Superfluidity and Phase Coherence in Very Degenerate Atomic Gases
Superfluidity and Phase Coherence in Very Degenerate Atomic Gases
批准号:
9614133
负责人:
Anthony Leggett
金额:
$28.8万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1996
资助国家:
美国
项目状态:
已结题
起止时间:
1996-11-15 至 2000-10-31
中文摘要
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英文摘要
9614133 Leggett Within the last year the phenomena of Bose-Einstein condensation (BEC) in dilute atomic gases has been realized in three different laboratories and many more are moving into this area. The systems in question lie in a regime of parameters (density, temperature, isolation _.) many orders of magnitude different from those which characterize the only previously known laboratory system believed to exhibit BEC, namely superfluid 4He. Consequently, it should be possible to use these systems to subject to experimental test a variety of ideas which are believed to apply to superfluid Helium but have never been tested there and in particular to explore the precise relation between BEC and the complex of phenomena which go under the name of "superfluidity". Theoretical work will be carried out, both in general and in the context of dilute atomic gases, to examine the superfluid density and the condition for the phenomena of zero rotation and of persistent currents, and to make predictions about a number of interesting experiments on the subject of "quantum phase coherence" and "phase memory" which are apparently feasible in these systems. This grant has been co-reviewed with the Theoretical Physics program in the Division of Physics and is being co-funded with them. %%% This grant supports the work of a senior, distinguished PI whose many thoughtful contributions to the general area of superfluidity and other condensed state phenomena (such as macroscopic quantum tunneling) are well known. This project, motivated by recent experiments, takes him back to the questions associated with relationship between Bose- Einstein condensation and superfluidity in dilute gases. This grant has been co-reviewed with the Theoretical Physics program in the Division of Physics and is being co-funded with them. ***
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Topics in Ultracold Fermi Gases and Topological Quantum Computing
-
批准号:0906921
-
项目类别:Continuing Grant
-
资助金额:$55.5万
-
财政年份:2009
-
负责人:Anthony Leggett
-
依托单位:
Theoretical Studies of Dilute Alkali Gases and Amorphous Materials
-
批准号:0350842
-
项目类别:Continuing Grant
-
资助金额:$60.8万
-
财政年份:2004
-
负责人:Anthony Leggett
-
依托单位:
Theoretical Studies of Superconductivity and Superfluidity
-
批准号:9986199
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项目类别:Continuing Grant
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资助金额:$45.0万
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财政年份:2000
-
负责人:Anthony Leggett
-
依托单位:
Violent Events in Superfluid Three-Helium and a Collective Model of Glasses
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批准号:9214236
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项目类别:Continuing Grant
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资助金额:$27.0万
-
财政年份:1992
-
负责人:Anthony Leggett
-
依托单位:
Violent Events in Superfluid 3Helium and a Collective Model of Glasses
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批准号:8822688
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项目类别:Continuing Grant
-
资助金额:$20.86万
-
财政年份:1989
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负责人:Anthony Leggett
-
依托单位:
Theoretical Studies of Macroscopic Quantum Tunnelling and the Helium Three A-B Phase Boundary (Materials Research)
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批准号:8315550
-
项目类别:Continuing Grant
-
资助金额:$37.32万
-
财政年份:1984
-
负责人:Anthony Leggett
-
依托单位:
国内基金
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