QUANTUM PHASE GATING WITH SEMICONDUCTOR QUANTUM DOTS IN A MICROCAVITY

We propose a scheme to carry out quantum phase gate in one step by bichromatic radiation method with semiconductor quantum dots (QDs) embedded in a single mode microcavity. The spin degrees of freedom of the only excess conduction band electron are employed as qubits and excitonic states are used as auxiliary states. The nearest-neighbor coupling is not required because the cavity mode plays the role of data bus. We show how to perform quantum computing with properly tailored laser pulses and Pauli-blocking effect, without exciting the cavity mode.

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Excited excitonic states observed in semiconductor quantum dots using polarization resolved optical spectroscopy

Journal of Applied Physics ◽

10.1063/1.2722729 ◽

2007 ◽

Vol 101 (8) ◽

pp. 081703 ◽

Cited By ~ 20

Author(s):

V. Troncale ◽

K. F. Karlsson ◽

D. Y. Oberli ◽

M. Byszewski ◽

A. Malko ◽

...

Keyword(s):

Quantum Dots ◽

Optical Spectroscopy ◽

Semiconductor Quantum Dots ◽

Excitonic States

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Introduction

10.1093/oso/9780198807308.003.0001 ◽

2018 ◽

Author(s):

M. M. Glazov

Keyword(s):

Quantum Dots ◽

Spin Relaxation ◽

Degrees Of Freedom ◽

Semiconductor Quantum Dots ◽

Charge Carriers ◽

Spin Transfer ◽

The Other ◽

Concise Overview ◽

Semiconductor Spintronics

Creation, detection, and manipulation of spin degrees of freedom of electrons and nuclei, phenomena of spin relaxation, decoherence and dephasing, and processes of spin transfer between different subsystems are among the most important problems studied in semiconductor spintronics. These effects are most pronounced in systems with localized charge carriers, such as semiconductor quantum dots. This chapter contains the motivation behind and a brief review of the material presented in the book. It also clarifies the logic of the presentation in further chapters. Chapter 1 may be helpful to readers willing to find appropriate material without going through the whole book, as it contains a concise overview of the other chapters.

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Interaction of picosecond laser pulses with semiconductor quantum dots and wires

Proceedings of 5th European Quantum Electronics Conference ◽

10.1109/eqec.1994.698500 ◽

2005 ◽

Author(s):

V. Dneprovskii ◽

N. Guschina ◽

V. Karavansky ◽

A. Karelina ◽

V. Klimov ◽

...

Keyword(s):

Quantum Dots ◽

Picosecond Laser ◽

Laser Pulses ◽

Semiconductor Quantum Dots ◽

Picosecond Laser Pulses

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JOSEPHSON DECOUPLING PHASE IN INHOMOGENEOUS ARRAYS OF SUPERCONDUCTING QUANTUM DOTS

International Journal of Modern Physics B ◽

10.1142/s0217979212501081 ◽

2012 ◽

Vol 26 (19) ◽

pp. 1250108

Author(s):

SUJIT SARKAR

Keyword(s):

Quantum Dots ◽

Phase Analysis ◽

Coulomb Interaction ◽

Coulomb Blockade ◽

Nearest Neighbor ◽

Quantum Phase ◽

Coupling Term ◽

Half Filling ◽

Charging Energy

A quantum phase analysis of inhomogeneous arrays of superconducting quantum dots (SQD) is presented. Existence of Josephson decoupling (JD) phase is observed at the half-filling. It occurs due to fluctuations of Josephson couplings over the sites. This JD phase is the phase incoherent gapped state of the system. In JD phase superconductivity disappears even in the absence of Coulomb blockade phase. It is also observed that the inhomogeneity of on-site Coulomb charging energy produces the relevant coupling term that yields Coulomb blockade gapped phase. The presence of nearest-neighbor and next-nearest-neighbor Coulomb interaction yields the same physics for inhomogeneous and homogeneous SQD.

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