Hastrup Jacob, Park Kimin, Brask Jonatan Bohr, Filip Radim, Andersen Ulrik Lund
Center for Macroscopic Quantum States (bigQ), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.
Department of Optics, Palacky Univeristy, 77146 Olomouc, Czech Republic.
Phys Rev Lett. 2022 Mar 18;128(11):110503. doi: 10.1103/PhysRevLett.128.110503.
We present a protocol for transferring arbitrary continuous-variable quantum states into a few discrete-variable qubits and back. The protocol is deterministic and utilizes only two-mode Rabi-type interactions that are readily available in trapped-ion and superconducting circuit platforms. The inevitable errors caused by transferring an infinite-dimensional state into a finite-dimensional register are suppressed exponentially with the number of qubits. Furthermore, the encoded states exhibit robustness against noise, such as dephasing and amplitude damping, acting on the qubits. Our protocol thus provides a powerful and flexible tool for discrete-continuous hybrid quantum systems.
