While the squeezing of a propagating field can, in principle, be made arbitrarily strong, the
cavity-field squeezing is subject to the well-known 3 dB limit, and thus has limited …

We show how to realize fast and high-fidelity quantum nondemolition qubit readout using
longitudinal qubit-oscillator interaction. This is accomplished by modulating the longitudinal …

We show how to use two-mode squeezed light to exponentially enhance cavity-based
dispersive qubit measurement. Our scheme enables true Heisenberg-limited scaling of the …

We introduce and analyze a dispersive qubit readout scheme where two-mode squeezing is
generated directly in the measurement cavities. The resulting suppression of noise enables …

While a propagating state of light can be generated with arbitrary squeezing by pumping a
parametric resonator, the intraresonator state is limited to 3 dB of squeezing. Here, we …

Microwave squeezing represents the ultimate sensitivity frontier for superconducting qubit
measurement. However, measurement enhancement has remained elusive, in part because …

The interaction strength of an oscillator to a qubit grows with the oscillator's vacuum field
fluctuations. The well-known degenerate parametric oscillator has revived interest in the …

Dispersive coupling based on the Rabi model with large detuning is widely used for qubit
quantum nondemolition (QND) readout in quantum computation. However, the …

It has been predicted and experimentally demonstrated that by injecting squeezed light into
an optomechanical device, it is possible to enhance the precision of a position …

We study the squeezing of output quadratures of an electro-magnetic field escaping from a
resonator coupled to a general quantum system with arbitrary interaction strengths. The …