Eichler C (2017)
Publication Type: Conference contribution, Conference Contribution
Publication year: 2017
City/Town: Munich, Germany
Event location: Munich, Germany
The high level of control achievable over quantized degrees of freedom has turned superconducting circuits into one of the prime physical architectures for quantum computing and simulation. Along with the continuing progress towards building a universal quantum computer, the availability of small-scale quantum devices has raised interest in hybrid quantum-classical algorithms, in which the power of quantum computation is combined with classical optimization [1]. In my talk, I will present an experimental realization of this idea based on the controlled generation of matrix product states (MPS) -- a class of states which has proven extremely powerful as a variational ansatz for numerical simulations. The correlation properties of these states are used to experimentally find the ground state of an interacting Bose gas confined in one dimension [2]. Our findings reveal interesting connections between the physics of cavity QED, solid state theory, and quantum information science. Extensions of the presented approach may be envisaged to also explore dynamical phenomena and discrete lattice models, offering interesting interdisciplinary perspectives. Technologically crucial for our experiments have been the development of quantum limited amplifiers [3] and the ability to measure photon statistics in the microwave frequency range [4]. Apart from being essential in our quest to build a practical quantum simulation platform, these technologies turn out very useful for exploring other systems such as spins and electrons in semiconductors [5,6]. [1] S. Barret et al., PRL 110, 090501 (2013), J.R. McClean et al., NJP 18, 023023, (2016) [2] C. Eichler et al., Phys. Rev. X 5, 041044 (2015) [3] C. Eichler et al. Phys. Rev. Lett. 106, 220503 (2011), C. Eichler et al. PRA 86, 032106 (2012) [4] C. Eichler et al., PRL 113, 110502 (2014), C. Eichler et al., PRL 107, 113601 (2011) [5] Y. Liu, et al., Science 347, 258 (2015), J. Stehlik et al., Phys. Rev. Applied 4, 014018 (2015) [6] Eichler et al., Phys. Rev. Lett. 118, 037701 (2017)
APA:
Eichler, C. (2017). Microwave Quantum Optics with Superconducting Circuits: From Quantum Variational Algorithms to Sensitive Electron Spin Resonance (ESR) Measurements. In Proceedings of the Resonator QED Conference. Munich, Germany: Munich, Germany.
MLA:
Eichler, Christopher. "Microwave Quantum Optics with Superconducting Circuits: From Quantum Variational Algorithms to Sensitive Electron Spin Resonance (ESR) Measurements." Proceedings of the Resonator QED Conference, Munich, Germany Munich, Germany, 2017.
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