8 papers
How Quantum Agents Can Change Which Strategies Are More Complex
Spiros Kechrimparis, Nix Barnett, Mile Gu +1
Whether winning blackjack or navigating busy streets, achieving desired outcomes requires agents to execute adaptive strategies, strategies where actions depend contextually on pas…
Probabilistic Channel Distillation via Indefinite Causal Order
Spiros Kechrimparis, James Moran, Hyukjoon Kwon
The quantum switch has been widely studied as a prototypical example of indefinite causal order in quantum information processing. However, the potential advantages of utilising mo…
Near-optimal coherent state discrimination via continuously labelled non-Gaussian measurements
James Moran, Spiros Kechrimparis, Hyukjoon Kwon
Quantum state discrimination plays a central role in quantum information and communication. For the discrimination of optical quantum states, the two most widely adopted measuremen…
Enhancing Quantum State Discrimination with Indefinite Causal Order
Spiros Kechrimparis, James Moran, Athena Karsa +2
The standard quantum state discrimination problem can be understood as a communication scenario involving a sender and a receiver following these three steps: (i) the sender encode…
Causal Asymmetry of Classical and Quantum Autonomous Agents
Spiros Kechrimparis, Mile Gu, Hyukjoon Kwon
Why is it that a ticking clock typically becomes less accurate when subject to outside noise but rarely the reverse? Here, we formalize this phenomenon by introducing process causa…
Optimal measurement preserving qubit channels
Spiros Kechrimparis, Joonwoo Bae
We consider the problem of discriminating qubit states that are sent over a quantum channel and derive a necessary and sufficient condition for an optimal measurement to be preserv…