Quantum jumps of light recording the birth and death of a photon in a cavity

  title={Quantum jumps of light recording the birth and death of a photon in a cavity},
  author={S. Gleyzes and Stefan Kuhr and Christine Guerlin and Julien Bernu and Samuel Deleglise and Ulrich Busk Hoff and M. Brune and Jean-Michel Raimond and Serge Haroche},
A microscopic quantum system under continuous observation exhibits at random times sudden jumps between its states. The detection of this quantum feature requires a quantum non-demolition (QND) measurement repeated many times during the system’s evolution. Whereas quantum jumps of trapped massive particles (electrons, ions or molecules) have been observed, this has proved more challenging for light quanta. Standard photodetectors absorb light and are thus unable to detect the same photon twice… 

Recording the Birth and Death of a Photon in a Cavity

Summary form only given. A microscopic system under continuous observation exhibits at random times sudden jumps between its states. Quantum jumps of trapped massive particles (electrons, ions or

Irreversible Qubit-Photon Coupling for the Detection of Itinerant Microwave Photons

Single photon detection is a key resource for sensing at the quantum limit and the enabling technology for measurement based quantum computing. Photon detection at optical frequencies relies on

Observing quantum state diffusion by heterodyne detection of fluorescence

A qubit can relax by fluorescence, which prompts the release of a photon into its electromagnetic environment. By counting the emitted photons, discrete quantum jumps of the qubit state can be

The quantum Zeno effect and quantum feedback in cavity QED

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

Generation and reconstruction of schrödinger cat states of light in a cavity by quantum nondemolition measurements

  • I. DotsenkoS. Deleglise S. Haroche
  • Physics
    CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference
  • 2009
The quantum nondemolition (QND) method for photon counting, recently developed at ENS [1,2], can be used for determining the photon number distribution of a light field by repeating the measurement

Quantum scanning microscope for cold atoms

We present a detailed theoretical description of an atomic scanning microscope in a cavity QED setup proposed in Phys. Rev. Lett. 120, 133601 (2018). The microscope continuously observes atomic

Tracking photon jumps with repeated quantum non-demolition parity measurements

The quantum non-demolition parity tracking of a possible error syndrome, namely the photon number parity of a microwave cavity, is tracked by mapping this property onto an ancilla quantum bit, whose only role is to facilitate quantum state manipulation and measurement.

Measuring the photon number parity in a cavity: from light quantum jumps to the tomography of non-classical field states

The photon number parity is a binary observable playing an important role in the description of the non-classical features of light. In microwave experiments, this observable can be measured by using

Single Microwave Photons Spotted on the Rebound A cavity-confined qubit can register the reflection of a single microwave photon without destroying it

S ingle optical photon detectors typically absorb an incoming photon and use that energy to generate an electrical signal, or “click,” that indicates the arrival of a single quantum of light. Such a

Progressive field-state collapse and quantum non-demolition photon counting

The observation of such a step-by-step collapse by non-destructively measuring the photon number of a field stored in a cavity is reported, which illustrates all the postulates of quantum measurement (state collapse, statistical results and repeatability) and should facilitate studies of non-classical fields trapped in cavities.



Seeing a single photon without destroying it

Light detection is usually a destructive process, in that detectors annihilate photons and convert them into electrical signals, making it impossible to see a single photon twice. But this limitation

Manipulation of photons in a cavity by dispersive atom-field coupling: Quantum-nondemolition measurements and generation of "Schrödinger cat" states.

The possibility of photon ``manipulation'' through nonresonant atom-field interactions opens a domain in cavity QED studies by using circular Rydberg atoms and very high-Q superconducting microwave cavities.

Direct spectroscopic observation of quantum jumps of a single molecule

BOHR'S notion of quantum jumps between electronic states of an excited atom has now been demonstrated experimentally for single ions confined in radio-frequency traps and interacting with a driving

Manipulating quantum entanglement with atoms and photons in a cavity

After they have interacted, quantum particles generally behave as a single nonseparable entangled system. The concept of entanglement plays an essential role in quantum physics. We have performed

Observation of quantum jumps.

They were mostly considered, at that time and even later, a kind of artifact of Bohr's model of the atom whose real existence was questionable and, anyway, not to be verified with the common large

Measuring photon numbers in a cavity by atomic interferometry: optimizing the convergence procedure

. We describe the optimum detection procedure to follow in order to measure by atomic interferometry the number of photons present in a cavity by using a Quantum nondemolition scheme. The method we

Resolving photon number states in a superconducting circuit

A circuit QED experiment is reported in the strong dispersive limit, a new regime where a single photon has a large effect on the qubit without ever being absorbed, the basis of a logic bus for a quantum computer.

Quantum nondemolition measurements

  • P. Grangier
  • Physics
    Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)
  • 2000
Summary form only given. The present techniques allow one to perform continuous or discrete quantum measurements at or even beyond the standard "quantum noise" level, even on single quantum objects.

Observing the Quantum Limit of an Electron Cyclotron: QND Measurements of Quantum Jumps between Fock States

Quantum jumps between Fock states of a one-electron oscillator reveal the quantum limit of a cyclotron. With a surrounding cavity inhibiting synchrotron radiation 140-fold, the jumps show a 13 s Fock