Collapse and revival and cat states with an N-spin system

被引：31

作者：

Dooley, Shane ^{[1
]}

McCrossan, Francis ^{[1
]}

Harland, Derek ^{[2
]}

Everitt, Mark J. ^{[3
]}

Spiller, Timothy P. ^{[1
]}

机构：

[1] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[2] Loughborough Univ Technol, Dept Math Sci, Loughborough LE11 3TU, Leics, England

[3] Loughborough Univ Technol, Dept Phys, Loughborough LE11 3TU, Leics, England

来源：

PHYSICAL REVIEW A | 2013年 / 87卷 / 05期

关键词：

JAYNES-CUMMINGS MODEL; QUANTUM;

D O I：

10.1103/PhysRevA.87.052323

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We discuss collapse and revival of Rabi oscillations in a system comprising a qubit and a "big spin" (made of N qubits, or spin-1/2 particles). We demonstrate a regime of behavior analogous to conventional collapse and revival for a qubit-field system, employing spin coherent states for the initial state of the big spin. These dynamics can be used to create a cat state of the big spin. Even for relatively small values of N, states with significant potential for quantum metrology applications can result, giving sensitivity approaching the Heisenberg limit.

引用

页数：6

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