Speaker
Prof.
Rainer Blatt
Description
In this talk, the basic toolbox of the Innsbruck quantum information processor based on strings
of trapped Ca+ ions will be reviewed. For quantum computation, a scalable Shor algorithm was
realized [1] with a string of trapped Ca+
ions. Towards scaling the trapped ion quantum
computer, we encode one logical qubit in entangled states distributed over seven trapped-ion
qubits. We demonstrate the capability of the code to detect one bit flip, phase flip or a
combined error of both, regardless on which of the qubits they occur. Furthermore, we apply
combinations of the entire set of logical single-qubit Clifford gates on the encoded qubit to
explore its computational capabilities [4]. The quantum toolbox is further applied to carry out
both analog and digital quantum simulations. The basic simulation procedure and its application
will be discussed for a variety of spin Hamiltonians. Engineered quantum systems offer the
opportunity to study emergent phenomena in a precisely controlled and otherwise inaccessible
way. We present a spectroscopic technique to study artificial quantum matter and use it for
characterizing quasiparticles in a many-body system of trapped atomic ions [5]. Finally, we
report the experimental demonstration of a digital quantum simulation of a lattice gauge theory,
by realizing (1 + 1)-dimensional quantum electrodynamics (the Schwinger model) on a few-qubit
trapped-ion quantum computer [6].
[1] T. Monz et al., Science 351, 1068 (2016).
[2] P. Jurcevic et al., Nature 511, 202 (2014).
[3] T. Northup and R. Blatt, Nature Photonics 8, 356 (2014).
[4] D. Nigg et al., Science 345, 302 (2014).
[5] P. Jurcevic et al., Phys. Rev. Lett. 115, 100501 (2015).
[6] E. A. Martinez et al., Nature 534, 516 (2016).
Primary author
Prof.
Rainer Blatt