We propose a method to steer the outcome of reactive atom-diatom scattering, using rotational wavepackets excited by strong non-resonant laser pulses. Full close-coupled quantum mechanical scattering calculations of the D+H2 and F+H2 reactions are presented, where the H2 molecule exists as a coherent superposition of rotational states. The nuclear spin selective control over the molecular bond ...

A new approach is presented to investigate the quantum coherence of Bose gas in a double-well potential by mapping the Bose system to the anisotropic spin system in the prescence of a magnetic field. In this picture, one can easily obtain the change from a coherent ground state to a Fock state in the replusive interaction case, and the change from a coherent state to a Schrödinger cat state in ...

We present a detailed analysis of spin squeezing of the one-axis twisting model with a many-body phase dephasing, which is induced by external field fluctuation in a two-mode Bose-Einstein condensates. Even in the presence of the dephasing, our analytical results show that the optimal initial state corresponds to a coherent spin state |θ0, φ0〉 with the polar angle θ0 = π/2. If the dephasing rat...

Long-lived coherent spin precession of (3)He-B at low temperatures around 0.2T(c) is a manifestation of Bose-Einstein condensation of spin-wave excitations or magnons in a magnetic trap which is formed by the order-parameter texture and can be manipulated experimentally. When the number of magnons increases, the orbital texture reorients under the influence of the spin-orbit interaction and the...

Controlling and swapping quantum information in a quantum coherent way between the microwave and optical regimes is essential for building long-range superconducting quantum networks but extremely challenging. We propose a hybrid quantum interface between the microwave and optical domains where the propagation of a single-photon pulse along a nanowaveguide is controlled in a coherent way by tun...

Solid-state quantum dots are promising candidates for efficient light-matter interfaces connecting internal spin degrees of freedom to the states emitted photons. However, selection rules prevent combination control and optical cyclicity in this platform. By utilizing a photonic crystal waveguide we here experimentally demonstrate up $\approx15$ through state engineering while achieving high fi...