Circuit QED with qutrit: coupling three or more atoms via virtual photon exchange

Abstract

We present a model to describe a generic circuit QED system which consists of multiple artificial three-level atoms, namely qutrits, strongly coupled to a cavity mode. When the state transition of the atoms disobey the selection rules the process that does not conserve the number of excitations can happen determinatively. Therefore, we can realize coherent exchange interaction among three or more atoms mediated by the exchange of virtual photons. In addition, we generalize the one cavity mode mediated interactions to the multi-cavity situation, providing a method to entangle atoms located in different cavities. Using experimental feasible parameters, we investigate the dynamics of the model including three cyclic-transition three-level atoms, for which the two lowest-energy levels can be treated as qubits. Hence, we have found that two qubits can jointly exchange excitation with one qubit in a coherent and reversible way. In the whole process, the population in the third level of atoms is negligible and the cavity photon number is far smaller than 1. Our model provides a feasible scheme to couple multiple distant atoms together, which may find applications in quantum information processing.

10 pages, 6 figures

References in corpus (16)

• The Quantum Internet
• Quantum Computing
• QuTiP 2: A Python framework for the dynamics of open quantum systems
• Coupling Superconducting Qubits via a Cavity Bus
• Beyond the Jaynes-Cummings model: circuit QED in the ultrastrong coupling regime
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Observation of the Bloch-Siegert Shift in a Qubit-Oscillator System in the Ultrastrong Coupling Regime
• Quantum information processing with circuit quantum electrodynamics
• Ultrastrong coupling regime of cavity QED with phase-biased flux qubits
• Strong Coupling of a Quantum Oscillator to a Flux Qubit at its Symmetry Point
• Measurement of many-body chaos using a quantum clock
• Non-Poissonian Quantum Jumps of a Fluxonium Qubit due to Quasiparticle Excitations
• High-Fidelity Single-Shot Toffoli Gate via Quantum Control
• Photon mediated interaction between distant quantum dot circuits
• Using Superconducting Qubit Circuits to Engineer Exotic Lattice Systems
• Many-Body Interactions with Tunable-Coupling Transmon Qubits

Cited by in corpus (1)

• Simultaneous excitation of two noninteracting atoms with time-frequency correlated photon pairs in a superconducting circuit