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- W4383822908 abstract "We analyze the effect of a simple coin operator, built out of Bell pairs, in a $2d$ Discrete Quantum Random Walk (DQRW) problem. The specific form of the coin enables us to find analytical and closed form solutions to the recursion relations of the DQRW. The coin induces entanglement between the spin and position degrees of freedom, which oscillates with time and reaches a constant value asymptotically. We probe the entangling properties of the coin operator further, by two different measures. First, by integrating over the space of initial tensor product states, we determine the {it Entangling Power} of the coin operator. Secondly, we compute the {it Generalized Relative R'{e}nyi Entropy} between the corresponding density matrices for the entangled state and the initial pure unentangled state. Both the {it Entangling Power} and {it Generalized Relative R'{e}nyi Entropy} behaves similar to the entanglement with time. Finally, in the continuum limit, the specific coin operator reduces the $2d$ DQRW into two $1d$ massive fermions coupled to synthetic gauge fields, where both the mass term and the gauge fields are built out of the coin parameters." @default.
- W4383822908 created "2023-07-11" @default.
- W4383822908 creator A5024788338 @default.
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- W4383822908 date "2023-07-10" @default.
- W4383822908 modified "2023-10-14" @default.
- W4383822908 title "A simple coin for a 2d entangled walk" @default.
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- W4383822908 doi "https://doi.org/10.21468/scipostphyscore.6.3.048" @default.
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