Heralded single-photon absorption by a single atom

Piro, Nicolás; Rohde, Felix; Schuck, Carsten; Almendros, M.; Huwer, Jan; Ghosh, Joyee; Haase, Andrea; Hennrich, Markus; Dubin, F.; Eschner, J.

doi:10.1038/nphys1805

Cited by 111 publications

(128 citation statements)

References 43 publications

Supporting

Mentioning

127

Contrasting

Order By: Relevance

“…These photons are focused onto a single atom trapped in a far-off-resonant optical dipole trap. From the fraction of photons that are scattered out of this focused excitation mode we can accurately obtain the the transient atomic excitation [13,[31][32][33].…”

Section: Methodsmentioning

confidence: 99%

Photon bandwidth dependence of light-matter interaction

et al. 2017

View full text Add to dashboard Cite

We investigate the scattering of single photons by single atoms and, in particular, the dependence of the atomic dynamics and the scattering probability on the photon bandwidth. We tightly focus the incident photons onto a single trapped 87 Rb atom and use the time-resolved transmission to characterize the interaction strength. Decreasing the bandwidth of the single photons from 6 to 2 times the atomic linewidth, we observe an increase in atomic peak excitation and photon scattering probability.

show abstract

Section: Methodsmentioning

confidence: 99%

Photon bandwidth dependence of light-matter interaction

et al. 2017

View full text Add to dashboard Cite

show abstract

“…This source has been described earlier in more detail [20,21] where it has been used to herald the absorption of a single-photon by a single trapped ion. It consists of a diode laser system at 854 nm which is actively stabilized to an atomic transition in calcium (…”

Section: Quantum and Classical Channel In A Single Fibermentioning

confidence: 99%

Single telecom photon heralding by wavelength multiplexing in an optical fiber

et al. 2016

View full text Add to dashboard Cite

We demonstrate the multiplexing of a classical coherent and a quantum state of light in a single telecommunciation fiber. For this purpose we make use of spontaneous parametric down conversion and quantum frequency conversion to generate photon pairs at 854 nm and the telecom O-band. The herald photon triggers a telecom C-band laser pulse. The telecom single photon and the laser pulse are combined and coupled to a standard telecom fiber. Low background time correlation of the classical and quantum signal behind the fiber shows successful telecommunication channel multiplexing.

show abstract

“…Due to the heralding, high fidelity will be achieved independent of the efficiency of the process. We describe in detail the requirements and conditions for such heralded quantum storage processes for the case of singly ionized calcium-40, the species used in our [8][9][10][11] and other experiments [12][13][14][15][16]. Application to other species is straightforward.…”

mentioning

confidence: 99%

“…In our set-up [8][9][10][11], we use high-aperture laser objectives (HALO) for optimizing the single-photon absorption and detection efficiency. As both HALOs are on one axis, the condition α = α is preferred, which is satisfied by the schemes (a) and (c)-(e).…”

mentioning

confidence: 99%

Single calcium-40 ion as quantum memory for photon polarization: a case study

Müller

Eschner

2013

Appl. Phys. B

View full text Add to dashboard Cite

We present several schemes for heralded storage of polarization states of single photons in single ions, using the 40 Ca + ion and photons at 854 nm wavelength as specific example. We compare the efficiencies of the schemes and the requirements for their implementation with respect to the preparation of the initial state of the ion, the absorption process and its analysis. These schemes may be used to create and herald entanglement of two distant ions through entanglement swapping; they are easily adapted to other atomic systems and wavelengths.The controlled transfer of quantum states between different systems is a cornerstone in the realization of quantum networks. One proposed implementation [1] of such a network employs single atoms for storing information (i. e., as nodes of the network) and single photons for transmitting information (i. e., as channels of the network); they are interfaced through controlled absorption and emission.In atom-photon interaction, the conservation of angular momentum relates the internal state of the atom with the polarization state of the exchanged photon. In emission, this generates atom-photon entanglement which may be used to prepare a certain superposition of Zeeman sublevels in the atom by measuring an emitted photon in a certain polarization basis [2,3], or to preserve such a superposition state in the context of quantum error correction [4]. In absorption, a certain polarization state of the photon excites the absorbing atom into the corresponding superposition of Zeeman sublevels. Using neutral rubidium-87 in this way as a quantum memory for an arbitrary polarization state of a photon at 780 nm has been proposed by [5] and put into effect by [6,7], using optical cavities to attain high efficiency.Here, we propose schemes employing both absorption and emission to implement heralded storage of the polarization state of a photon. First, the atom is prepared in a pure state ready to absorb a single photon. The absorption of a (certain but unknown) polarization state excites the atom into a corresponding superposition. Afterward, the excited atomic levels decay to different final levels, and another photon is emitted, which is entangled with the atom. By choosing the proper detection basis for this photon, the emission channels are made indistinguishable and the detection heralds the storage process but does not reveal the stored information. Due to the heralding, high fidelity will be achieved independent of the efficiency of the process. We describe in detail the requirements and conditions for such heralded quantum storage processes for the case of singly ionized calcium-40, the species used in our [8][9][10][11] and other experiments [12][13][14][15][16]. Application to other species is straightforward.In the proposed quantum-memory schemes, a single 40 Ca + ion is used to store the polarization state of a single photon at 854 nm wavelength (cf. fig. 1 a): the absorption happens on the 3 D 5/2 -4 P 3/2 transition and the emission of the herald takes place on the 4 P 3/2...

show abstract

Heralded single-photon absorption by a single atom

Cited by 111 publications

References 43 publications

Photon bandwidth dependence of light-matter interaction

Photon bandwidth dependence of light-matter interaction

Single telecom photon heralding by wavelength multiplexing in an optical fiber

Single calcium-40 ion as quantum memory for photon polarization: a case study

Contact Info

Product

Resources

About