Philip Walther

Practical and efficient experimental characterization of multiqubit stabilizer states

2015 · Physical Review A

Vast developments in quantum technology have enabled the preparation of quantum states with more than a dozen entangled qubits. The full characterization of such systems demands distinct constructions depending on their specific type and the …

Experimental Quantum Cryptography With Classical Users

2019 · arXiv (Cornell University)

The exploit of quantum systems allows for insights that promise to revolutionise information processing, although a main challenge for practical implementations is technological complexity. Due to its feasibility, quantum cryptography, which allows for perfectly secure …

Experimental beating the standard quantum limit under non-markovian dephasing environment

2022 · arXiv (Cornell University)

Entanglement enhanced quantum metrology has been well investigated for beating the standard quantum limit (SQL). However, the metrological advantage of entangled states becomes much more elusive in the presence of noise. Under strictly Markovian dephasing …