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Nucleation in Supersaturated ^3He-^4He Liquid Mixtures - Quantum Effects in First Order Phase Transition -

Research Project

Project/Area Number 03452048
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 物性一般(含極低温・固体物性に対する理論)
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

SATOH Takeo  東北大学, 理学部, 助教授 (00004424)

Co-Investigator(Kenkyū-buntansha) TAKIGAWA Noboru  東北大学, 理学部, 助教授 (00125600)
TAKAGI Shin  東北大学, 理学部, 助教授 (90124594)
YAMAGUCHI Akira  東北大学, 理学部, 助教授 (60004470)
SAWADA Anju  東北大学, 理学部, 助教授 (90115577)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥6,600,000 (Direct Cost: ¥6,600,000)
Fiscal Year 1992: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1991: ¥5,700,000 (Direct Cost: ¥5,700,000)
KeywordsFirst Order Phase Transition / Decomposition / Quantum Tunneling / Macroscopic Quantum Phenomena / ^3He-^4He Liquid Mixtures / Ultralow Temperature / Superfluidity / Quantum Nucleation / ^3He-^4He混合液 / 量子揺らぎ / 巨視的量子効果 / ^3Heー^4He混合液
Research Abstract

A first order phase transition is the change of state from a metastable to a stable phase as the result of fluctuation in a homogeneous metastable medium, nuclei. For the nucleation, there is a potential barrier due to the creation of an interface. Usually, the fluctuation is the thermal fluctuation. However, in a temperature region extremely low compared with barrier height, the thermal fluctuation is no longer effective. If we still have any first order phase transition in such a situation, the nucleation must be due to the quantum tunneling. Quantum nucleation is a kind of macroscopic quantum phenomenon.
In order to investigate the possibility of the quantum nucleation, the decomposition of supersaturated ^3He-^4He liquid mixtures in the dilute phase has been studied in the temperature range from 160 mK down to 400 muK. The observed amount of critical supersaturation becomes almost independent of temperature below about 10 mK, while it increases above about 10 mK. The temperature- independent behavior suggests that we are in the quantum regime at least below about 10 mK. The behavior above about 10 mK conflicts with a simple expectation of the crossover consideration from the quantum to the classical regime. This fact suggests the importance of the effect of dissipation in macroscopic quantum phenomenon.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (39 results)

All Other

All Publications (39 results)

  • [Publications] T.Satoh,M.Morishita,M.Ogata,S.Ktatoh and K.Hatakeyama: "Critical Supersaturation of ^3He-^4He Liquid Mixtures" Proceedings of the 4th International Symposium on Foundations of Quantum Mechanics. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Satoh,M.Morishita,M.Ogata and S.Katoh: "Critical Supersaturation of ^3He-^4He Liquid Mixtures-Decay of Metastable States at Ultralow Tempertures-" Physical Review Letters. 69. 335-338 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Tsuda,Y.Mori and T.Satoh: "Superleak-tight Cold Valve Testable at Room Temperature" Review of Scientific Instrument. 62. 841 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Satoh and M.Okuyama: "Adiabatic Flow of He II.IV.Superfluid Frictional Force Fs" Physica B. 172. 420-427 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Satoh,M.Okuyama and K.Fukuda: "Adiabatic Flow of He II.III.Flow State of ^3He" Physica B. 172. 409-420 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Satoh,M.Morishita,M.Ogata,A.Sawada and T.Kuroda: "Unsaturation,Supersaturation and Demixing in ^3He-^4He Mixtures" Physica B. 169. 513-514 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] N.Takigawa,M.Kuratani and H.Satawa: "Heavy-ion Fusion Reaction with a Halo Nucleus-Large Enhancement of the tunneling Probability-" Proceedings of the 4th International Symposium on Foundation of Quantum Mechanics. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] A.B.Balantekin,J.R.Bennett,N.Takigawa and Y.Alhassid: "Two-time Influence Functional Approach to Multidimensional Quantum Tunneling" Proceedings of the 4th International Symposium on Foundation of Quantum Mechanics. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S.Takagi: "Tunneling Through a Squeezing Barrier" Proceedings of the 4th International Symposium of Foundation of Quantum Mechanics. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] N.Takigawa,Y.Alhassid and A.B.Balantekin: "Quantal and Thermal Zero Point Motion Formulae of Barrier Transmission Probability" Physical Review C. 45. 1850-1855 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] N.Takigawa,H.Sagawa and T.Shinozuka: "Fusion of a Halo Nucleus and Synthesis of Superheavy Elements" Nuclear Physics A. 538. 221 -228 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Satoh, M.Morishita, M.Ogata, S.Katoh and K.Hatakeyama: "Critical Supersaturation of ^3He-^4He Liquid Mixtures" Proceedings of the 4th Inter-national Symposium on Foundations of Quantum Mechanics. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] N.Takigawa, M.Kuratani and H.Sagawa: "Heavy-ion Fusion Reaction with a Halo Nucleus - Large Enhancement of the Tunneling Probability-" Proceedings of the 4th Inter-national Symposium on Foundations of Quantum Mechanics. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] A.B.Balantekin, J.R.Bennett, N.Takigawa and Y.Alhassid: "Two-time Influence Functional Approach to Multi-dimensional Quantum Tunneling" Proceedings of the 4th Inter-national Symposium on Foundations of Quantum Mechanics. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S.Takagi: "Tunneling Through a Squeezing Barrier" Proceedings of the 4th Inter-national Symposium on Foundations of Quantum Mechanics. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Satoh, M.Morishita, M.Ogata and S.Katoh: "Critical Supersaturation of ^3He-^4He Liquid Mixtures - Decay of Metastable States at Ultra-low Temperatures -" Physical Review Letters. 69. 335-338 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] N.Takigawa, Y.Alhassid and A.B.Balantekin: "Quantal and Thermal Zero Point Motion Formulae of Barrier Transmission Probability" Physical Review C. 45. 1850-1855 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] N.Takigawa, H.Sagawa and T.Shinozuka: "Fusion of a Halo Nucleus and Synthesis of Superheavy Elements" Nuclear Physics A. 538. 221c-228c (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Tsuda, Y.Mori and T.Satoh: "Superleak-tight Cold Valve Testable at Room Temperature" Review of Scientific Instrument. 62. 841 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Satoh and M.Okuyama: "Adiabatic Flow of He II. IV. Superfluid Frictional Force Fs" Physica B. 172. 420-427 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Satoh, M.Okuyama and K.Fukuda: "Adiabatic Flow of He II. III. Flow State of ^3He" Physica B. 172. 409-420 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Satoh, M.Morishita, M.Ogata, A.Sawada and T.Kuroda: "Unsaturation, Supersaturation and Demixing in ^3He-^4He Mixtures" Physica B. 169. 513-514 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Satoh: "Critical Supersaturation of ^3He-^4He Liquid Mixtures" Proceedings of the 4th International Symposium on Foundations of Quantum Mechanics. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Satoh: "Critical Supersaturation of ^3He-^4He Liquid Mixtures-Decay of Metastable States at Ultralow Temperratures" Physical Review Letters. 69. 335-338 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Tsuda: "Superleak-tight Cold Valve Testable at Room Temperature" Review of Scientific Instrment. 62. 841- (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Satoh: "Adiabatic Flow of He 2. 4. Superfluid Frictional Force Fs" Physica B. 172. 420-427 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Satoh: "Adiabatic Flow of He 2. 3. Flow State of ^3He" Physica B. 172. 409-420 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Satoh: "Unsaturation,Supersaturation and Demixing in ^3He-^4He Mixtures" Physica B. 169. 513-514 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] N.Takigawa: "Heavy-ion Fusion Reaction with a Halo Nucleus-Large Enhancement of the tunneling Probadility-" Proceedings of the 4th International Symposium on Foundation of Quantum Mechanics. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] A.B.Balantekin: "Two-time Influence Functional Approach to Multidimensional Quantum Tunneling" Proceedings of the 4th International Symposium on Foundation of Quantum Mechanics. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] S.Takagi: "Tunneling Through a Squeezing Barrier" Proceedings of the 4th International Symposium on Foundation of Quantum Mechanics. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] N.Takigawa: "Quantal and Thermal Zero Point Motion Formulae of Barrier Transmission Probability" Physical Review C. 45. 1850-1855 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] N.Takigawa: "Fusion of a Halo Nucleus and Synthesis of Superheavy Elements" Nuclear Physics A. 538. 221C-228C (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Takeo Satoh: "Adiabatic Flow of He II. IV Superfluid Frictional Force Fs" Physica B. 172. 420-427 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Takeo Satoh: "Adiabatic Flow of He II III.Flow state of ^3He" Physica B. 172. 409-419 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Takeo Satoh: "Unsaturation,Supersaturation and Demixing in ^3Heー^4He Mixtures" Physica B. 169. 513-514 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] W.Itoh: "New Silver Powders with Large Surface Area as Heart Exchanger Materials" Cryogenics. 31. 453-455 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Shin Takagi: "Quantum Dynamics and NonーInertial Frames of Reference.IV" Prog.Theor.Phys.86. 783-798 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Noboru Takigawa: "Interaction Potential and Fusion of a Halo Nucleus" Physics Lett.B. 265. 23-28 (1991)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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