Ergodicity breaking in rapidly rotating C60 fullerenes

• URL: http://arxiv.org/abs/2305.05324v1
• Date: Tue, 9 May 2023 10:19:35 GMT
• Title: Ergodicity breaking in rapidly rotating C60 fullerenes
• Authors: Lee R. Liu, Dina Rosenberg, P. Bryan Changala, Philip J.D. Crowley, David J. Nesbitt, Norman Y. Yao, Timur Tscherbul, Jun Ye
• Abstract summary: We report the observation of rotational ergodicity breaking in an unprecedentedly large and symmetric molecule, 12C60. This is facilitated by the first ever observation of icosahedral ro-vibrational fine structure in any physical system, first predicted for 12C60 in 1986. These peculiar dynamics result from the molecules' unique combination of symmetry, size, and rigidity, highlighting the potential of fullerenes to uncover emergent phenomena in mesoscopic quantum systems.
• Score: 0.6376404422444008
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Ergodicity, the central tenet of statistical mechanics, requires that an isolated system will explore all of its available phase space permitted by energetic and symmetry constraints. Mechanisms for violating ergodicity are of great interest for probing non-equilibrium matter and for protecting quantum coherence in complex systems. For decades, polyatomic molecules have served as an intriguing and challenging platform for probing ergodicity breaking in vibrational energy transport, particularly in the context of controlling chemical reactions. Here, we report the observation of rotational ergodicity breaking in an unprecedentedly large and symmetric molecule, 12C60. This is facilitated by the first ever observation of icosahedral ro-vibrational fine structure in any physical system, first predicted for 12C60 in 1986. The ergodicity breaking exhibits several surprising features: first, there are multiple transitions between ergodic and non-ergodic regimes as the total angular momentum is increased, and second, they occur well below the traditional vibrational ergodicity threshold. These peculiar dynamics result from the molecules' unique combination of symmetry, size, and rigidity, highlighting the potential of fullerenes to uncover emergent phenomena in mesoscopic quantum systems.

Related papers

• Quantum Scattering of Fullerene 12C60 with Rare Gas Atoms and its selection rules for rotational quenching [37.20818475839222]
  We present a perturbative quantum description of the 12C60 molecule interacting with a buffer gas of 40Ar atoms at temperatures of order 100 K.<n>The role of the icosahedral symmetry on the collisional dynamics is emphasized leading to unusual selection rules.
  arXiv  Detail & Related papers  (2026-03-02T16:35:01Z)
• Revisiting the Broken Symmetry Phase of Solid Hydrogen: A Neural Network Variational Monte Carlo Study [42.40832340604796]
  We show that even the broken symmetry phase observed around 130GPa requires revisiting due to its intricate coupling of electronic and nuclear degrees of freedom.<n>Our calculations reveal an unreported ground-state structure candidate for the broken symmetry phase with $Cmcm$ space group symmetry.<n>These results shed new light on the phase diagram of high-pressure hydrogen and call for further experimental verifications.
  arXiv  Detail & Related papers  (2025-12-19T15:36:27Z)
• Theory of itinerant collisional spin dynamics in nondegenerate molecular gases [0.0]
  We study the itinerant dynamics of ultracold but nondegenerate polar molecules with a spin-$1/2$ degree of freedom encoded into two of their electric field dressed rotational states.<n>We show that loss can be near completely suppressed in all collision channels via electric field confinement-induced collisional shielding.<n>This work establishes a bridge between the domains of ultracold molecular collisions and many-body spin physics.
  arXiv  Detail & Related papers  (2025-05-28T02:18:22Z)
• Realization of Two-dimensional Discrete Time Crystals with Anisotropic Heisenberg Coupling [0.42131793931438133]
  A discrete time crystal (DTC) is the paradigmatic example of a phase of matter that occurs exclusively in systems out of equilibrium. We demonstrate the existence of a DTC in a two-dimensional system governed by anisotropic Heisenberg interactions.
  arXiv  Detail & Related papers  (2025-01-29T22:51:09Z)
• 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. 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)
• Nonequilibrium relaxation exponentially delays the onset of quantum diffusion [0.0]
  We exploit a recent breakthrough that generalizes the concept of memory beyond its conventional temporal meaning to also encompass space. We employ the dynamics of small lattices over short times to predict the dynamics of thermodynamically large lattices over arbitrarily long timescales. We also compare transport in 1D and 2D systems to investigate the effect of dimension in polaron migration physics.
  arXiv  Detail & Related papers  (2024-11-26T01:09:23Z)
• Exploring Hilbert-Space Fragmentation on a Superconducting Processor [23.39066473461786]
  Isolated interacting quantum systems generally thermalize, yet there are several counterexamples for the breakdown of ergodicity. Recently, ergodicity breaking has been observed in systems subjected to linear potentials, termed Stark many-body localization. Here, we experimentally explore initial-state dependent dynamics using a ladder-type superconducting processor with up to 24 qubits.
  arXiv  Detail & Related papers  (2024-03-14T04:39:14Z)
• Robust Hamiltonian Engineering for Interacting Qudit Systems [50.591267188664666]
  We develop a formalism for the robust dynamical decoupling and Hamiltonian engineering of strongly interacting qudit systems. We experimentally demonstrate these techniques in a strongly-interacting, disordered ensemble of spin-1 nitrogen-vacancy centers.
  arXiv  Detail & Related papers  (2023-05-16T19:12:41Z)
• 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)
• Probing dynamics of a two-dimensional dipolar spin ensemble using single qubit sensor [62.997667081978825]
  We experimentally investigate individual spin dynamics in a two-dimensional ensemble of electron spins on the surface of a diamond crystal. We show that this anomalously slow relaxation rate is due to the presence of strong dynamical disorder. Our work paves the way towards microscopic study and control of quantum thermalization in strongly interacting disordered spin ensembles.
  arXiv  Detail & Related papers  (2022-07-21T18:00:17Z)
• 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)
• Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
  We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators. We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure. The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
  arXiv  Detail & Related papers  (2021-05-27T18:00:02Z)
• Designer Magnetism in High Entropy Oxides [41.74498230885008]
  Disorder can have a dominating influence on correlated and quantum materials. In magnetic systems, spin and exchange disorder can provide access to quantum criticality, frustration, and spin dynamics. We show that high entropy oxides present an unexplored route to designing quantum materials.
  arXiv  Detail & Related papers  (2021-04-12T15:21:48Z)
• Constraint-induced breaking and restoration of ergodicity in spin-1 PXP models [0.0]
  We show that miscellaneous type of ergodicity can be realized by adjusting the hardcore constraints. We analyze different forms of ergodicity and study their impact on the non-equilibrium dynamics of a Z2 initial state.
  arXiv  Detail & Related papers  (2021-04-01T18:10:43Z)
• Controlling many-body dynamics with driven quantum scars in Rydberg atom arrays [41.74498230885008]
  We experimentally investigate non-equilibrium dynamics following rapid quenches in a many-body system composed of 3 to 200 strongly interacting qubits in one and two spatial dimensions. We discover that scar revivals can be stabilized by periodic driving, which generates a robust subharmonic response akin to discrete time-crystalline order.
  arXiv  Detail & Related papers  (2020-12-22T19:00:02Z)
• Probing transport and slow relaxation in the mass-imbalanced Fermi-Hubbard model [0.0]
  Constraints in the dynamics of quantum many-body systems can dramatically alter transport properties and relaxation even in the absence of static disorder. We report on the observation of constrained dynamics arising from the distinct mobility of two species in the one-dimensional mass-imbalanced Fermi-Hubbard model. Our observations demonstrate the potential for quantum simulators to provide insights into unconventional relaxation dynamics arising from constraints.
  arXiv  Detail & Related papers  (2020-11-24T21:45:47Z)
• Dynamical generation of spin squeezing in ultra-cold dipolar molecules [2.6950517214073693]
  We study a bulk fermionic dipolar molecular gas in the quantum degenerate regime confined in a two-dimensional geometry. We derive a long-range interacting XXZ model describing the many-body spin dynamics of the molecules valid in the regime where motional degrees of freedom are frozen.
  arXiv  Detail & Related papers  (2020-11-16T19:00:08Z)
• Analog cosmological reheating in an ultracold Bose gas [58.720142291102135]
  We quantum-simulate the reheating-like dynamics of a generic cosmological single-field model in an ultracold Bose gas. Expanding spacetime as well as the background oscillating inflaton field are mimicked in the non-relativistic limit. The proposed experiment has the potential of exploring the evolution up to late times even beyond the weak coupling regime.
  arXiv  Detail & Related papers  (2020-08-05T18:00:26Z)

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.