Inflationary Quasiparticle Creation and Thermalization Dynamics in Coupled Bose-Einstein Condensates. / Posazhennikova, Anna; Trujillo-Martinez, Mauricio; Kroha, Johann.

In: Physical Review Letters, Vol. 116, No. 22, 225304, 02.06.2016, p. 1-5.

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Inflationary Quasiparticle Creation and Thermalization Dynamics in Coupled Bose-Einstein Condensates. / Posazhennikova, Anna; Trujillo-Martinez, Mauricio; Kroha, Johann.

In: Physical Review Letters, Vol. 116, No. 22, 225304, 02.06.2016, p. 1-5.

Research output: Contribution to journalLetterpeer-review

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Posazhennikova, Anna ; Trujillo-Martinez, Mauricio ; Kroha, Johann. / Inflationary Quasiparticle Creation and Thermalization Dynamics in Coupled Bose-Einstein Condensates. In: Physical Review Letters. 2016 ; Vol. 116, No. 22. pp. 1-5.

BibTeX

@article{022d2e253cf64fe98383529e7b27205a,
title = "Inflationary Quasiparticle Creation and Thermalization Dynamics in Coupled Bose-Einstein Condensates",
abstract = "A Bose gas in a double-well potential, exhibiting a true Bose-Einstein condensate (BEC) amplitude and initially performing Josephson oscillations,is a prototype of an isolated, non-equilibrium many-body system.We investigate the quasiparticle creation and thermalization dynamics ofthis system by solving the time-dependent Keldysh-Bogoliubov equations.We find slow, exponential relaxation to a thermal state at an elevated temperature, controlled by the initial excitation energy of the oscillating BEC above its ground state. Interestingly, the relaxation is preceded by an effective decoupling of the quasiparticle subsystem from the BEC oscillations. The thermalization occurs because the BEC acts as a grand canonical reservoir for the quasiparticle system.",
author = "Anna Posazhennikova and Mauricio Trujillo-Martinez and Johann Kroha",
year = "2016",
month = jun,
day = "2",
doi = "10.1103/PhysRevLett.116.225304",
language = "English",
volume = "116",
pages = "1--5",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "22",

}

RIS

TY - JOUR

T1 - Inflationary Quasiparticle Creation and Thermalization Dynamics in Coupled Bose-Einstein Condensates

AU - Posazhennikova, Anna

AU - Trujillo-Martinez, Mauricio

AU - Kroha, Johann

PY - 2016/6/2

Y1 - 2016/6/2

N2 - A Bose gas in a double-well potential, exhibiting a true Bose-Einstein condensate (BEC) amplitude and initially performing Josephson oscillations,is a prototype of an isolated, non-equilibrium many-body system.We investigate the quasiparticle creation and thermalization dynamics ofthis system by solving the time-dependent Keldysh-Bogoliubov equations.We find slow, exponential relaxation to a thermal state at an elevated temperature, controlled by the initial excitation energy of the oscillating BEC above its ground state. Interestingly, the relaxation is preceded by an effective decoupling of the quasiparticle subsystem from the BEC oscillations. The thermalization occurs because the BEC acts as a grand canonical reservoir for the quasiparticle system.

AB - A Bose gas in a double-well potential, exhibiting a true Bose-Einstein condensate (BEC) amplitude and initially performing Josephson oscillations,is a prototype of an isolated, non-equilibrium many-body system.We investigate the quasiparticle creation and thermalization dynamics ofthis system by solving the time-dependent Keldysh-Bogoliubov equations.We find slow, exponential relaxation to a thermal state at an elevated temperature, controlled by the initial excitation energy of the oscillating BEC above its ground state. Interestingly, the relaxation is preceded by an effective decoupling of the quasiparticle subsystem from the BEC oscillations. The thermalization occurs because the BEC acts as a grand canonical reservoir for the quasiparticle system.

U2 - 10.1103/PhysRevLett.116.225304

DO - 10.1103/PhysRevLett.116.225304

M3 - Letter

VL - 116

SP - 1

EP - 5

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 22

M1 - 225304

ER -