Frontiers of quantum physics

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Classical Mechanics: A professor鈥搒tudent collaboration

Institute of Physics Publishing (2020)

Authors:

L. Scarpa, M. Campanelli, A. d鈥橝lfonso del Sordo, C. Tacconis, E. Caprioglio, S. M. Perez Garcia, M. T. Shabbir

Abstract:

Classical Mechanics: A professor-student collaboration is a textbook tailored for undergraduate physics students embarking on a first-year module in Newtonian mechanics. This book was written as a unique collaboration between Professor Mario Campanelli and students that attended his course in Classical Mechanics at University College London (UCL). Taking his lecture notes as a starting point, and reflecting on their own experiences studying the material, the students worked together with Prof. Campanelli to produce a comprehensive course text that covers a familiar topic from a new perspective.

Large-scale optothermal assembly of colloids mediated by a gold microplate

Journal of Physics: Condensed Matter 32 (32), 324002

Authors:

Vandana Sharma, Diptabrata Paul, Shailendra K Chaubey, Sunny Tiwari, GV Pavan Kumar

Abstract:

Aharonov-Bohm Phase is Locally Generated Like All Other Quantum Phases

Physical Review Letters American Physical Society (APS) 125:4 (2020) 040401

Authors:

Chiara Marletto, Vlatko Vedral

Quantum simulation with hybrid tensor networks

ArXiv 2007.00958 (2020)

Authors:

Xiao Yuan, Jinzhao Sun, Junyu Liu, Qi Zhao, You Zhou

Variational quantum simulation of general processes

Physical Review Letters American Physical Society 125:1-3 (2020) 010501

Authors:

Suguru Endo, Jinzhao Sun, Simon Benjamin, Xiao Yuan

Abstract:

Variational quantum algorithms have been proposed to solve static and dynamic problems of closed many-body quantum systems. Here we investigate variational quantum simulation of three general types of tasks鈥攇eneralized time evolution with a non-Hermitian Hamiltonian, linear algebra problems, and open quantum system dynamics. The algorithm for generalized time evolution provides a unified framework for variational quantum simulation. In particular, we show its application in solving linear systems of equations and matrix-vector multiplications by converting these algebraic problems into generalized time evolution. Meanwhile, assuming a tensor product structure of the matrices, we also propose another variational approach for these two tasks by combining variational real and imaginary time evolution. Finally, we introduce variational quantum simulation for open system dynamics. We variationally implement the stochastic Schr枚dinger equation, which consists of dissipative evolution and stochastic jump processes. We numerically test the algorithm with a 6-qubit 2D transverse field Ising model under dissipation.