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Lower Bounds for the Trotter Error
Alexander Hahn, Paul Hartung, Daniel Burgarth +2
In analog and digital simulations of practically relevant quantum systems, the target dynamics can only be implemented approximately. The Trotter product formula is the most common…
Bath Dynamical Decoupling with a Quantum Channel
Alexander Hahn, Kazuya Yuasa, Daniel Burgarth
Bang-bang dynamical decoupling protects an open quantum system from decoherence due to its interaction with the surrounding bath/environment. In its standard form, this is achieved…
Central Charge in Quantum Optics
Daniel Burgarth, Paolo Facchi, Hiromichi Nakazato +2
The product of two unitaries can normally be expressed as a single exponential through the famous Baker-Campbell-Hausdorff formula. We present here a counterexample in quantum opti…