European Conference on Trapped Ions (ECTI)

To apply today's quantum hardware to challenging problems, we need to efficiently use native interactions while minimizing the effects of noise. While operations on trapped ion qubits can be first-order resilient to noisy electric fields, deep computations with long ion chains suffer from high axial temperatures. To counter this, we employ sympathetic cooling in ${}^{171}$Yb${}^{+}$-${}^{172}$Yb${}^{+}$ chains. To speed up digital computations and simulations, we developed a new class of quantum gates based on state-dependent squeezing. To speed up analog simulations, we leverage individual addressing of spins. We prepare near-ground states of the long-range 1D XY model, which break the U(1) symmetry of the underlying Hamiltonian, resulting in long-range off-diagonal order.