Selective writing and read-out of a register of static qubits

• Published in: New journal of physics Vol. 15; no. 4; pp. 43012 - 14
• Main Authors: De Pasquale, A, Ciccarello, F, Yuasa, K, Giovannetti, V
• Format: Journal Article
• Language: English
• Published: IOP Publishing 09-04-2013
• Subjects: Arrays; Degrees of freedom; Mathematical analysis; Modulation; Motional; Qubits (quantum computing); Registers; Strategy
• ISSN: 1367-2630; 1367-2630
• DOI: 10.1088/1367-2630/15/4/043012

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 or read out by means of the FQ through quantum state transfer (QST). The entire system, including the FQ's motional degrees of freedom, behaves quantum mechanically. We demonstrate a strategy allowing for selective QST between the FQ and a single SQ chosen from the register. This is achieved through a perfect mirror located beyond the SQs and suitable modulation of the inter-SQ distances.