Error-detected single-photon quantum routing using a quantum dot and a double-sided microcavity system

Abstract

Based on a hybrid system consisting of a quantum dot coupled with a double-sided micropillar cavity, we investigate the implementation of an error-detected photonic quantum routing controlled by the other photon. The computational errors from unexpected experimental imperfections are heralded by single photon detections, resulting in a unit fidelity for the present scheme, so that this scheme is intrinsically robust. We discuss the performance of the scheme with currently achievable experimental parameters. Our results show that the present scheme is efficient. Furthermore, our scheme could provide a promising building block for quantum networks and distributed quantum information processing in the future.

Single-photon scattering and quantum entanglement of two giant atoms with azimuthal angle differences in a waveguide system

“…[1][2][3] In the past decades, waveguide quantum electrodynamics (wQED) systems, [4] which can tailor effectively the coupling between one-dimensional waveguide modes and quantum emitters, have provided powerful platforms to investigate the photon scattering. Based on such ideal platforms, a wide variety of striking transport properties in one-dimensional waveguides have been demonstrated, including asymmetrical Fano-line shapes, [5][6][7][8] electromagnetically induced transparency without control light field, [9][10][11] waveguide-mediated quantum entanglement, [12][13][14][15] unconventional photon blockade, [16][17][18][19] high-efficiency quantum routing and frequency conversion, [20][21][22][23][24][25] generating photonic band structures and bound states, [26][27][28] etc.…”

Fast achievement of quantum state transfer and distributed quantum entanglement by dressed states*

“…[6] Quantum entanglement, an interesting and important phenomenon in quantum mechanics, is an important resource of quantum information processing, [7] such as quantum teleportation, [8,9] quantum secret sharing and secret splitting, [10] location-dependent communications, [11] quantum communication network, [12] and so on. Lately, the preparation of quantum entanglement is becoming more and more important and has been widely studied in cavity QED systems, [13][14][15][16][17][18][19] spin ensembles system, [20] multidimensional engineering system, [21] solid-state spin system, [22] nitrogenvacancy centers system, [23] a quantum router, [24] (in a quantum router, an error-detected method has been proposed [25] ) and so on. In addition, entangled states can also be prepared by controlled phase gate.…”

Optical amplification of single-photon polarization qubit using weak measurement

“…s photons are the best carriers of long-range quantum information, single-photon transmission plays an important role in quantum communication proposals, such as quantum key distribution, [1][2][3][4] quantum secure direct communication, 5,6) and other applications. [7][8][9][10][11][12] However, the photon loss during the transmission over noisy channels leads to the limitation in security and distance of the communication process. Single-photon amplification is a promising method to overcome the photon loss problem by amplifying the probability of non-vacuum state, 13) which can be achieved by using single-photon or entangled photon pairs as auxiliary.…”