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Stabilizing spin coherence through environmental entanglement in strongly dissipative quantum systems

Publication ,  Journal Article
Bera, S; Florens, S; Baranger, HU; Roch, N; Nazir, A; Chin, AW
Published in: Physical Review B - Condensed Matter and Materials Physics
March 18, 2014

The key feature of a quantum spin coupled to a harmonic bath - a model dissipative quantum system - is competition between oscillator potential energy and spin tunneling rate. We show that these opposing tendencies cause environmental entanglement through superpositions of adiabatic and antiadiabatic oscillator states, which then stabilizes the spin coherence against strong dissipation. This insight motivates a fast-converging variational coherent-state expansion for the many-body ground state of the spin-boson model, which we substantiate via numerical quantum tomography. © 2014 American Physical Society.

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Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

March 18, 2014

Volume

89

Issue

12

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences
 

Citation

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Bera, S., Florens, S., Baranger, H. U., Roch, N., Nazir, A., & Chin, A. W. (2014). Stabilizing spin coherence through environmental entanglement in strongly dissipative quantum systems. Physical Review B - Condensed Matter and Materials Physics, 89(12). https://doi.org/10.1103/PhysRevB.89.121108
Bera, S., S. Florens, H. U. Baranger, N. Roch, A. Nazir, and A. W. Chin. “Stabilizing spin coherence through environmental entanglement in strongly dissipative quantum systems.” Physical Review B - Condensed Matter and Materials Physics 89, no. 12 (March 18, 2014). https://doi.org/10.1103/PhysRevB.89.121108.
Bera S, Florens S, Baranger HU, Roch N, Nazir A, Chin AW. Stabilizing spin coherence through environmental entanglement in strongly dissipative quantum systems. Physical Review B - Condensed Matter and Materials Physics. 2014 Mar 18;89(12).
Bera, S., et al. “Stabilizing spin coherence through environmental entanglement in strongly dissipative quantum systems.” Physical Review B - Condensed Matter and Materials Physics, vol. 89, no. 12, Mar. 2014. Scopus, doi:10.1103/PhysRevB.89.121108.
Bera S, Florens S, Baranger HU, Roch N, Nazir A, Chin AW. Stabilizing spin coherence through environmental entanglement in strongly dissipative quantum systems. Physical Review B - Condensed Matter and Materials Physics. 2014 Mar 18;89(12).

Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

March 18, 2014

Volume

89

Issue

12

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences