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Gaussian local unitary equivalence of -mode Gaussian states and Gaussian transformations by local operations with classical communication
Géza Giedke, Barbara Kraus
We derive necessary and sufficient conditions for arbitrary multi--mode (pure or mixed) Gaussian states to be equivalent under Gaussian local unitary operations. To do so, we intro…
Improved quantum metrology using quantum error-correction
W. Dür, M. Skotiniotis, F. Fröwis +1
We consider quantum metrology in noisy environments, where the effect of noise and decoherence limits the achievable gain in precision by quantum entanglement. We show that by usin…
Graph-state formalism for mutually unbiased bases
Christoph Spengler, Barbara Kraus
A pair of orthonormal bases is called mutually unbiased if all mutual overlaps between any element of one basis with an arbitrary element of the other basis coincide. In case the d…
Compressed Simulation of evolutions of the XY-model
Walter L. Boyajian, Valentin Murg, Barbara Kraus
We extend the notion of compressed quantum simulation to the XY-model. We derive a quantum circuit processing log(n) qubits which simulates the 1D XY-model describing n qubits. In…