The goal of the QS group is to design systems that can be used to advance fundamental research in quantum information science and to develop novel devices based on quantum technologies.

**Quantum information science (QIS):** Information can be encoded into selected binary states of
quantum systems. A quantum system is any particle or small structure whose behavior is governed by
quantum mechanics. Examples of such systems are electron orbitals in ions or atoms, polarization
in photons, and electrical current loops in superconductors. When a number of these quantum bits
(or qubits) are collected together, their quantum interactions allow them to be used to perform
certain algorithms far more efficiently than a classical computer. These algorithms include
factoring large numbers, searching unsorted databases, and simulating quantum phenomena in larger
systems than currently feasible. Quantum phenomena simulation, in particular, will aid research in
protein folding, phase transitions in material systems, and chemical dynamics.

**Building quantum information systems:** Under past programs, we have designed, fabricated,
and demonstrated a number of ion traps and systems to support scalability of quantum information
systems using trapped ions. Our current efforts focus on implementing small quantum algorithms in
these devices with the goal of better understanding the effects of noise on fidelity of the algorithms.

**Quantum Devices:** Trapped atoms and ions also make excellent inertial,
gravitational, or magnetic measurements, as well as precise frequency standards. We are leveraging
our expertise in QIS to develop atomic sensors, atomic inertial sensors and atomic clocks. Deployable
ion clocks can benefit from advanced measurement protocols under development at GTRI. These use the
transport capabilities enabled by our existing surface ion traps to simplify component requirements,
such as relaxing the required linewidth of an optical ion clock. We have also constructed a new lab
to test atom chip designs with novel features and component integration for making trapped-atom
interferometers.

Our effort to develop atomic magnetometers pairs our quantum device expertise with other groups at GTRI experienced in solving challenging signal processing problems. We are developing the hardware and signal processing techniques required to make use of the extremely high resolution of compact atomic magnetometers in real-world applications ranging from magnetic anomaly detection to research/clinical MEG.