Experimental Characterization of Bosonic Creation and Annihilation Operators

Kumar, Rupesh; Barrios, E.; Kupchak, Connor; Lvovsky, A. I.

doi:10.1103/physrevlett.110.130403

Cited by 53 publications

(77 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This state is generated from the two-mode squeezed vacuum state given in Eq. (1) When the SPDs register a coincidence detection, the twophoton-subtracted two-mode squeezed vacuum state is heralded [43,44]. The Wigner function of the two-photon-subtracted two-mode squeezed vacuum state is non-Gaussian, and is given by…”

Section: Non-gaussian Entanglementmentioning

confidence: 99%

Non-Gaussian entangled states and quantum teleportation of Schrödinger-cat states

Seshadreesan¹,

Dowling²,

Agarwal³

2015

Phys. Scr.

View full text Add to dashboard Cite

In continuous-variable quantum information, non-Gaussian entangled states that are obtained from Gaussian entangled states via photon subtraction are known to contain more entanglement. This makes them better resources for quantum information processing protocols, such as, quantum teleportation. We discuss the teleportation of non-Gaussian, non-classical Schrödinger-cat states of light using two-mode squeezed vacuum light that is made non-Gaussian via subtraction of a photon from each of the two modes. We consider the experimentally realizable cat states produced by subtracting a photon from the single-mode squeezed vacuum state. We discuss two figures of merit for the teleportation process, a) the fidelity, and b) the maximum negativity of the Wigner function at the output. We elucidate how the non-Gaussian entangled resource lowers the requirements on the amount of squeezing necessary to achieve any given fidelity of teleportation, or to achieve negative values of the Wigner function at the output.

show abstract

Section: Non-gaussian Entanglementmentioning

confidence: 99%

Non-Gaussian entangled states and quantum teleportation of Schrödinger-cat states

Seshadreesan¹,

Dowling²,

Agarwal³

2015

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…This operation is intrinsically nondeterministic (i.e. non-trace-preserving) [34], which succeeds only if a desired outcome is obtained as measuring an ancillary system [11,25]. In the multimode case, on the other hand, single-photon subtraction can be diverse because it can consist of, for example, one annihilation operator from multiple modes or several annihilation operators from multiple modes, added as a superposition or as a mixture.…”

Section: Description Of a General Single-photon Subtractionmentioning

confidence: 99%

Tomography of mode-tunable coherent single-photon subtractor

Jacquard

Dufour

et al. 2017

Conference on Lasers and Electro-Optics

View full text Add to dashboard Cite

Single-photon subtraction plays important roles in optical quantum information processing as it provides a non-Gaussian characteristic in continuous-variable quantum information. While the conventional way of implementing single-photon subtraction based on a low-reflectance beam splitter works properly for a single-mode quantum state, it is unsuitable for a multimode quantum state because a single photon is subtracted from all multiple modes without maintaining their mode coherence. Here we experimentally implement and characterize a mode-tunable coherent singlephoton subtractor based on sum frequency generation. It can subtract a single photon exclusively from one desired time-frequency mode of light or from a coherent superposition of multiple timefrequency modes. To fully characterize the implemented single-photon subtractions, we employ quantum process tomography based on coherent states. The mode-tunable coherent single-photon subtractor will be an essential element for realizing non-Gaussian quantum networks necessary to get a quantum advantage in information processing.

show abstract

“…[31], POVM elements of a single-photon detector were reconstructed from measurements on probe coherent states by solving a convex optimization problem that included an extra constraint arXiv:1508.01711v1 [quant-ph] 7 Aug 2015 which ensured a smooth structure of the reconstructed POVM elements. Later on, maximum-likelihood estimation was employed for reconstruction of quantum operations and detectors probed with coherent states [30,33]. This latter approach avoids the complications with direct linear inversion (2), but it requires some truncation of the infinite-dimensional operator χ.…”

Section: Introductionmentioning

confidence: 99%

Continuous-variable quantum process tomography with squeezed-state probes

Fiurášek¹

2015

Phys. Rev. A

View full text Add to dashboard Cite

We propose a procedure for tomographic characterization of continuous variable quantum operations which employs homodyne detection and single-mode squeezed probe states with a fixed degree of squeezing and anti-squeezing and a variable displacement and orientation of squeezing ellipse. Density matrix elements of a quantum process matrix in Fock basis can be estimated by averaging well behaved pattern functions over the homodyne data. We show that this approach can be straightforwardly extended to characterization of quantum measurement devices. The probe states can be mixed, which makes the proposed procedure feasible with current technology.

show abstract

Experimental Characterization of Bosonic Creation and Annihilation Operators

Cited by 53 publications

References 38 publications

Non-Gaussian entangled states and quantum teleportation of Schrödinger-cat states

Non-Gaussian entangled states and quantum teleportation of Schrödinger-cat states

Tomography of mode-tunable coherent single-photon subtractor

Continuous-variable quantum process tomography with squeezed-state probes

Contact Info

Product

Resources

About