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

Shane Dooley; Francis McCrossan; Derek Harland; Mark J. Everitt; Timothy P. Spiller

doi:10.1103/PhysRevA.87.052323

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

Shane Dooley^*, Francis McCrossan, Derek Harland, Mark J. Everitt, Timothy P. Spiller

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Article number	052323
Journal	Physical Review A
Volume	87
Issue number	5
Early online date	24 May 2013
DOIs	https://doi.org/10.1103/PhysRevA.87.052323
Publication status	Published - May 2013

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10.1103/PhysRevA.87.052323

Cite this

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title = "Collapse and revival and cat states with an N-spin system",

abstract = "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.",

author = "Shane Dooley and Francis McCrossan and Derek Harland and Everitt, {Mark J.} and Spiller, {Timothy P.}",

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AU - McCrossan, Francis

AU - Harland, Derek

AU - Everitt, Mark J.

AU - Spiller, Timothy P.

PY - 2013/5

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AB - 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.

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DO - 10.1103/PhysRevA.87.052323

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JO - Physical Review A

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