Dephasing-Induced Distribution of Entanglement in Tripartite Quantum Systems

• URL: http://arxiv.org/abs/2408.09801v2
• Date: Fri, 06 Dec 2024 11:22:50 GMT
• Title: Dephasing-Induced Distribution of Entanglement in Tripartite Quantum Systems
• Authors: Sovik Roy, Md. Manirul Ali, Abhijit Mandal, Chandrashekar Radhakrishnan,
• Abstract summary: Reservoir memory offers a means to attenuate the decoherence dynamics impacting multipartite entanglement. We show that the robustness of a quantum system to decoherence depends on the distribution of entanglement.
• Score: 0.0
• License:
• Abstract: Preserving multipartite entanglement amidst decoherence poses a pivotal challenge in quantum information processing. However, assessing multipartite entanglement in mixed states amid decoherence presenting a formidable task. Employing reservoir memory offers a means to attenuate the decoherence dynamics impacting multipartite entanglement, thereby slowing its degradation. One of the important measures which can be implemented to quantify entanglement is the relative entropy of entanglement. Although this measure is not monogamous \cite{horodeckirev2009}, it can universally be applied to both pure and mixed states. Based on this fundamental novelty, in this work, therefore, we introduce a quantifier which will investigate how entanglement remain distributed among the qubits of multipartite states when these states are exposed to multipartite dephasing setting. For our study we use various pure and mixed tripartite states subjected to finite temperature in both Markovian and non-Markovian local/common bath. Here, we consider situations where the three qubits interact with a common reservoir as well as a local bosonic reservoir. We also show that the robustness of a quantum system to decoherence depends on the distribution of entanglement and its interaction with various configurations of the bath. When each qubit has its own local environment, the system exhibits different distribution dynamics compared to when all three qubits share a common environment with one exception regarding a mixed state.

Related papers

• Reservoir engineering to protect quantum coherence in tripartite systems under dephasing noise [0.0]
  Dephasing destroys the coherence of quantum states, leading to a loss of quantum information. In a Markov, memoryless environment, coherence in both pure and mixed states decays, whereas coherence is preserved in the presence of reservoir memory.
  arXiv  Detail & Related papers  (2024-12-19T17:28:32Z)
• Multipartite Embezzlement of Entanglement [44.99833362998488]
  Embezzlement of entanglement refers to the task of extracting entanglement from an entanglement resource via local operations and without communication. We show that finite-dimensional approximations of multipartite embezzling states form multipartite embezzling families. We discuss our results in the context of quantum field theory and quantum many-body physics.
  arXiv  Detail & Related papers  (2024-09-11T22:14:22Z)
• Local Purity Distillation in Quantum Systems: Exploring the Complementarity Between Purity and Entanglement [41.94295877935867]
  We introduce and develop the framework of Gibbs-preserving local operations and classical communication. We focus on systems with fully degenerate local Hamiltonians, where local cooling aligns with the extraction of local purity. Our findings open doors to various practical applications, including techniques for entanglement detection and estimation.
  arXiv  Detail & Related papers  (2023-11-20T14:58:31Z)
• Entanglement preservation in tripartite quantum systems under dephasing dynamics [0.0]
  We investigate the tripartite entanglement dynamics of pure and mixed states in the presence of a structured dephasing environment at finite temperature. We show that the robustness of the quantum system to decoherence is dependent on the distribution of entanglement. The sustainability of tripartite entanglement is shown to be enhanced significantly in presence of reservoir memory.
  arXiv  Detail & Related papers  (2023-11-09T06:19:08Z)
• Entanglement and localization in long-range quadratic Lindbladians [49.1574468325115]
  Signatures of localization have been observed in condensed matter and cold atomic systems. We propose a model of one-dimensional chain of non-interacting, spinless fermions coupled to a local ensemble of baths. We show that the steady state of the system undergoes a localization entanglement phase transition by tuning $p$ which remains stable in the presence of coherent hopping.
  arXiv  Detail & Related papers  (2023-03-13T12:45:25Z)
• Full counting statistics as probe of measurement-induced transitions in the quantum Ising chain [62.997667081978825]
  We show that local projective measurements induce a modification of the out-of-equilibrium probability distribution function of the local magnetization. In particular we describe how the probability distribution of the former shows different behaviour in the area-law and volume-law regimes.
  arXiv  Detail & Related papers  (2022-12-19T12:34:37Z)
• Upper Bounds on the Distillable Randomness of Bipartite Quantum States [15.208790082352351]
  distillable randomness of a bipartite quantum state is an information-theoretic quantity. We prove measures of classical correlations and prove a number of their properties. We then further bound these measures from above by some that are efficiently computable by means of semi-definite programming.
  arXiv  Detail & Related papers  (2022-12-18T12:06:25Z)
• Signatures of bath-induced quantum avalanches in a many-body--localized system [47.187609203210705]
  Quantum avalanches occur when the system is locally coupled to a small thermal inclusion that acts as a bath. We realize an interface between a many-body--localized system and a thermal inclusion of variable size, and study its dynamics.
  arXiv  Detail & Related papers  (2020-12-30T18:34:34Z)
• Disorder in dissipation-induced topological states: Evidence for a different type of localization transition [0.0]
  We study the effect of disorder on dissipation-introduced Chern topological states. We show that the critical exponent $nu$ describing the divergence of the localization length upon approaching the delocalized state is significantly different from equilibrium if disorder is introduced into the non-dissipative part of the dynamics.
  arXiv  Detail & Related papers  (2020-11-19T09:11:33Z)
• Complete complementarity relations in system-environment decoherent dynamics [0.0]
  We study how entanglement is redistributed and turnedinto general correlations between the degrees of freedom of the whole system. By considering the environment as part of a pure quantumsystem, the linear entropy is shown to be not just a measure of mixedness of a particular subsystem,but a correlation measure of the subsystem with rest of the world.
  arXiv  Detail & Related papers  (2020-09-21T11:41:40Z)
• Adiabatic quantum decoherence in many non-interacting subsystems induced by the coupling with a common boson bath [0.0]
  This work addresses quantum adiabatic decoherence of many-body spin systems coupled with a boson field in the framework of open quantum systems theory. We generalize the traditional spin-boson model by considering a system-environment interaction Hamiltonian that represents a partition of non-interacting subsystems.
  arXiv  Detail & Related papers  (2019-12-30T16:39:38Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.