Quantum Trajectory Entanglement in Seeded Boundary Time Crystals

• URL: http://arxiv.org/abs/2607.01335v1
• Date: Wed, 01 Jul 2026 18:00:08 GMT
• Title: Quantum Trajectory Entanglement in Seeded Boundary Time Crystals
• Abstract summary: entanglement spreads among different spin ensembles when a BTC attempts to seed its time-crystalline behavior onto otherwise static spin ensembles.<n>We analyse both the dynamical growth of entanglement in time and the steady-state properties of the system.<n>These findings establish dissipative seeding as a powerful mechanism for controlling quantum correlations in open many-body systems.
• Score: 46.94763753277221
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate the entanglement dynamics along quantum trajectories during the seeding of time-crystalline order in a boundary time crystal (BTC). Specifically, how entanglement spreads among different spin ensembles when a BTC attempts to seed its time-crystalline behavior onto otherwise static spin ensembles, through a collective dissipative channel. We analyse both the dynamical growth of entanglement in time and the steady-state properties of the system. Our results reveal two fundamentally distinct regimes. In the seeded BTC phase, the steady-state entanglement entropy between the ensembles grows with system size $N$, accompanied by macroscopic fluctuations along the trajectories. In contrast, in the non-seeded static phase, both the steady-state entanglement and its fluctuations decay exponentially with $N$. The model thus features a measurement-induced phase transition (MIPT) driven by the seeding mechanism. Furthermore, these findings establish dissipative seeding as a powerful mechanism for controlling quantum correlations in open many-body systems, with direct experimental relevance to this class of model without a postselection barrier.

Related papers

• Constructive interference at the edge of quantum ergodic dynamics [116.94795372054381]
  We characterize ergodic dynamics using the second-order out-of-time-order correlators, OTOC$(2)$.<n>In contrast to dynamics without time reversal, OTOC$(2)$ are observed to remain sensitive to the underlying dynamics at long time scales.
  arXiv  Detail & Related papers  (2025-06-11T21:29:23Z)
• Boundary Time Crystals Induced by Local Dissipation and Long-Range Interactions [7.677393990763026]
  Driven-dissipative many-body system supports nontrivial quantum phases absent in equilibrium.<n>This so-called boundary time crystal (BTC) is fragile in the presence of local dissipation.<n>We demonstrate a robust BTC that is intrinsically induced by local dissipation.
  arXiv  Detail & Related papers  (2025-03-26T17:49:59Z)
• Information scrambling and entanglement dynamics in Floquet Time Crystals [49.1574468325115]
  We study the dynamics of out-of-time-ordered correlators (OTOCs) and entanglement of entropy as measures of information propagation in disordered systems.
  arXiv  Detail & Related papers  (2024-11-20T17:18:42Z)
• Chaos in Time: A Dissipative Continuous Quasi Time Crystals [0.0]
  We introduce a Continuous Quasi Time Crystals (CQTC) Despite being characterized by the presence of non-decaying oscillations, this phase does not retain its long-range order. We investigate the connection between chaos and this quasi-crystalline phase using mean-field techniques.
  arXiv  Detail & Related papers  (2024-11-11T19:00:06Z)
• Self-Organized Time Crystal in Driven-Dissipative Quantum System [0.0]
  Continuous time crystals (CTCs) are characterized by sustained oscillations that break the time translation symmetry. We propose a new kind of CTC realized in a quantum contact model through self-organized bistability. Our results serve as a solid route towards self-protected CTCs in strongly interacting open systems.
  arXiv  Detail & Related papers  (2023-11-15T12:10:32Z)
• Indication of critical scaling in time during the relaxation of an open quantum system [34.82692226532414]
  Phase transitions correspond to the singular behavior of physical systems in response to continuous control parameters like temperature or external fields. Near continuous phase transitions, associated with the divergence of a correlation length, universal power-law scaling behavior with critical exponents independent of microscopic system details is found.
  arXiv  Detail & Related papers  (2022-08-10T05:59:14Z)
• Clean two-dimensional Floquet time-crystal [68.8204255655161]
  We consider the two-dimensional quantum Ising model, in absence of disorder, subject to periodic imperfect global spin flips. We show by a combination of exact diagonalization and tensor-network methods that the system can sustain a spontaneously broken discrete time-translation symmetry. We observe a non-perturbative change in the decay rate of the order parameter, which is related to the long-lived stability of the magnetic domains in 2D.
  arXiv  Detail & Related papers  (2022-05-10T13:04:43Z)
• Floquet time crystals in driven spin systems with all-to-all $p$-body interactions [0.0]
  We show the emergence of Floquet time crystal phases in the Floquet dynamics of periodically driven $p$-spin models. We develop a framework to predict robust subharmonic response in classical area-preserving maps. Our analysis reveals that the robustness of the time-crystal behavior is reduced as their period increases.
  arXiv  Detail & Related papers  (2022-01-26T00:57:40Z)
• Genuine Multipartite Correlations in a Boundary Time Crystal [56.967919268256786]
  We study genuine multipartite correlations (GMC's) in a boundary time crystal (BTC) We analyze both (i) the structure (orders) of GMC's among the subsystems, as well as (ii) their build-up dynamics for an initially uncorrelated state.
  arXiv  Detail & Related papers  (2021-12-21T20:25:02Z)
• Realizing discrete time crystal in an one-dimensional superconducting qubit chain [11.115884267868482]
  Floquet systems can support a discrete time-translation symmetry (TTS) broken phase, dubbed the discrete time crystal (DTC) Here we report the observation of the DTC in an one-dimensional superconducting qubit chain.
  arXiv  Detail & Related papers  (2021-08-02T14:44:30Z)
• Observation of Time-Crystalline Eigenstate Order on a Quantum Processor [80.17270167652622]
  Quantum-body systems display rich phase structure in their low-temperature equilibrium states. We experimentally observe an eigenstate-ordered DTC on superconducting qubits. Results establish a scalable approach to study non-equilibrium phases of matter on current quantum processors.
  arXiv  Detail & Related papers  (2021-07-28T18:00:03Z)

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.