Conditional displacement interaction in ultrastrong-coupling regime
Gangcheng Wang, Qingyong Wang, Yimin Wang, Jing-Ling, Kang Xue and, Chunfeng Wu
TL;DR
This paper explores how to realize and utilize a conditional displacement interaction in ultrastrongly coupled circuit QED systems, enabling faster quantum operations and state generation through parameter tuning.
Contribution
It derives a special transversal conditional displacement interaction in charge qubits coupled to LC resonators and demonstrates its application in quantum gates and superposed state generation.
Findings
Interaction operates at nanosecond timescale
Enhances quantum processing speed
Facilitates generation of superposed coherent states
Abstract
We investigate the realization of conditional displacement interaction in the transversal direction in ultrastrongly coupled circuit quantum electrodynamics by adjusting parameters of external magnetic fields. The special interaction is derived in the system of charge qubit(s) coupled to a LC resonator. We consolidate the implementation of quantum gates and the generation of superposed coherent states based on the transversal conditional displacement interaction numerically. The conditional displacement interaction in the ultrastrong coupling regime enhances quantum process to operate at the time scale of nanoseconds.
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Taxonomy
TopicsQuantum Information and Cryptography · Mechanical and Optical Resonators · Quantum and electron transport phenomena