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Theoreticians show which quantum systems are suitable for quantum simulations

Date:
October 27, 2020
Source:
Helmholtz-Zentrum Berlin für Materialien und Energie
Summary:
Researchers have shown a way to simulate the quantum physical properties of complex solid state systems. This is done with the help of complex solid state systems that can be studied experimentally.
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A joint research group led by Prof. Jens Eisert of Freie Universität Berlin and Helmholtz-Zentrum Berlin (HZB) has shown a way to simulate the quantum physical properties of complex solid state systems. This is done with the help of complex solid state systems that can be studied experimentally. The study was published in the journal Proceedings of the National Academy of Sciences (PNAS).

"The real goal is a robust quantum computer that generates stable results even when errors occur and corrects these errors," explains Jens Eisert, professor at Freie Universität Berlin and head of a joint research group at HZB. So far, the development of robust quantum computers is still a long way off, because quantum bits react extremely sensitively to the smallest fluctuations in environmental parameters.

But now a new approach could promise success: two postdocs from the group around Jens Eisert, Maria Laura Baez and Marek Gluza have taken up an idea of Richard Feynman, a brilliant US-American physicist of the post-war period. Feynman had proposed to use real systems of atoms with their quantum physical properties to simulate other quantum systems. These quantum systems can consist of atoms strung together like pearls in a string with special spin properties, but could also be ion traps, Rydberg atoms, superconducting Qbits or atoms in optical lattices. What they have in common is that they can be created and controlled in the laboratory. Their quantum physical properties could be used to predict the behaviour of other quantum systems. But which quantum systems would be good candidates? Is there a way to find out in advance?

Eisert's team has now investigated this question using a combination of mathematical and numerical methods. In fact, the group showed that the so-called dynamic structure factor of such systems is a possible tool to make statements about other quantum systems. This factor indirectly maps how spins or other quantum quantities behave over time, it is calculated by a Fourier transformation.

"This work builds a bridge between two worlds," explains Jens Eisert. "On the one hand, there is the Condensed Matter Community, which studies quantum systems and gains new insights from them -- and on the other hand there is Quantum Informatics -- which deals with quantum information. We believe that great progress will be possible if we bring the two worlds together," says the scientist.


Story Source:

Materials provided by Helmholtz-Zentrum Berlin für Materialien und Energie. Note: Content may be edited for style and length.


Journal Reference:

  1. Maria Laura Baez, Marcel Goihl, Jonas Haferkamp, Juani Bermejo-Vega, Marek Gluza, Jens Eisert. Dynamical structure factors of dynamical quantum simulators. Proceedings of the National Academy of Sciences, 2020; 117 (42): 26123 DOI: 10.1073/pnas.2006103117

Cite This Page:

Helmholtz-Zentrum Berlin für Materialien und Energie. "Theoreticians show which quantum systems are suitable for quantum simulations." ScienceDaily. ScienceDaily, 27 October 2020. <www.sciencedaily.com/releases/2020/10/201027105401.htm>.
Helmholtz-Zentrum Berlin für Materialien und Energie. (2020, October 27). Theoreticians show which quantum systems are suitable for quantum simulations. ScienceDaily. Retrieved March 28, 2024 from www.sciencedaily.com/releases/2020/10/201027105401.htm
Helmholtz-Zentrum Berlin für Materialien und Energie. "Theoreticians show which quantum systems are suitable for quantum simulations." ScienceDaily. www.sciencedaily.com/releases/2020/10/201027105401.htm (accessed March 28, 2024).

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