Controllable single-photon transport between remote coupled-cavity arrays

Abstract

We develop a new approach for controllable single-photon transport between two remote onedimensional coupled-cavity arrays, used as quantum registers, mediated by an additional onedimensional coupled-cavity array, acting as a quantum channel. A single two-level atom located inside one cavity of the intermediate channel is used to control the long-range coherent quantum coupling between two remote registers, thereby functioning as a quantum switch. With a timeindependent perturbative treatment, we find that the leakage of quantum information can in principle be made arbitrarily small. Furthermore, our method can be extended to realize a quantum router in multi-register quantum networks, where single-photons can be either stored in one of the registers or transported to another on demand. These results are confirmed by numerical simulations.

Heralded quantum controlled-phase gates with dissipative dynamics in macroscopically distant resonators

“…Although we have chosen to discuss the specific case of two coupled resonators, this description may be extended to a coupled-cavity array [63][64][65][66][67]. Hence, it would enable applications such as scalable quantum information processing and long-distance quantum communication.…”

Method of images applied to driven solid-state emitters

“…The limiting case of the Fabry-Pérot cavity, effectively reducing to a single perfectly reflecting surface. The arrows indicate the wavevectors in (5) and (10), and r denotes the surface reflection coefficient 7,36 .…”

“…Mirrors have widespread use for directing light from sources that emit across a extended solid angle, for example in the form parabolic reflectors in everyday light sources. On the nanoscale, precise guiding of photons into particular optical modes is of paramount importance for quantum information processing and communication, where on demand single photons are required [9][10][11][12] . Although micron-sized spherical mirrors for open access microcavities 13 have recently enabled the investigation of quantum dot-cavity systems in the strong coupling regime 14,15 , the use of sophisticated mirrors remains a challenge for solid-state quantum emitters that are often embedded in heterogenous layers of substrates with varying refractive indices.…”

Atomic switch for control of heat transfer in coupled cavities

“…Highly tunable cavity couplings and resonance frequencies of coupled cavities make them suitable for photon transfer, quantum state transfer, entanglement generation, etc [5][6][7][8][9][10]. Transport of photons in an array can be modified by embedding atoms or Kerr-medium in the cavities which modify the cavity resonance frequencies [11][12][13][14][15]. This helps to realize phenomenon such as photon blockade [11], quantum state switching [2], generation of cat states [16], localization and delocalization [17,18], etc.…”