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Real-time dynamics ...
Real-time dynamics in diluted quantum networks
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- Aurell, Erik (författare)
- KTH,Beräkningsvetenskap och beräkningsteknik (CST),AlbaNova Univ Ctr, KTH Royal Inst Technol, SE-10691 Stockholm, Sweden.
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- Mulet, Roberto (författare)
- Univ Havana, Phys Fac, Dept Theoret Phys, Grp Complex Syst & Stat Phys, Havana, Cuba.
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- Tuziemski, Jan (författare)
- Stockholms universitet,Fysikum,Nordiska institutet för teoretisk fysik (Nordita),Gdańsk University of Technology, Poland
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(creator_code:org_t)
- AMER PHYSICAL SOC, 2022
- 2022
- Engelska.
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Ingår i: Physical Review A: covering atomic, molecular, and optical physics and quantum information. - : AMER PHYSICAL SOC. - 2469-9926 .- 2469-9934. ; 105:2
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We introduce an approach to characterize the dynamics of disordered quantum networks. Each quantum element (i.e., each node) of the network experiences the other nodes as an effective environment that can be self-consistently represented by a Feynman-Vernon influence functional. For networks having the topology of locally treelike graphs, these Feynman-Vernon (FV) functionals can be determined by a new version of the cavity or belief propagation (BP) method. Here, we find the fixed point solution of this version of BP for a network of uniform quantum harmonic oscillators. Then, we estimate the effects of the disorder in these networks within the replica symmetry ansatz. We show that over a large time interval, at small disorder, the real part of the FV functional induces decoherence and classicality while at sufficiently large disorder the Feynman-Vernon functional tends to zero and the coherence survives, signaling in a time setting, the onset of an Anderson's transition.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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