Hierarchy of quantum correlations in qubit-qutrit axially symmetric states

• URL: http://arxiv.org/abs/2601.12292v1
• Date: Sun, 18 Jan 2026 07:38:40 GMT
• Title: Hierarchy of quantum correlations in qubit-qutrit axially symmetric states
• Authors: Venkat Abhignan, R. Muthuganesan,
• Abstract summary: We study the interplay between anisotropy parameters, magnetic fields, and temperature on the survival of quantum correlations in a hybrid qubit-qutrit system.<n>Results show that Bell nonlocality and entanglement (Negativity) are highly sensitive to temperature and anisotropy, exhibiting sudden death under thermal noise.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate quantum correlations in a hybrid qubit-qutrit system subject to both axial and planar single-ion anisotropies, dipolar spin-spin interactions, and Dzyaloshinskii-Moriya (DM) coupling. Using Negativity, Measurement-Induced Non-locality (MIN), Uncertainty-Induced Nonlocality (UIN), and Bell nonlocality (as quantified by the CHSH inequality) as measures, we analyze the interplay between anisotropy parameters, magnetic fields, and temperature on the survival of quantum correlations. Our results demonstrate that Bell nonlocality and entanglement (Negativity) are highly sensitive to temperature and anisotropy, exhibiting sudden death under thermal noise, whereas MIN and UIN are significantly more robust. In particular, these discord-like and information-theoretic measures provide the largest baseline and persist even in parameter regions where entanglement vanishes, highlighting their suitability as a quantumness witness in realistic conditions. Notably, our Bell nonlocality study is tailored to the asymmetric qubit-qutrit setting by exploiting a recently developed qubit-qudit CHSH maximization framework. However, Bell nonlocality is confirmed to be the most fragile, surviving only in narrow parameter windows at low temperature. A key finding of this work is that we observe the fragility hierarchy: Bell nonlocality < Negativity < UIN(MIN) in the qubit-qutrit setting. These results provide deeper insight into the relative robustness of distinct quantum resources in anisotropic qubit-qutrit models, suggesting that quantum discord-like measures, such as MIN and UIN, may serve as more practical resources than entanglement for quantum information tasks in thermally active spin systems.

Related papers

• Certifying optimal device-independent quantum randomness in quantum networks [29.495895069435235]
  We present a family of multipartite Bell inequalities that allows to certify optimal quantum randomness and self-test GHZ states.<n>Compared with the Mermin-type inequalities, this family of Bell inequality is more efficient in certifying quantum randomness when non-maximal Bell values achieved.
  arXiv  Detail & Related papers  (2026-01-26T14:40:01Z)
• Quantumness of hybrid systems under quantum noise [0.0]
  We investigate the quantum correlations in an axially symmetric hybrid qubit-qutrit system subjected to different noisy environments.<n>The effects of decoherence are then examined under two local noise mechanisms, namely dephasing and phase-flip channels.
  arXiv  Detail & Related papers  (2025-12-31T14:25:05Z)
• Quantum Mpemba effect in a four-site Bose-Hubbard model [0.8619139771027764]
  We investigate the quantum Mpemba effect (QME) in a one-dimensional Bose-Hubbard model across clean and disordered regimes.<n>Our results reveal that QME emerges prominently in the clean-interacting regime, where many-body correlations drive nonlinear relaxation pathways.
  arXiv  Detail & Related papers  (2025-09-08T17:48:42Z)
• Observation and Modulation of the Quantum Mpemba Effect on a Superconducting Quantum Processor [22.152087534616076]
  In non-equilibrium quantum many-body systems, the quantum Mpemba effect (QME) emerges as a counterintuitive phenomenon.<n>We report the observation and control of QME using a superconducting processor featuring a unique fully connected, tunable-coupling architecture.<n>Our study provides the first demonstration of flexible QME modulation on a superconducting platform with multiple controllable parameters.
  arXiv  Detail & Related papers  (2025-08-11T07:35:26Z)
• Topology-ferrimagnetism intertwining via weak interactions in Lieb lattices [12.089839767844488]
  We present an experimentally accessible platform for studying magnetic topological states in a spin-orbit-coupled Lieb lattice.<n>We observe the coexistence of topological characteristics, quantified by the Chern number and Bott index, with spontaneous symmetry-breaking orders.<n>Our findings pave the way for exploring the interplay between symmetry-broken states and topological order in strongly correlated systems.
  arXiv  Detail & Related papers  (2025-06-30T22:00:10Z)
• Non-Markovian Protection and Thermal Fragility of Quantum Resources in a Spin-1/2 Ising-Heisenberg Diamond Chain [0.0]
  This research investigates the dynamics of entanglement and uncertainty-induced nonlocality in a spin-1/2 Ising-Heisenberg diamond chain.<n>The interplay between intrinsic spin couplings, thermal effects, and memory-induced coherence backflow highlights the complex behavior of quantum resources under realistic noise conditions.
  arXiv  Detail & Related papers  (2025-06-15T05:59:18Z)
• Harnessing Chiral Spin States in Molecular Nanomagnets for Quantum Technologies [44.1973928137492]
  We show that chiral qubits naturally suppress always-on interactions that can not be switched off in weakly coupled qubits.<n>Our findings establish spin chirality engineering as a promising strategy for mitigating always-on interaction in entangling two chiral qubits in molecular quantum technologies.
  arXiv  Detail & Related papers  (2025-01-21T08:23:12Z)
• Enhanced Entanglement in the Measurement-Altered Quantum Ising Chain [43.80709028066351]
  Local quantum measurements do not simply disentangle degrees of freedom, but may actually strengthen the entanglement in the system.<n>This paper explores how a finite density of local measurement modifies a given state's entanglement structure.
  arXiv  Detail & Related papers  (2023-10-04T09:51:00Z)
• Quantum Transport in Open Spin Chains using Neural-Network Quantum States [11.137438870686026]
  We study the treatment of asymmetric open quantum systems with neural networks based on the restricted Boltzmann machine. In particular, we are interested in the non-equilibrium steady state current in the boundary-driven (anisotropic) Heisenberg spin chain.
  arXiv  Detail & Related papers  (2022-12-27T11:30:47Z)
• Noise-resilient Edge Modes on a Chain of Superconducting Qubits [103.93329374521808]
  Inherent symmetry of a quantum system may protect its otherwise fragile states. We implement the one-dimensional kicked Ising model which exhibits non-local Majorana edge modes (MEMs) with $mathbbZ$ parity symmetry. MEMs are found to be resilient against certain symmetry-breaking noise owing to a prethermalization mechanism.
  arXiv  Detail & Related papers  (2022-04-24T22:34:15Z)
• Many-body Hilbert space scarring on a superconducting processor [19.205729719781548]
  Quantum many-body scarring (QMBS) is a recently discovered form of weak ergodicity breaking in strongly-interacting quantum systems. Here, we experimentally realize a distinct kind of QMBS phenomena by approximately decoupling a part of the many-body Hilbert space in the computational basis. Our experimental findings broaden the realm of QMBS mechanisms and pave the way to exploiting correlations in QMBS states for applications in quantum information technology.
  arXiv  Detail & Related papers  (2022-01-10T16:33:38Z)
• Observation of Stark many-body localization without disorder [0.0]
  Many-body localization (MBL) can result in preservation of a non-thermal state. We realize Stark MBL in a trapped-ion quantum simulator. Results demonstrate the unexpected generality of MBL.
  arXiv  Detail & Related papers  (2021-02-14T21:33:23Z)
• Exact many-body scars and their stability in constrained quantum chains [55.41644538483948]
  Quantum scars are non-thermal eigenstates characterized by low entanglement entropy. We study the response of these exact quantum scars to perturbations by analysing the scaling of the fidelity susceptibility with system size.
  arXiv  Detail & Related papers  (2020-11-16T19:05:50Z)
• Localization of Rung Pairs in Hard-core Bose-Hubbard Ladder [13.46516066673]
  We study the rung-pair localization of the Bose-Hubbard ladder model without quenched disorder. In the hard-core limit, there exists a rung-pair localization both at the edges and in the bulk. Our results reveal another interesting type of disorder-free localization related to a zero-energy flat band.
  arXiv  Detail & Related papers  (2020-05-18T08:40:40Z)
• Robustness of Measurement-Induced Correlations Under Decoherence Effect [0.0]
  We study the dynamics of quantum correlation measures such as entanglement and measurement-induced nonlocality (MIN) It is observed that all the noises cause sudden death of entanglement for partially entangled states. We show the existence of separable quantum states with non-zero quantum correlations in terms of MIN.
  arXiv  Detail & Related papers  (2020-04-10T16:54:10Z)

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.