![]() We overcome this challenge by creating a new However, doing so requires exponentially many measurements with a scaling worse Here, we perform higher-order quantum process tomography. Resource advantages, but the complete process matrix has only been described SWITCH has confirmed its ICO by measuring causal witnesses or demonstrating To date, no higher-order quantum operation has beenĬompletely experimentally characterized. Operation, in that it not only transforms quantum states, but also other The quantum SWITCH is also an example of a higher-order quantum ![]() Quantum protocols, and is exciting for its relation to issues in foundational Multiple parties act in a superposition of different orders in a manner ![]() Much of this research has focused on the quantum SWITCH, wherein Download a PDF of the paper titled Higher-order Process Matrix Tomography of a passively-stable Quantum SWITCH, by Michael Antesberger and 3 other authors Download PDF Abstract: The field of indefinite causal order (ICO) has seen a recent surge in
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