Dynamical phase transitions and temporal orthogonality in one-dimensional hard-core bosons: from the continuum to the lattice
We investigate the dynamics of the rate function and of local observables after a quench in models which exhibit phase transitions between a superfluid and an insulator in their ground states. Zeros of the return probability, corresponding to singularities of the rate functions, have been suggested...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2017-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/aa8aff |
| _version_ | 1827873274117226496 |
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| author | Thomás Fogarty Ayaka Usui Thomas Busch Alessandro Silva John Goold |
| author_facet | Thomás Fogarty Ayaka Usui Thomas Busch Alessandro Silva John Goold |
| author_sort | Thomás Fogarty |
| collection | DOAJ |
| description | We investigate the dynamics of the rate function and of local observables after a quench in models which exhibit phase transitions between a superfluid and an insulator in their ground states. Zeros of the return probability, corresponding to singularities of the rate functions, have been suggested to indicate the emergence of dynamical criticality and we address the question of whether such zeros can be tied to the dynamics of physically relevant observables and hence order parameters in the systems. For this we first numerically analyze the dynamics of a hard-core boson gas in a one-dimensional waveguide when a quenched lattice potential is commensurate with the particle density. Such a system can undergo a pinning transition to an insulating state and we find non-analytic behavior in the evolution of the rate function which is indicative of dynamical phase transitions. In addition, we perform simulations of the time dependence of the momentum distribution and compare the periodicity of this collapse and revival cycle to that of the non-analyticities in the rate function: the two are found to be closely related only for deep quenches. We then confirm this observation by analytic calculations on a closely related discrete model of hard-core bosons in the presence of a staggered potential and find expressions for the rate function for the quenches. By extraction of the zeros of the survival amplitude we uncover a non-equilibrium timescale for the emergence of non-analyticities and discuss its relationship with the dynamics of the experimentally relevant parity operator. |
| first_indexed | 2024-03-12T16:35:59Z |
| format | Article |
| id | doaj.art-e9af89f4ebeb4544bb4f653661e38462 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:35:59Z |
| publishDate | 2017-01-01 |
| publisher | IOP Publishing |
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| series | New Journal of Physics |
| spelling | doaj.art-e9af89f4ebeb4544bb4f653661e384622023-08-08T14:55:16ZengIOP PublishingNew Journal of Physics1367-26302017-01-01191111301810.1088/1367-2630/aa8affDynamical phase transitions and temporal orthogonality in one-dimensional hard-core bosons: from the continuum to the latticeThomás Fogarty0https://orcid.org/0000-0003-4940-5861Ayaka Usui1Thomas Busch2Alessandro Silva3John Goold4Quantum Systems Unit, Okinawa Institute of Science and Technology Graduate University , Onna, Okinawa 904-0495, JapanQuantum Systems Unit, Okinawa Institute of Science and Technology Graduate University , Onna, Okinawa 904-0495, JapanQuantum Systems Unit, Okinawa Institute of Science and Technology Graduate University , Onna, Okinawa 904-0495, JapanSISSA, Via Bonomea 265, I-34135 Trieste, ItalyThe Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, ItalyWe investigate the dynamics of the rate function and of local observables after a quench in models which exhibit phase transitions between a superfluid and an insulator in their ground states. Zeros of the return probability, corresponding to singularities of the rate functions, have been suggested to indicate the emergence of dynamical criticality and we address the question of whether such zeros can be tied to the dynamics of physically relevant observables and hence order parameters in the systems. For this we first numerically analyze the dynamics of a hard-core boson gas in a one-dimensional waveguide when a quenched lattice potential is commensurate with the particle density. Such a system can undergo a pinning transition to an insulating state and we find non-analytic behavior in the evolution of the rate function which is indicative of dynamical phase transitions. In addition, we perform simulations of the time dependence of the momentum distribution and compare the periodicity of this collapse and revival cycle to that of the non-analyticities in the rate function: the two are found to be closely related only for deep quenches. We then confirm this observation by analytic calculations on a closely related discrete model of hard-core bosons in the presence of a staggered potential and find expressions for the rate function for the quenches. By extraction of the zeros of the survival amplitude we uncover a non-equilibrium timescale for the emergence of non-analyticities and discuss its relationship with the dynamics of the experimentally relevant parity operator.https://doi.org/10.1088/1367-2630/aa8affdynamical phase transitionsTonks–Girardeau gasnon-equilibrium dynamics |
| spellingShingle | Thomás Fogarty Ayaka Usui Thomas Busch Alessandro Silva John Goold Dynamical phase transitions and temporal orthogonality in one-dimensional hard-core bosons: from the continuum to the lattice New Journal of Physics dynamical phase transitions Tonks–Girardeau gas non-equilibrium dynamics |
| title | Dynamical phase transitions and temporal orthogonality in one-dimensional hard-core bosons: from the continuum to the lattice |
| title_full | Dynamical phase transitions and temporal orthogonality in one-dimensional hard-core bosons: from the continuum to the lattice |
| title_fullStr | Dynamical phase transitions and temporal orthogonality in one-dimensional hard-core bosons: from the continuum to the lattice |
| title_full_unstemmed | Dynamical phase transitions and temporal orthogonality in one-dimensional hard-core bosons: from the continuum to the lattice |
| title_short | Dynamical phase transitions and temporal orthogonality in one-dimensional hard-core bosons: from the continuum to the lattice |
| title_sort | dynamical phase transitions and temporal orthogonality in one dimensional hard core bosons from the continuum to the lattice |
| topic | dynamical phase transitions Tonks–Girardeau gas non-equilibrium dynamics |
| url | https://doi.org/10.1088/1367-2630/aa8aff |
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