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Showing 2012 · quant-phShow all
3 papers · 2 filters
quant-ph2012★ 2 cited
Selective writing and read-out of a register of static qubits
A. De Pasquale, F. Ciccarello, K. Yuasa +1
We propose a setup comprising an arbitrarily large array of static qubits (SQs), which interact with a flying qubit (FQ). The SQs work as a quantum register, which can be written o…
quant-ph2012★ 18 cited
Possibility of a minimal purity-measurement scheme critically depends on the parity of dimension of the quantum system
Toru Tanaka, Gen Kimura, Hiromichi Nakazato
In this paper, we investigate the possibility of measuring the purity of a quantum state (and the overlap between two quantum states) within a minimal model where the measurement d…
quant-ph2012★ 25 cited
A measurement scheme for purity based on two two-body gates
Hiromichi Nakazato, Toru Tanaka, Kazuya Yuasa +2
A scheme for measuring the purity of a quantum system with a finite number of levels is presented. The method makes use of two square root of SWAP gates and only hinges on measurem…