTRAL PLASMA//ULMER INITIAT UNIT
7 7678 NONACCELERATOR PARTICLE PHYS GRP//NON ACCELERATOR PARTICLE PHYS GRP//FRANCIUM
8 5358 QUANTUM CODES//QUANTUM ERROR CORRECTION//QUANTUM ERROR CORRECTING CODES
9 19371 NONLINEAR OPTIC CRYSTAL//PPKTP CRYSTAL//PPKTP
10 2806 ATOM LITHOGRAPHY//LASER COOLING//MAGNETO OPTICAL TRAP

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