Talk given by

Dr. Guido Pagano

Joint Quantum Insitute and Joint Center for Quantum Information and Computer
Science, University of Maryland and National Institute of
Standards and Technology

College Park, MD

USA

Abstract:

Atomic systems, ranging from trapped ions to ultracold atoms, offer
unprecedented control over both internal and external degrees of freedom at the
single-particle level. They are considered among the foremost candidates for
realizing quantum simulation and computation platforms that can outperform
classical computers at specific tasks. In this talk I will review some aspects of
quantum simulation with ultracold neutral atoms in optical potentials and laser
cooled trapped ions. I will show how ultracold fermions in optical potentials offer
a complementary platform to condensed-matter experiments as they can be used
to explore paradigmatic models for strongly correlated electrons such as the
Hubbard model [1] and the Luttinger liquid [2]. I will then focus on the main topic,
namely linear arrays of trapped and laser cooled atomic ions, a versatile platform
for studying out-of-equilibrium many-body quantum systems thanks to high fidelity
coherent manipulations together with nearly perfect detection. These atomic
qubits can be used to run quantum algorithms [3] or engineer Hamiltonians to
emulate physical systems of interest, ranging from time-crystalline phases [4] to
dynamical phase transitions [5]. I will conclude showing some perspectives on
how to use neutral atoms in optical tweezers for quantum information purposes
[6] and how to scale up trapped-ion quantum simulators to larger system sizes [7].

References
[1] A. Mazurenko, et al., Nature 545, 462, (2017)
[2] G. Pagano, et al., Nature Physics 10, 198 (2014)
[3] S. Debnath et al. Nature 536, 63 (2016)
[4] J. Zhang, et al., Nature, 543, 217 (2017)
[5] J. Zhang, G. Pagano, et al., Nature 551, 601 (2017)
[6] G. Pagano et al., arXiv1808.02503 (2018)
[7] G. Pagano et al., Quantum Science and Techonolgy, in press (2018)