摘要
Based on the rapid experimental developments of circuit QED,we propose a feasible scheme to simulate the spin-boson model with superconducting circuits,which can be used to detect quantum Kosterlitz-Thouless(KT) phase transition.We design the spinboson model by using a superconducting phase qubit coupled to a semi-infinite transmission line,which is regarded as a bosonic reservoir with a continuum spectrum.By tuning the bias current or the coupling capacitance,the quantum KT transition can be directly detected through tomography measurement on the states of the phase qubit.We also estimate the experimental parameters using the numerical renormalization group method.
Based on the rapid experimental developments of circuit QED, we propose a feasible scheme to simulate the spin-boson model with superconducting circuits, which can be used to detect quantum Kosterlitz-Thouless （KT） phase transition. We design the spin- boson model by using a superconducting phase qubit coupled to a semi-infinite transmission line, which is regarded as a bosonic reservoir with a continuum spectrum. By tuning the bias current or the coupling capacitance, the quantum KT transition can be directly detected through tomography measurement on the states of the phase qubit. We also estimate the experimental parameters using the numerical renormalization group method.
基金
supported by the National Natural Science Foundation of China (Grant Nos. 11004065,11104057 and 11125417)
the Natural Science Foundation of Guangdong Province (Grant No.10451063101006312)
the State Key Program for Basic Research of China(Grant No. 2011CB922104)
the GRF and CRF of the RGC of Hong Kong
