# Dy Quantum Simulation

How do quantum systems thermalize when chaotic dynamics are introduced? How does quantum physics change in 1D? We explore these questions—and more—via the quantum simulation of many-body physics with quantum gases of dysprosium, the most magnetic element. Our group has pioneered the creation and study of Bose and Fermi-degenerate Dy gases. In our experiments, we exploit the long-range and anisotropic character of the dipole-dipole interaction among Dy atoms to create novel testbeds for quantum many-body physics, both within and away from equilibrium. For example, we recently made a quantum and magnetic version of the famous Newton's cradle toy. We used it to explore the breakdown of quantum integrability and the onset of thermalization in a strongly interacting quantum 1D system.

## Team Members

## News

We report the first measurements of the rapidity and momentum distributions of equilibrium dipolar... Read More

Published in Phys. Rev X. New work on thermalization in near-... Read More

Collisions of Dy BECs yield halos of dipolar scattered atoms. See movie made by Andrew... Read More

We created the first spin-orbit-coupled dipolar Fermi gas with Dy! Read about it in PRX ... Read More

APS Physics Viewpoint on quantum flucuations in imploding dipolar condensates.

Congratulations to Mingwu! Dr. Mingwu Lu defended his thesis June 2014 and is now a postdoc with Prof. Jeff Kimble at Caltech.

Lev and theory collaborators publish paper in PRA Rapid Communications on creating ... Read More

Two dysprosium papers published in PRA fall 2010. Papers detail Dy MOT physics and a... Read More

Dy MOT and magnetic trap collisions paper published in Phys. Rev. Lett. Research... Read More

## Publications

**Review article: Dipolar physics with atomic quantum gases**

L. Chomaz, I. Ferrier-Barbut, F. Ferlaino, B. Laburthe-Tolra, B. L. Lev, and T. Pfau

Reports on Progress in Physics **86**, 026401 (2023). pdf

arXiv:2201:02672

K.-Y. Li, Y. Zhang, K. Yang, K.-Y. Lin, S. Gopalakrishnan, M. Rigol, and B. L. Lev**Rapidity and momentum distributions of 1D dipolar quantum gases**

arXiv:2211.09118

W. Kao, K.-Y. Li, K.-Y. Lin, S. Gopalakrishnan, and B. L. Lev**Topological pumping of a 1D dipolar gas into strongly correlated prethermal states**

Science **371**, 296 (2021). pdf & SM*News coverage:*

Stanford News: *Stanford physicists find new state of matter in a one-dimensional quantum gas* pdf

APS DAMOP Highlight: *The Turn of the Screw*

arXiv:2002.10475 pdf

Y. Tang, W. Kao, K.-Y. Li, S. Seo, K. Mallayya, M. Rigol, S. Gopalakrishnan, and B. L. Lev**Thermalization near integrability in a dipolar quantum Newton's cradle**

Physical Review X **8**, 021030 (2018).

See Editors' Choice** Watching magnetic atoms thermalize** in Science

See News: Quantum Physics **A tiny version of this physics toy is revealing quantum secrets** in ScienceNews

See Synopsis **Pathway to Quantum Thermalization**** **in APS Physics

See Research Highlight **Towards thermalization** in Nature Physics

See Article **Toy inspires experiment on behavior of quantum systems** in Stanford News

arXiv:1707.07031 pdf

Y. Tang, W. Kao, K.-Y. Li, and B. L. Lev**Tuning the dipole-dipole interaction in a quantum gas with a rotating magnetic field**

Physical Review Letters **120**, 230401 (2018).

arXiv:1803.10867 (2018). pdf

W. Kao, Y. Tang, N. Burdick, and B. L. Lev**Anisotropic dependence of tune-out wavelength near Dy 741-nm transition**

Optics Express **25**, 3411 (2017). pdf

arXiv:1609.02111

N. Q. Burdick, A. G. Sykes, Y. Tang, and B. L. Lev**Anisotropic collisions of dipolar Bose-Einstein condensates in the universal regime**

New Journal of Physics **18**, 113004 (2016). pdf

See accompanying Perspective "Smashing Magnets" by Igor Ferrier-Barbut. pdf

arXiv:1607.06743

Y. Tang, A. G. Sykes, N. Q. Burdick, J. M. DiSciacca, D. S. Petrov, and B. L. Lev**Anisotropic expansion of a thermal dipolar Bose gas**

Physical Review Letters **117**, 155301 (2016). pdf

arXiv:1606.08856

L. D. Carr and B. L. Lev**Viewpoint: An Arrested Implosion**

APS Physics **9**, 55 (2016). pdf

N. Q. Burdick, Y. Tang, and B. L. Lev**A long-lived spin-orbit-coupled dipolar Fermi gas**

Physical Review X **6**, 031022 (2016). pdf

arXiv:1605.03211

Y. Tang, A. Sykes, N. Burdick, J. Bohn, and B. L. Lev*s*-wave scattering lengths of the strongly dipolar bosons ^{162}Dy and ^{164}Dy

Physical Review A **92**, 022703 (2015). pdf

arXiv:1506.03393

Erratum:** **Physical Review A **93**, 059905(E) (2016). pdf

N. Y. Yao, S. D. Bennett, C. R. Laumann, B. L. Lev, and A. V. Gorshkov**Bilayer fractional quantum Hall states with dipoles**

Physical Review A **92**, 033609 (2015). pdf

arXiv:1505.03099

Y. Tang, N. Burdick, K. Baumann, and B. L. Lev**Bose-Einstein condensation of ^{162}Dy and ^{160}Dy**

New Journal of Physics

**17**, 045006 (2015). pdf

Special Issue: Focus on New Frontiers of Cold Molecules Research

arXiv:1411.3069

N. Q. Burdick, K. Baumann, Y. Tang, M. Lu, and B. L. Lev**Fermionic suppression of dipolar relaxation**

Physical Review Letters **114**, 023201 (2015). pdf

arXiv:1407.3842

K. Baumann, N. Q. Burdick, M. Lu, and B. L. Lev**Observation of low-field Fano-Feshbach resonances in ultracold gases of dysprosium**

Physical Review A, Rapid Communications, **89,** 020701(R) (2014). pdf

arXiv:1312.6401

X. Cui, B. Lian, T.-L. Ho, B. L. Lev, and H. Zhai**Synthetic gauge field with highly magnetic lanthanide atoms**

Physical Review A, Rapid Communications **88**, 011601(R) (2013).

arXiv:1303.6004; pdf

M. Lu, N. Q. Burdick, and B. L. Lev**Quantum Degenerate Dipolar Fermi Gas**

Physical Review Letters **108**, 215301 (2012).

Selected as *Editors' Suggestion* and featured in Physics Viewpoint

arXiv:1202:4444; pdf

M. Hafezi, Z. Kim, S. Rolston, L. Orozco, B. L. Lev, and J. Taylor**An atomic interface between microwave and optical photons**

Physical Review A, Rapid communications **85**, 020302(R) (2012). pdf

M. Lu, N. Q. Burdick, S.-H. Youn, and B. L. Lev**Strongly Dipolar Bose-Einstein Condensate of Dysprosium**

Physical Review Letters **107**, 190401 (2011).

arXiv:1108.5993; pdf

M. Lu, S.-H. Youn, and B. L. Lev**Spectroscopy of a narrow-line laser cooling transition in atomic dysprosium**

Physical Review A **83**, 012510 (2011).

arXiv:1009.2962; pdf

S.-H. Youn, M. Lu, U. Ray, and B. L. Lev**Dysprosium magneto-optical traps**

Physical Review A **82**, 043425 (2010). pdf

S.-H. Youn, M. Lu, and B. L. Lev**Anisotropic sub-Doppler laser cooling in dysprosium magneto-optical traps**

Physical Review A **82**, 043403 (2010). pdf

M. Lu, S.-H. Youn, and B. L. Lev**Trapping ultracold dysprosium: A highly magnetic gas for dipolar physics**

Physical Review Letters **104**, 063001 (2010). pdf

Nature Research Highlights article “Dazzling dysprosium,” February 25th, 2010.

PhysicsWorld.com news report “Ultracold magnetic atoms bode well for quantum studies,” February 18th, 2010.

S. Kobtsev, B. Lev, J. Fortagh, and V. Baraulia**Powerful narrow-line source of blue light for laser cooling Yb/Er and Dysprosium atoms**

Proc. of SPIE **7578**, 75782F-1 (2010). pdf

B. Fregoso, K. Sun, E. Fradkin, and B. L. Lev**Biaxial nematic phases in ultracold dipolar Fermi gases**

New Journal of Physics **11**, 103003 (2009). pdf