Abstract
We present and analyze a toolbox for the controlled manipulation of ultracold polar molecules, consisting of detection of molecules, atom-molecule entanglement, and engineering of dissipative dynamics. Our setup is based on fast chemical reactions between molecules and atoms leading to a quantum Zeno-based collisional blockade in the system. We demonstrate that the experimental parameters for achieving high fidelities can be found using a straightforward numerical optimization. We exemplify our approach for a system composed of NaK molecules and Na atoms and we discuss the consequences of residual imperfections such as a finite strength of the quantum Zeno blockade.
Highlights
Ultracold polar molecules are very promising candidates for a wide range of applications such as quantum simulation [1] or searching for physics beyond the standard model [2]
We exemplify our approach for a system composed of NaK molecules and Na atoms and we discuss the consequences of residual imperfections such as a finite strength of the quantum Zeno blockade
In the limit where the reaction rate becomes much stronger than the coherent tunneling, the system gets frozen by the quantum Zeno effect, as resonant tunneling becomes unlikely because of the energy uncertainty induced by the dissipative reactions [18]
Summary
Ultracold polar molecules are very promising candidates for a wide range of applications such as quantum simulation [1] or searching for physics beyond the standard model [2]. We show that strong chemical reactions between molecules and atoms enable a dissipative interaction mechanism that in the quantum Zeno regime allows one to leverage the optical properties of atoms and achieve the same level of control for the molecules. In the limit where the reaction rate becomes much stronger than the coherent tunneling, the system gets frozen by the quantum Zeno effect, as resonant tunneling becomes unlikely because of the energy uncertainty induced by the dissipative reactions [18]. In this quantum Zeno regime, the dissipative atommolecule interaction implements a collisional blockade that allows for the efficient detection of molecules, overcoming a longstanding challenge. We will show how the entangling operation can be employed towards the controlled dissipation of rotational excitations of the molecule, which can be readily used within laser cooling protocols
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