3,993 research outputs found
Bose-glass to Superfluid transition in the three-dimensional Bose-Hubbard Model
We present a Monte Carlo study of the Bose-glass to superfluid transition in
the three-dimensional Bose-Hubbard model. Simulations are performed on the
classical (3 + 1) dimensional link-current representation using the geometrical
worm algorithm. Finite-size scaling analysis (on lattices as large as
16x16x16x512 sites) of the superfluid stiffness and the compressibility is
consistent with a value of the dynamical critical exponent z = 3, in agreement
with existing scaling and renormalization group arguments that z = d. We find
also a value of for the correlation length exponent,
satisfying the relation . However, a detailed study of the
correlation functions, C(r, tau), at the quantum critical point are not
consistent with this value of z. We speculate that this discrepancy could be
due to the fact that the correlation functions have not reached their true
asymptotic behavior because of the relatively small spatial extent of the
lattices used in the present study.Comment: 9 pages, 8 figures, submitted to PR
A List of Plants Collected in Lee County, Florida
The plants included in the following list were collected at several points in Lee County, Florida, in July and August, 1900. My headquarters were at Myers, on the Caloosahatchee River, at which place most of the numbers were collected. Collections were made also at Alva, about twenty-five miles up the river, at Punta Rassa and Sanibel, at the mouth of the river, and at Marco, an island a considerable distance down the coast. A few plants were collected at Everglade, at the southwest corner of the county. Of all the plants in proper condition and in sufficient abundance, ten sets were prepared. Full sets contain 500 forms, though the total numbers are 549. Several species were obtained which are not represented in the sets
Alien Registration- Hitchcock, William S. (Chapman, Aroostook County)
https://digitalmaine.com/alien_docs/26308/thumbnail.jp
Manual of the Grasses of the United States
Introduction 1
Uses of grasses 1
Distribution of grasses 5
Morphology of grasses 6
Classification of grasses 10
Nomenclature 12
Common names 14
Scope of the manual 14
Gramineae (Poaceae), the grass family 15
Descriptions of the subfamilies and keys to the tribes 16
Subfamily 1. Festucoideae 16
Subfamily 2. Panicoideae 17
Descriptions of the tribes and keys to the genera 17
Tribe 1. Bambuseae 17
Tribe 2. Festuceae 17
Tribe 3. Hordeae 20
Tribe 4. Aveneae 21
Tribe 5. Agrostideae 22
Tribe 6. Zovsieae 24
Tribe 7. Chlorideae 24
Tribe 8. Phalarideae. 25
Tribe 9. Oryzeae 25
Tribe 10. Zizanieae 26
Tribe 11. Melinideae 26
Tribe 12. Paniceae 26
Tribe 13. Andropogoneae 27
Tribe 14. Tripsaceae 29
Descriptions of genera and species 29
Tribe 1. Bambuseae 29
Tribe 2. Festuceae 31
Tribe 3. Hordeae 229
Tribe 4. Aveneae 275
Tribe 5. Agrostideae 306
Tribe 6. Zoysieae 462
Tribe 7. Chlorideae 469
TribeS. Phalarideae 526
Tribe 9. Oryzeae 535
Tribe 10. Zizanieae 540
Tribe 11. Melinideae 546
Tribe 12. Paniceae 549
Tribe 13. Andropogoneae 715
Tribe 14. Tripsaceae 764
Synonymy 772
Unidentified names 979
Persons for whom grasses have been named 982
Glossary 987
Additions and corrections 993
Index 99
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