Quantum 7, 1159 (2023). https://doi.org/10.22331/q-2023-11-03-1159 Deriving quantum mechanics from information-theoretic postulates is a recent research direction taken, in part, with the view of finding a beyond-quantum theory; once the postulates are clear, we can consider […]
Quantum 7, 1158 (2023). https://doi.org/10.22331/q-2023-11-03-1158 Accurate modeling of decoherence errors in quantum processors is crucial for analyzing and improving gate fidelities. To increase the accuracy beyond that of the Lindblad dynamical map, several generalizations have […]
The scale of quantum computers is growing quickly. In 2022, IBM took the top spot with its 433-qubit Osprey chip. Yesterday, Atom Computing announced they’ve one-upped IBM with a 1,180-qubit neutral atom quantum computer. The […]
Quantum 7, 1157 (2023). https://doi.org/10.22331/q-2023-10-25-1157 When two particles interact primarily through gravity and follow the laws of quantum mechanics, the generation of entanglement is considered a hallmark of the quantum nature of the gravitational interaction. […]
Quantum 7, 1156 (2023). https://doi.org/10.22331/q-2023-10-25-1156 In this paper, I present a way to compile the surface code into two-body parity measurements (“pair measurements”), where the pair measurements run along the edges of a Cairo pentagonal […]
Quantum 7, 1155 (2023). https://doi.org/10.22331/q-2023-10-25-1155 We establish an efficient approximation algorithm for the partition functions of a class of quantum spin systems at low temperature, which can be viewed as stable quantum perturbations of classical […]
Quantum 7, 1154 (2023). https://doi.org/10.22331/q-2023-10-24-1154 We reduce the extra qubits needed for two fault-tolerant quantum computing protocols: error correction, specifically syndrome bit measurement, and cat state preparation. For distance-three fault-tolerant syndrome extraction, we show an […]
Quantum 7, 1153 (2023). https://doi.org/10.22331/q-2023-10-24-1153 The promise of high-rate low-density parity check (LDPC) codes to substantially reduce the overhead of fault-tolerant quantum computation depends on constructing efficient, fault-tolerant implementations of logical gates on such codes. […]
Quantum 7, 1152 (2023). https://doi.org/10.22331/q-2023-10-24-1152 We introduce a semidefinite programming algorithm to find the minimal quantum Fisher information compatible with an arbitrary dataset of mean values. This certification task allows one to quantify the resource […]
Quantum 7, 1151 (2023). https://doi.org/10.22331/q-2023-10-24-1151 Spiking neural network is a kind of neuromorphic computing that is believed to improve the level of intelligence and provide advantages for quantum computing. In this work, we address this […]
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