Georgios A. Siviloglou

Southern Forum 2019, Shenzhen, 11-13 January 2019

Building a quantum assembler for magnetic atoms

• 2004 – 2010 PhD with Christodoulides at CREOL, USA • 2010 – 2014 Postdoc and research scientist at MIT with Ketterle • 2014 – 2018 Postdoc at the University of Amsterdam with Schreck• 2018 – Now Associate researcher/PI at SIQSE/SUSTech

Who I am

Short biography

Main research accomplishments

Self-bending Airy beams 𝒫𝒯-symmetry in optics

Hofstadter Hamiltonian A quantum gas experiment of strontium

I am looking for theory/experiment collaborations

Open positions for Engineers, Postdocs, IP, RAP

What I want to do

https://coldatoms-lab.com/

Building a quantum assembler for magnetic atoms

Hot atoms Cold atoms

Why do we need low temperatures?

Photo by T. W. Hänsch

Only 13 elements have been brought to quantum degeneracy

A. Frisch, PhD thesis (Ferlaino Group)

Quantum simulation with ultracold atoms

Vortex lattice

AFM

Strong magnetic

fields

Graphene physics

http://www.rle.mit.edu/cua_pub/ketterle_group/Nice_pics.htmC. J. Kennedy et al., Nature Physics 11, 859–864 (2015)A. Mazurenko et al., Nature 545, 462 (2017)https://www.quantumoptics.ethz.ch/gallery/albums/userpics/10002/honeycomb_atoms_bandstructure.jpg

Optical lattice clocks Programmable quantum simulator

Applications

Sr

Already here!

Project title my name date place and a(some) catchy picture(s)

A new strontium quantum gas experiment

Strontium quantum gas experiment with a microscope

Strontium quantum gas experiment with a microscope

• Gauge fields in topological lattices

What can we do with a quantum gas microscope

M. Mancini et al., Science 349, 6255, 1510-1513 (2015)

Artificial gauge fields with ultranarrow transitions

Excessive heating

Ultranarrow transitions

APS/C. Chin and E. MuellerS. Stellmer, PhD thesis (Grimm and Schreck Group)

Other opportunities

• Ultrasensitive magnetometers• Feshbach resonances• Direct trapping of metastable states• Ground-excited state molecules

• 2-electrons in the outer shell• 4 stable isotopes• A broad transition at 461 nm• A narrow transition at 689 nm• Two ultranarrow transitions (mHz!)

Strontium properties

https://www.sciencephoto.com/contributor/r3m/Photo by H. Pniok

The ultranarrow transition 1𝑆0 →3𝑃2 of 87𝑆𝑟

The frequency of the ultranarrow 1𝑆0 →3𝑃2 transition in 87𝑆𝑟 arXiv:1812.02115 [physics.atom-ph]

The frequency of the ultranarrow 1𝑆0 →3𝑃2 transition in 87𝑆𝑟 arXiv:1812.02115 [physics.atom-ph]

The ultranarrow transition 1𝑆0 →3𝑃2 of 87𝑆𝑟

Spectroscopy for the ultranarrow transition 1𝑆0 →3𝑃2

Iodine spectroscopy provides absolute reference

The frequency of the ultranarrow 1𝑆0 →3𝑃2 transition in 87𝑆𝑟 arXiv:1812.02115 [physics.atom-ph]

Microscope objective for imaging atomic strontium with 0.63 micrometer resolution (in preparation)

A microscope objective with submicron resolution

630 nm resolution

Less than 10 atoms

Fluorescence picture

Trapping and imaging strontium atoms with our microscope

https://coldatoms-lab.com/

Building a quantum assembler for magnetic atoms

A quantum gas experiment

• Large quantum gases (BECs, DFGs)

• Many-body and topological phenomena

• Quantum gas microscopy

• Quantum chemistry

A few-atom quantum assembler

• Assemble sample atom-by-atom

• Observe & manipulate single atoms

• Quantum optics with interactions

• Single-molecule creation

What I want to do

A quantum gas experiment

• Large quantum gases (BECs, DFGs)

• Many-body and topological phenomena

• Quantum gas microscopy

• Quantum chemistry

A few-atom quantum assembler

• Assemble sample atom-by-atom

• Observe & manipulate single atoms

• Quantum optics with interactions

• Single-molecule creation

What I want to do

Why magnetic atoms?

LENS GroupFerlaino GroupLev Group

Why magnetic atoms?

Dipolar interactions Long-range interactions

A. Frisch, PhD thesis (Ferlaino Group)S. Kotochigova, Rep. Prog. Phys. 77, 093901 (2014)

Why erbium? Strongly magnetic, many isotopes

K. Aikawa et al., Phys. Rev. Lett., 108, 210401 (2012)

Why erbium? Many Feschbach resonances

• It is highly magnetic μ = 7μΒ and thus strongly dipolar

Why erbium? High resolution, efficient cooling

H. Y. Ban et al., Optics Express 13, 8, 3185 (2005)A. Frisch, PhD thesis (Ferlaino Group)

Few-atom quantum assemblers

Programmable quantum simulatorThree-dimensional atomic array

D. Barredo et al., Nature 561, 79 (2018)

“For the optical tweezers and their application to biological systems."

Arthur Ashkin

© nature

Creating three-dimensional atom arrays for quantum computing

Machine learning for

atom loading

Ideas for collaboration

Quantum computation for magnetic

atoms

Bose-Fermi molecules of

erbium

𝒫𝒯- and

super-symmetry for atoms

Stable lasersfor

spin control

I am looking for theory/experiment collaborations

Open positions for Engineers, Postdocs, IP, RAP

https://coldatoms-lab.com/

Building a quantum assembler for magnetic atoms