  We propose a floating tunable coupler that does not rely on direct
qubit-qubit coupling capacitances to achieve the zero-coupling condition. We
show that the polarity of the qubit-coupler couplings can be engineered to
offset the otherwise constant qubit-qubit coupling and attain the zero-coupling
condition when the coupler frequency is above or below the qubit frequencies.
We experimentally demonstrate these two operating regimes of the tunable
coupler by implementing symmetric and asymmetric configurations of the
coupler's superconducting pads with respect to the qubits. Such a floating
tunable coupler provides flexibility in designing large-scale quantum
processors while reducing the always-on residual couplings.
