Do you know exactly what quantum simulation is? In a broad sense, it is the simulation of time evolution in a quantum system, a situation that is becoming more and more complex with the development of universal gated quantum computers. Currently, there are three types of methods as follows. 1, Simulation of the time evolution of a quantum system on a classical computer. 2, Quantum simulation using artificial systems that are good at emulating other quantum systems, such as Rydberg particles. 3, Simulations using a universal gate-based quantum computer [1][2]. In the 1990s, various quantum simulators were built by various research groups, and various quantum systems were experimentally emulated. 3, is an area where the research population has recently exploded due to the development of quantum computers. Since blueqat can be easily implemented by creating a Hamiltonian and a wave function, one might think that it would be easy to enter this field, but this is not the case. Various systems have already been simulated by various groups. The systems that have already been studied are summarized in Fig. 1.<img src="https://assets.blueqat.com/public/uploads/us-east-2:62eba507-efdc-48b7-85a9-2f09d417847c/2021/06/22/blogQS1v.png"/>Fig. 1 Systems that have already been studied by quantum simulation. * indicates that several systems belonging to the system have already been quantum simulated. Not only these systems but also various other systems in each subarea have already been studied.   Not only these, but they have also been applied to research in high energy physics and astrophysics. Recently, some companies are trying to use it for drug discovery [10]. The only systems that seem to be left are some 3D non-local correlations, biophysical systems, and social engineering. I have an easy way to do quantum simulations if possible, as long as I know the Hamiltonian and the time evolution operator of the system. If you would like to contact me, I would be happy to help. [1]M. Geogescu and et. al., arxiv[quant-ph],1308.6253v3(2014)[2]C. Monroe and et. al., arxiv[quant-ph], 1912.07845(2019)[3]D. G. Angelakis and et. al., Phys. Rev. A, 76.031805(2007)[4]R. Moessner and A. P. Ramirez, Phys. Today, 59, 24-29(2006)[5]E. Manousakis, J. Low Temp. Phys., 126, 1501-1513(2002)[6]L. Dawei and et. al, Phys. Chem. Chem. Phys., 14, 9411-9420(2012) [7]D. A. Abamin, and et. al., Reviews of Modern Physics91(2), 021001(2019)[8]P. Jurcevic and et. al.,Phys. Rev. Lett. 119, 080501 (2017)[9]Zhao-Di Liu and et. al., Nature Communications volume 9, Article number: 3453 (2018) [10]https://qsimulate.com/a9052a02cc42cb464464c024dce400f7.html

Quantum simulation and its trends.

Hikaru Wakaura