Experimental demonstration of work fluctuations along a shortcut to adiabaticity with a superconducting Xmon qubit. (2nd August 2018)

• Record Type: Journal Article
• Authors: Zhang, Zhenxing; Wang, Tenghui; Xiang, Liang; Jia, Zhilong; Duan, Peng; Cai, Weizhou; Zhan, Ze; Zong, Zhiwen; Wu, Jianlan; Sun, Luyan; Yin, Yi; Guo, Guoping
• Is Part Of: New journal of physics. Volume 20:Number 8(2018:Aug.)
• Publication Date: 2018-08-02
• Subjects: shortcut to adiabaticity -- quantum work fluctuations -- two-point measurement scheme -- superconducting qubit; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/aad4e7
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: In a 'shortcut to adiabaticity' (STA) protocol, the counter-diabatic Hamiltonian, which suppresses the non-adiabatic transition of a reference 'adiabatic' trajectory, induces a quantum uncertainty of the work cost in the framework of quantum thermodynamics. Following a theory derived recently (Funo et al 2017 Phys. Rev. Lett. 118 100602), we perform an experimental measurement of the STA work statistics in a high-quality superconducting Xmon qubit. Through the frozen-Hamiltonian and frozen-population techniques, we experimentally realize the two-point measurement of the work distribution for given initial eigenstates. Our experimental statistics verify (i) the conservation of the average STA work and (ii) the equality between the STA excess of work fluctuations and the quantum geometric tensor.