Topic · Atomic and Molecular Physics, and Optics

Spectroscopy and Quantum Chemical Studies

Spectroscopy and Quantum Chemical Studies is a research topic within Atomic and Molecular Physics, and Optics. Science Explorer counts 97k research works in it since 1950. 9.8% of them reached the world's top 10% most cited for their field and year.

This cluster of papers explores the role of quantum coherence in photosynthetic energy transfer, as well as its effects on energy migration, ion interactions, hydrogen bonding, and vibrational dynamics in aqueous systems. The research also delves into the impact of ions on surface interfaces and the behavior of molecular systems under quantum coherence.

Quantum Coherence
Photosynthesis
Aqueous Systems
Energy Transfer
Vibrational Spectroscopy
Ion Effects
Hydrogen Bonding
Electronic Excitations
Surface Interfaces
Molecular Dynamics

Research works: 97k
In the world top 10%: 9.5k
Top-10% rate: 9.8%
Growth, 2018-21 → 2022-25: -13%
Largest producer: United States

Spectroscopy and Quantum Chemical Studies

Which countries lead Spectroscopy and Quantum Chemical Studies research?

By volume, the United States and China publish the most (1.6k and 1.2k works in 2022-now).

By volume, 2022-now

1 United States 1.6k works
2 China 1.2k works
3 Germany 655 works
4 Japan 471 works
5 India 425 works
6 France 388 works
7 United Kingdom 305 works
8 Italy 282 works
9 Russia 268 works
10 Spain 155 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

United States1,602 · 27.9%China1,200 · 20.9%Germany655 · 11.4%Japan471 · 8.2%6 others listed1,822 · 31.7%

Shares of the rows listed above, not of the whole node.

Which institutions lead Spectroscopy and Quantum Chemical Studies research?

By volume in 2022-now, Centre National de la Recherche Scientifique publishes the most Spectroscopy and Quantum Chemical Studies research, followed by Chinese Academy of Sciences and Russian Academy of Sciences.

By volume, 2022-now

1 Centre National de la Recherche ScientifiqueFrance 209 works
2 Chinese Academy of SciencesChina 135 works
3 Russian Academy of SciencesRussia 121 works
4 Max Planck SocietyGermany 94 works
5 Helmholtz Association of German Research CentresGermany 57 works
6 The University of TokyoJapan 45 works
7 Kyoto UniversityJapan 38 works
8 University of Science and Technology of ChinaChina 37 works
9 Czech Academy of SciencesCzechia 36 works
10 ETH ZurichSwitzerland 35 works

Who are the leading researchers in Spectroscopy and Quantum Chemical Studies?

The most-cited researchers publishing on Spectroscopy and Quantum Chemical Studies include Zhong Lin Wang, Michaël Grätzel and John P. Perdew.

1 Zhong Lin Wang United States 491k citations
2 Michaël Grätzel Switzerland 458k citations
3 John P. Perdew United States 436k citations
4 Georg Kresse Austria 431k citations
5 Andre K. Geim United Kingdom 315k citations
6 Kieron Burke United States 276k citations
7 Matthias Ernzerhof Canada 276k citations
8 George M. Whitesides United States 267k citations
9 Wei Huang China 267k citations
10 Ben Zhong Tang China 261k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in Spectroscopy and Quantum Chemical Studies?

The most cited paper in Spectroscopy and Quantum Chemical Studies is "Generalized Gradient Approximation Made Simple" (John P. Perdew, Kieron Burke, Matthias Ernzerhof, 1996), with 217,166 citations. Next come "Density-functional thermochemistry. III. The role of exact exchange" (104,174) and "Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density" (101,337).

Most cited papers
#	Paper	Released	Citations
1	Generalized Gradient Approximation Made Simple John P. Perdew, Kieron Burke, Matthias Ernzerhof · Physical Review Letters Open access	28 Oct 1996	217,166
2	Density-functional thermochemistry. III. The role of exact exchange Axel D. Becke · The Journal of Chemical Physics	Apr 1993	104,174
3	Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density Chengteh Lee, Weitao Yang, Robert G. Parr · Physical review. B, Condensed matter	15 Jan 1988	101,337
4	Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set Georg Kresse, Jürgen Furthmüller · Computational Materials Science	Jul 1996	76,620
5	Special points for Brillouin-zone integrations Hendrik J. Monkhorst, J.D. Pack · Physical review. B, Solid state	15 Jun 1976	71,952

All 100 most cited papers, with filters and sorting

Where is Spectroscopy and Quantum Chemical Studies research done?

The largest centres of Spectroscopy and Quantum Chemical Studies research in 2022-now are Beijing (China), Paris (France), Moscow (Russia) and Tokyo (Japan).

Largest cities, 2022-now

1 BeijingChina 266 works
2 ParisFrance 163 works
3 MoscowRussia 124 works
4 TokyoJapan 117 works
5 ShanghaiChina 84 works
6 BerlinGermany 82 works
7 HefeiChina 74 works
8 BerkeleyUnited States 73 works
9 LondonUnited Kingdom 71 works
10 HangzhouChina 56 works

See Spectroscopy and Quantum Chemical Studies on the map

Where is the best place to study Spectroscopy and Quantum Chemical Studies?

Among universities, judged by research, University of California, Berkeley, ETH Zurich and University of California San Diego score highest, combining citation excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

above the meannear itbelow it

One dot per university in the first ten of the table below, at the default weights. The upper left is the interesting corner: small places doing unusually strong work.

Citation excellenceshare of its work in the world top 10%, 2022-now and all time averaged

40%

Specialisationhow much of its work is in this field, counted up to 10× the world share

10%

Sizeits output in this field, on a log scale

30%

Growthoutput growth, counted from -20% to +20%

10%

Internationalshare of its work with a co-author abroad

10%

Each slider sets a weight; the share it gets of the score is beside it.

#	University	Score	Top 10%	Specialisation	Works	Growth
1	University of California, BerkeleyUnited States	76.9	15.1%	5.6×	34	+17.2%
2	ETH ZurichSwitzerland	75.7	21.7%	7.9×	35	-34.3%
3	University of California San DiegoUnited States	74.0	27.6%	4.5×	29	-14.7%
4	Princeton UniversityUnited States	71.6	19.8%	10.6×	31	+2.8%
5	California Institute of TechnologyUnited States	69.1	17.1%	8.4×	20	+11.7%
6	University of ChicagoUnited States	67.7	13.9%	5.5×	30	+16.0%
7	Scuola Normale SuperioreItaly	64.8	17.5%	47.5×	18	+35.4%
8	University of Science and Technology of ChinaChina	64.5	14.9%	4.8×	37	+30.2%
9	Freie Universität BerlinGermany	64.0	15.0%	10.2×	28	+12.7%
10	Stanford UniversityUnited States	63.1	15.1%	3.4×	33	-24.2%
11	University of CambridgeUnited Kingdom	62.9	22.6%	2.9×	23	-37.0%
12	Aarhus UniversityDenmark	62.4	11.1%	4.5×	25	+15.7%
13	Yale UniversityUnited States	61.7	17.6%	3.2×	22	-4.1%
14	Ruhr University BochumGermany	61.5	11.7%	9.8×	26	+5.4%
15	Columbia UniversityUnited States	61.2	23.0%	1.8×	12	+19.0%
16	University of Wisconsin–MadisonUnited States	60.9	15.1%	3.8×	22	+14.3%
17	École Polytechnique Fédérale de LausanneSwitzerland	60.6	16.1%	9.0×	24	-44.3%
18	Vrije Universiteit AmsterdamNetherlands	58.2	21.5%	4.8×	12	-10.6%
19	University College LondonUnited Kingdom	58.1	13.9%	2.2×	23	+3.7%
20	Massachusetts Institute of TechnologyUnited States	56.8	18.4%	4.3×	19	-36.8%
21	Technical University of DenmarkDenmark	56.8	10.0%	5.8×	19	+25.8%
22	University of Illinois Urbana-ChampaignUnited States	56.5	18.3%	3.7×	21	-31.2%
23	University of PisaItaly	54.7	16.0%	6.2×	19	-5.6%
24	University of Southern CaliforniaUnited States	54.1	12.4%	3.0×	16	+3.9%
25	Peking UniversityChina	53.7	13.8%	2.3×	30	-5.4%
26	University of OxfordUnited Kingdom	53.6	14.1%	2.6×	24	-11.2%
27	Université Paris Sciences et LettresFrance	53.5	15.0%	5.2×	13	+20.8%
28	University of LuxembourgLuxembourg	53.3	16.1%	5.5×	8	+28.8%
29	Beijing Normal UniversityChina	53.2	15.2%	4.2×	22	+60.6%
30	University of GroningenNetherlands	53.1	15.7%	2.6×	11	-2.1%
31	The University of TokyoJapan	52.4	7.6%	5.5×	45	-14.1%
32	Temple UniversityUnited States	52.2	27.3%	5.1×	11	-36.2%
33	University of MichiganUnited States	52.1	17.4%	2.5×	24	-37.6%
34	Uppsala UniversitySweden	52.0	18.2%	4.6×	16	-9.0%
35	Weizmann Institute of ScienceIsrael	51.9	13.9%	19.8×	18	-17.1%
36	University of WarwickUnited Kingdom	51.9	26.4%	2.9×	9	+24.2%
37	Technische Universität DarmstadtGermany	50.6	13.5%	7.5×	16	+14.6%
38	Tsinghua UniversityChina	50.5	14.3%	1.5×	23	+37.6%
39	University of MilanItaly	50.4	15.3%	3.9×	16	+11.2%
40	Sorbonne UniversitéFrance	50.1	11.0%	4.4×	20	+0.9%
41	University of California, Los AngelesUnited States	50.0	12.6%	2.3×	17	+57.8%
42	University of California, Santa BarbaraUnited States	49.5	28.8%	4.2×	8	-17.3%
43	Kyoto UniversityJapan	49.2	7.5%	7.7×	38	-23.4%
44	Technion – Israel Institute of TechnologyIsrael	49.2	10.9%	6.8×	16	+22.5%
45	University of ZurichSwitzerland	47.2	17.5%	2.9×	13	-35.2%
46	Imperial College LondonUnited Kingdom	46.9	13.5%	2.7×	18	-21.6%
47	The Ohio State UniversityUnited States	43.7	22.2%	1.6×	12	-51.2%
48	University of PennsylvaniaUnited States	43.6	21.3%	1.6×	11	-32.5%
49	Westlake UniversityChina	42.6	9.4%	12.7×	10	+286.3%
50	Tata Institute of Fundamental ResearchIndia	41.5	6.0%	19.7×	14	+37.1%
51	University of GenevaSwitzerland	41.3	18.0%	3.3×	9	-29.3%
52	Lomonosov Moscow State UniversityRussia	40.7	1.2%	6.2×	34	-31.6%
53	Indian Institute of Technology KanpurIndia	40.2	6.6%	10.6×	22	-8.3%
54	KU LeuvenBelgium	38.0	7.8%	1.9×	12	+73.4%
55	KTH Royal Institute of TechnologySweden	35.1	14.2%	3.5×	9	-27.5%
56	Nanyang Technological UniversitySingapore	31.3	7.6%	2.1×	11	-48.6%
57	Indian Institute of Science Education and Research ThiruvananthapuramIndia	30.9	4.0%	38.5×	11	+92.0%
58	Liaoning Normal UniversityChina	24.6	4.6%	14.7×	8	+412.1%
59	Saitama UniversityJapan	20.3	1.1%	17.2×	9	-0.0%

Universities only. The score blends citation excellence (40%), size (30%), specialisation (10%), growth (10%), international reach (10%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise.

Every institution in Spectroscopy and Quantum Chemical Studies, country by country

Is Spectroscopy and Quantum Chemical Studies research growing?

Output in 2022-2025 was 13% lower than in 2018-2021, peaking in 2009.

grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Spectroscopy and Quantum Chemical Studies as a percentage of every work published that year, 0.029% in 2024.

Fractional works of Spectroscopy and Quantum Chemical Studies over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.

Discussion

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Which countries lead Spectroscopy and Quantum Chemical Studies research?

By volume, 2022-now

How concentrated that is

Which institutions lead Spectroscopy and Quantum Chemical Studies research?

By volume, 2022-now

Who are the leading researchers in Spectroscopy and Quantum Chemical Studies?

What are the most cited papers in Spectroscopy and Quantum Chemical Studies?

Where is Spectroscopy and Quantum Chemical Studies research done?

Largest cities, 2022-now

Where is the best place to study Spectroscopy and Quantum Chemical Studies?

Is Spectroscopy and Quantum Chemical Studies research growing?

Its share of all research

How much of it reaches the world top 10%

Which topics inside it are moving

Related research

Discussion