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55 papers · 2 filters
Proposal for the search for new spin interactions at the micrometer scale using diamond quantum sensors
P. -H. Chu, N. Ristoff, J. Smits +4
For decades, searches for exotic spin interactions have used increasingly-precise laboratory measurements to test various theoretical models of particle physics. However, most sear…
A Divide-and-Conquer Approach to Dicke State Preparation
Shamminuj Aktar, Andreas Bärtschi, Abdel-Hameed A. Badawy +1
We present a divide-and-conquer approach to deterministically prepare Dicke states (i.e., equal-weight superpositions of all -qubit states with Hamming Wei…
Warm-Started QAOA with Custom Mixers Provably Converges and Computationally Beats Goemans-Williamson's Max-Cut at Low Circuit Depths
Reuben Tate, Jai Moondra, Bryan Gard +2
We generalize the Quantum Approximate Optimization Algorithm (QAOA) of Farhi et al. (2014) to allow for arbitrary separable initial states with corresponding mixers such that the s…
Variational Quantum Algorithms for Semidefinite Programming
Dhrumil Patel, Patrick J. Coles, Mark M. Wilde
A semidefinite program (SDP) is a particular kind of convex optimization problem with applications in operations research, combinatorial optimization, quantum information science,…
Quantum memory at an eigenstate phase transition in a weakly chaotic model
M. R. Lambert, Shan-Wen Tsai, Shane P. Kelly
We study a fully connected quantum spin model resonantly coupled to a small environment of non-interacting spins, and investigate how initial state properties are remembered at lon…
Quantum computing Floquet energy spectra
Benedikt Fauseweh, Jian-Xin Zhu
Quantum systems can be dynamically controlled using time-periodic external fields, leading to the concept of Floquet engineering, with promising technological applications. Computi…