2016/09/30 by Alastair Kay
Computer Science · Engineering · Mathematics · Physics and Astronomy · #Algorithm #Chain (unit) #Computer science #Condensed matter physics #Engineering #Excitation #Mathematical analysis #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum mechanics #Qubit #Range (aeronautics) #Separable space #Spin (aerodynamics) #Spin states #State (computer science) #Statistical physics #quant-ph
paper · pdf · doi:10.22331/q-2017-08-10-24
published as Quantum 1, 24 (2017) · v3: 11 pages, 8 figures. Accepted version
arxiv created 2017/08/09 · openalex publication_date 2017/08/10 · arxiv updated 2017/08/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The production of quantum states required for use in quantum protocols & technologies is studied by developing the tools to re-engineer a perfect state transfer spin chain so that a separable input excitation is output over multiple sites. We concentrate in particular on cases where the excitation is superposed over a small subset of the qubits on the spin chain, known as fractional revivals, demonstrating that spin chains are capable of producing a far greater range of fractional revivals than previously known, at high speed. We also provide a numerical technique for generating chains that produce arbitrary single-excitation states, such as the W state.