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Sharp entanglement ...
Sharp entanglement thresholds in the logarithmic negativity of disjoint blocks in the transverse-field Ising chain
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- Javanmard, Younes (författare)
- Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany.
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- Trapin, Daniele (författare)
- Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany.
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- Bera, Soumya (författare)
- Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
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- Bardarson, Jens H. (författare)
- KTH,Kondenserade materiens teori
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- Heyl, Markus (författare)
- Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany.
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Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India. (creator_code:org_t)
- 2018-08-23
- 2018
- Engelska.
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Ingår i: New Journal of Physics. - : Institute of Physics Publishing (IOPP). - 1367-2630. ; 20
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Entanglement has developed into an essential concept for the characterization of phases and phase transitions in ground states of quantum many-body systems. In this work we use the logarithmic negativity to study the spatial entanglement structure in the transverse-field Ising chain both in the ground state and at nonzero temperatures. Specifically, we investigate the entanglement between two disjoint blocks as a function of their separation, which can be viewed as the entanglement analog of a spatial correlation function. We find sharp entanglement thresholds at a critical distance beyond which the logarithmic negativity vanishes exactly and thus the two blocks become unentangled, which holds even in the presence of long-ranged quantum correlations, i.e., at the system's quantum critical point. Using time-evolving block decimation, we explore this feature as a function of temperature and size of the two blocks and present a simple model to describe our numerical observations.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- ground states and nonzero temperature states of transverse-field Ising model
- entanglement
- logarithmic negativity
- density matrices and partial transpose
- entanglement threshold and sudden death of entanglement
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- ref (ämneskategori)
- art (ämneskategori)
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