paper / mikhaillukin / Sep 7
Quantum sampling from Gibbs distributions can be achieved by adiabatically preparing states encoding the full probability distribution, with preparation time tied to phase transitions in parent Hamiltonians. Avoiding critical points along adiabatic paths yields quantum speedups over classical Markov chains for models like Ising chains, hard-sphere graphs, and unstructured search. Parent Hamiltonians for independent set sampling on certain graphs are realizable with Rydberg atom arrays.
quantum-samplingadiabatic-algorithmsquantum-phase-transitionscomputational-complexitygibbs-distributionsquantum-speeduprydberg-atoms
“Adiabatic preparation of quantum states encoding Gibbs distributions relates state preparation time to quantum phase transitions in parent Hamiltonians”
paper / mikhaillukin / Aug 24
Researchers propose and demonstrate a protocol using electro-optic modulators to entangle solid-state quantum emitters with optical transitions separated by many linewidths, addressing frequency mismatch challenges. A single photon heralds a parity measurement on paired spin qubits in silicon-vacancy centers within diamond nanophotonic cavities. The method, tested with a 7.4 GHz separation, supports individual addressing and parallel control for scaling quantum networks.
quantum-entanglementsolid-state-emitterssilicon-vacancy-centersquantum-networksspin-qubitselectro-optic-modulatorsdiamond-nanophotonics
“Solid-state quantum emitters have distinct transition frequencies due to local environment differences, complicating optical entanglement.”