Selected Publications

Fumika Suzuki, and W. H. Zurek,
Topological defect formation in a phase transition with tunable order,
Phys. Rev. Lett. 132, 241601 (2024)
APS Physics Magazine
LANL news

Poster presentation

The Kibble-Zurek mechanism (KZM) describes the non-equilibrium dynamics and topological defect formation in systems undergoing second-order phase transitions. KZM has found applications in fields such as cosmology and condensed matter physics. While KZM has been investigated numerically and experimentally in various contexts, its applicability to weakly first-order or tunable phase transitions is an open question. We explored quench-induced formation of topological defects in tunable-order phase transitions and proposed that their density can be predicted by combining KZM with nucleation theory.


Fumika Suzuki, S. A. Shah, Diego A. R. Dalvit, Markus Arndt,
Requirements for probing chiral Casimir-Polder forces in a molecular Talbot-Lau interferometer,
Phys. Rev. Research 6, 023145 (2024)

Chirality-dependent dispersion forces, such as the van der Waals (vdW) forces, the Casimir-Polder (CP) forces and the Casimir effects have been theoretically predicted with a growing attention towards their experimental detection. Talbot-Lau setup consisting of nanomechanical gratings is particularly sensitive to CP forces in the non-retarded regime where chiral effects can be comparable in magnitude to their electric and magnetic counterparts. We show requirements for probing chiral CP effects in matter-wave interferometry in the transmission signal and the interference fringe visibility.

Fumika Suzuki, and W. G. Unruh,
Numerical quantum clock simulations for measuring tunneling times,
Phys. Rev. A 107, 042216 (2023)

We simulated a method for measuring quantum tunnelling time using the adiabatic theorem. This method causes backaction in a different way from the conventional method using the Larmor clock. By comparing the outcomes of these two types of measurements, we investigated why the quantum tunnelling time may appear shorter for higher barriers.




Fumika Suzuki, Mikhail Lemeshko, Wojciech H. Zurek, Roman V. Krems,
Anderson Localization of Composite Particles,
Phys. Rev. Lett. 127, 160602 (2021)

Anderson localization (AL) is known as a consequence of interference between multiple scattering paths. However, decoherence destroys interference phenomena. In this paper, we studied how AL of composite particles can be suppressed by decoherence due to their own internal states. We showed that decoherence due to the internal states can reduce localization or even may induce extended states.


Publications, Preprints with Students

Bhavay Tyagi, Fumika Suzuki, Vladimir A. Chernyak, Nikolai A. Sinitsyn,
Asymmetry Amplification by a Nonadiabatic Passage through a Critical Point,
arXiv:2408.15897 (2024)

Vijay Ganesh Sadhasivam, Fumika Suzuki, Bin Yan, Nikolai A. Sinitsyn,
Parametric tuning of dynamical phase transitions in ultracold reactions,
arXiv:2403.09291 (2024)

Nikolai A. Sinitsyn, Vijay Ganesh Sadhasivam, Fumika Suzuki,
Nonadiabatic transitions during a passage near a critical point,
J. Chem. Phys. 160, 074104 (2024)

The study of nonadiabatic excitations that emerge during a slow passage through a quantum critical point is crucial for quantum annealing computers, and also has applications in cosmology, quantum metrology and control. We derived the exact number of excitations analytically within a regime where a system pass in the vicinity of the critical point without crossing it.

My research articles: arXiv