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Efficient population transfer via non-ergodic extended states in quantum spin glass
Kostyantyn Kechedzhi, Vadim Smelyanskiy, Jarrod R. McClean +6
We analyze a new computational role of coherent multi-qubit quantum tunneling that gives rise to bands of non-ergodic extended (NEE) quantum states each formed by a superposition o…
Quantum Supremacy Is Both Closer and Farther than It Appears
Igor L. Markov, Aneeqa Fatima, Sergei V. Isakov +1
As quantum computers improve in the number of qubits and fidelity, the question of when they surpass state-of-the-art classical computation for a well-defined computational task is…
Non-ergodic delocalized states for efficient population transfer within a narrow band of the energy landscape
Vadim N. Smelyanskiy, Konstyantyn Kechedzhi, Sergio Boixo +3
We analyze the role of coherent tunneling that gives rise to bands of delocalized quantum states providing a coherent pathway for population transfer (PT) between computational sta…
Simulation of low-depth quantum circuits as complex undirected graphical models
Sergio Boixo, Sergei V. Isakov, Vadim N. Smelyanskiy +1
Near term quantum computers with a high quantity (around 50) and quality (around 0.995 fidelity for two-qubit gates) of qubits will approximately sample from certain probability di…