Torque-induced dispersive readout in a weakly coupled hybrid system

Grigoryan, Vahram L.; Xia, Ke1

2020-08-25

10.1103/PhysRevB.102.064426

PHYSICAL REVIEW B   影响因子和分区

2469-9950

2469-9969

We propose a quantum state readout mechanism of a weakly coupled qubit in a dispersive regime. The hybrid system consists of a ferromagnetic insulator and a weakly coupled quantum system, e.g., single electron spin, in a microwave cavity. The enhancement of the measurement sensitivity is achieved by exerting torque on the ferromagnetic insulator magnetization, which compensates the damping of the system leading to an exceptional point. The proposed mechanism allows us to measure the qubit state either via the transmission of the cavity or the FMR signal of the magnetic material.

QUANTUM QUBIT

SCI ; EI

英语

通讯

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000562320700006

AMER PHYSICAL SOC

20204009259628

Magnetic moments ; Ferromagnetism ; Qubits ; Ferromagnetic materials ; Quantum optics

Magnetism: Basic Concepts and Phenomena:701.2 ; Magnetic Materials:708.4 ; Light, Optics and Optical Devices:741 ; Light/Optics:741.1 ; Nanotechnology:761 ; Mathematics:921 ; Quantum Theory; Quantum Mechanics:931.4

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China;
2.Peng Cheng Lab, Ctr Quantum Comp, Shenzhen 518005, Peoples R China

Grigoryan, Vahram L.,Xia, Ke. Torque-induced dispersive readout in a weakly coupled hybrid system[J]. PHYSICAL REVIEW B,2020,102(6).

Grigoryan, Vahram L.,&Xia, Ke.(2020).Torque-induced dispersive readout in a weakly coupled hybrid system.PHYSICAL REVIEW B,102(6).

Grigoryan, Vahram L.,et al."Torque-induced dispersive readout in a weakly coupled hybrid system".PHYSICAL REVIEW B 102.6(2020).