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quant-ph2019
Unitary circuits of finite depth and infinite width from quantum channels
Sarang Gopalakrishnan, Austen Lamacraft
We introduce an approach to compute reduced density matrices for local quantum unitary circuits of finite depth and infinite width. Suppose the time-evolved state under the circuit…
quant-ph2019
Spectral gaps and mid-gap states in random quantum master equations
Tankut Can, Vadim Oganesyan, Dror Orgad +1
We discuss the decay rates of chaotic quantum systems coupled to noise. We model both the Hamiltonian and the system-noise coupling by random Hermitian matrices, and s…