The quantum Zeno effect and quantum feedback in cavity QED

I. Dotsenko; J. Bernu; S. Deléglise; C. Sayrin; M. Brune; J. M. Raimond; S. Haroche; M. Mirrahimi; P. Rouchon

doi:10.1088/0031-8949/2010/T140/014004

The quantum Zeno effect and quantum feedback in cavity QED

I. Dotsenko, J. Bernu, S. Deléglise, C. Sayrin, M. Brune, J. M. Raimond, S. Haroche, M. Mirrahimi, P. Rouchon

Research output: Contribution to journal › Conference article › peer-review

Abstract

We explore experimentally the fundamental projective properties of a quantum measurement and their application in the control of a system's evolution. We perform quantum non-demolition (QND) photon counting on a microwave field trapped in a very-high-Q superconducting cavity, employing circular Rydberg atoms as non-absorbing probes of light. By repeated measurement of the cavity field we demonstrated the freeze of its initially coherent evolution, illustrating the back action of the photon number measurement on the field's phase. On the contrary, by utilizing a weak QND measurement in combination with the control injection of coherent pulses, we plan to force the field to deterministically evolve towards any target photon-number state. This quantum feedback procedure will enable us to prepare and protect photon-number states against decoherence.

Original language	English
Article number	014004
Journal	Physica Scripta T
Volume	T140
DOIs	https://doi.org/10.1088/0031-8949/2010/T140/014004
Publication status	Published - 1 Dec 2010
Externally published	Yes
Event	16th Central European Workshop on Quantum Optics, CEWQO2009 - Turku, Finland Duration: 23 May 2009 → 27 May 2009

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Cite this

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title = "The quantum Zeno effect and quantum feedback in cavity QED",

abstract = "We explore experimentally the fundamental projective properties of a quantum measurement and their application in the control of a system's evolution. We perform quantum non-demolition (QND) photon counting on a microwave field trapped in a very-high-Q superconducting cavity, employing circular Rydberg atoms as non-absorbing probes of light. By repeated measurement of the cavity field we demonstrated the freeze of its initially coherent evolution, illustrating the back action of the photon number measurement on the field's phase. On the contrary, by utilizing a weak QND measurement in combination with the control injection of coherent pulses, we plan to force the field to deterministically evolve towards any target photon-number state. This quantum feedback procedure will enable us to prepare and protect photon-number states against decoherence.",

author = "I. Dotsenko and J. Bernu and S. Del{\'e}glise and C. Sayrin and M. Brune and Raimond, \{J. M.\} and S. Haroche and M. Mirrahimi and P. Rouchon",

year = "2010",

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language = "English",

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TY - JOUR

T1 - The quantum Zeno effect and quantum feedback in cavity QED

AU - Dotsenko, I.

AU - Bernu, J.

AU - Deléglise, S.

AU - Sayrin, C.

AU - Brune, M.

AU - Raimond, J. M.

AU - Haroche, S.

AU - Mirrahimi, M.

AU - Rouchon, P.

PY - 2010/12/1

Y1 - 2010/12/1

N2 - We explore experimentally the fundamental projective properties of a quantum measurement and their application in the control of a system's evolution. We perform quantum non-demolition (QND) photon counting on a microwave field trapped in a very-high-Q superconducting cavity, employing circular Rydberg atoms as non-absorbing probes of light. By repeated measurement of the cavity field we demonstrated the freeze of its initially coherent evolution, illustrating the back action of the photon number measurement on the field's phase. On the contrary, by utilizing a weak QND measurement in combination with the control injection of coherent pulses, we plan to force the field to deterministically evolve towards any target photon-number state. This quantum feedback procedure will enable us to prepare and protect photon-number states against decoherence.

AB - We explore experimentally the fundamental projective properties of a quantum measurement and their application in the control of a system's evolution. We perform quantum non-demolition (QND) photon counting on a microwave field trapped in a very-high-Q superconducting cavity, employing circular Rydberg atoms as non-absorbing probes of light. By repeated measurement of the cavity field we demonstrated the freeze of its initially coherent evolution, illustrating the back action of the photon number measurement on the field's phase. On the contrary, by utilizing a weak QND measurement in combination with the control injection of coherent pulses, we plan to force the field to deterministically evolve towards any target photon-number state. This quantum feedback procedure will enable us to prepare and protect photon-number states against decoherence.

U2 - 10.1088/0031-8949/2010/T140/014004

DO - 10.1088/0031-8949/2010/T140/014004

M3 - Conference article

AN - SCOPUS:78650889837

SN - 0281-1847

VL - T140

JO - Physica Scripta T

JF - Physica Scripta T

M1 - 014004

T2 - 16th Central European Workshop on Quantum Optics, CEWQO2009

Y2 - 23 May 2009 through 27 May 2009

ER -

The quantum Zeno effect and quantum feedback in cavity QED

Abstract

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