Decoherence-free quantum dynamics in circuit QED system
Ping Liao, Qin-Qin Wu, Jie-Qiao Liao, and Le-Man Kuang
TL;DR
This paper demonstrates how to achieve decoherence-free quantum dynamics in a circuit QED system by using an auxiliary TLR in a specific initial state, offering new control methods for quantum coherence.
Contribution
It introduces a method to realize decoherence-free dynamics in circuit QED systems using an auxiliary TLR in a particular initial state.
Findings
Decoherence-free dynamics can be achieved in circuit QED systems.
The auxiliary TLR's initial state is crucial for decoherence suppression.
The approach provides new insights into quantum control and decoherence management.
Abstract
We study decoherence in a circuit QED system consisting of a charge qubit and two superconducting transmission line resonators (TLRs). We show that in the dispersive regime of the circuit QED system one TLR can be used as an auxiliary subsystem to realize decoherence-free quantum dynamics of the bipartite target system consisting of the charge qubit and the other TLR conditioned on the auxiliary TLR initially being a proper number state. Our study gives new insight into control and manipulation of decoherence in quantum systems.
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Taxonomy
TopicsQuantum Information and Cryptography · Quantum and electron transport phenomena · Quantum Computing Algorithms and Architecture