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8 papers · 2 filters
Incoherent Approximation of Leakage in Quantum Error Correction
Jeffrey Marshall, Dvir Kafri
Quantum error correcting codes typically do not account for quantum state transitions - leakage - out of the computational subspace. Since these errors can last for multiple detect…
Challenges and Opportunities in Quantum Optimization
Amira Abbas, Andris Ambainis, Brandon Augustino +43
Recent advances in quantum computers are demonstrating the ability to solve problems at a scale beyond brute force classical simulation. As such, a widespread interest in quantum a…
Simulation of quantum optics by coherent state decomposition
Jeffrey Marshall, Namit Anand
We introduce a framework for simulating quantum optics by decomposing the system into a finite rank (number of terms) superposition of coherent states. This allows us to define a r…
Scrambling and operator entanglement in local non-Hermitian quantum systems
Brian Barch, Namit Anand, Jeffrey Marshall +2
The breakdown of Lieb-Robinson bounds in local, non-Hermitian quantum systems opens up the possibility for a rich landscape of quantum many-body phenomenology. We elucidate this by…
Nonergodic measurements of qubit frequency noise
Filip Wudarski, Yaxing Zhang, M. I. Dykman
Slow fluctuations of a qubit frequency are one of the major problems faced by quantum computers. To understand their origin it is necessary to go beyond the analysis of their spect…
Quantum-Enhanced Greedy Combinatorial Optimization Solver
Maxime Dupont, Bram Evert, Mark J. Hodson +13
Combinatorial optimization is a broadly attractive area for potential quantum advantage, but no quantum algorithm has yet made the leap. Noise in quantum hardware remains a challen…