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quant-ph2026
A quantum oracle separation between QMA(2) and QMA
John Bostanci, Sabee Grewal, Jonas Haferkamp +4
We find a quantum oracle relative to which . As a consequence, we resolve the no-disentanglers conjecture of Watrous: for every , any $(ε,…
quant-ph2026
Depth-1 expanders on the unitary group and applications
Anurag Anshu, Shankar Balasubramanian, Jonas Haferkamp +2
We construct a constant-degree and constant-gap quantum expander on qubits where each unitary can be implemented by a depth- and 1D circuit of Pauli or CNOT gates. We provid…
quant-ph2026
Quantum repeater segment with free-space coupled co-trapped ions using telecom photon interference
Max Bergerhoff, Pascal Baumgart, Christian Haen +5
A quantum repeater segment is a basic building block of a quantum repeater, generating buffered entanglement of quantum memories to connect quantum repeater cells. It also enables…