SOLID

Monitoring Ion Channel Function in Real Time through Quantum Decoherence

Date: 
2010-10-11
Author(s): 

L. T. Hall, C. D. Hill, J. H. Cole, B. Städler, F. Caruso, P. Mulvaney, J. Wrachtrup, L. C. L. Hollenberg

Reference: 

Proceedings of the National Academy of Sciences of the United States of America (PNAS), Vol. 107, no. 44, 18777-18782, 2010

In drug discovery, there is a clear and urgent need for detection of cell-membrane ion-channel operation with wide-field capability. Existing techniques are generally invasive or require specialized nanostructures. We show that quantum nanotechnology could provide a solution. The nitrogen-vacancy (NV) center in nanodiamond is of great interest as a single-atom quantum probe for nanoscale processes. However, until now nothing was known about the quantum behavior of a NV probe in a complex biological environment.

Circuit-QED analogue of a single-atom injection maser: Lasing, trapping states and multistability

Date: 
2010-12-16
Author(s): 

M. Marthaler, J. Leppäkangas, J. H. Cole

Reference: 

arXiv:1012.3577v1 [cond-mat.supr-con]

We study a superconducting single-electron transistor (SSET) which is coupled to a LC-oscillator via the phase difference across one of the Josephson junctions. This leads to a strongly anharmonic coupling between the SSET and the oscillator. The coupling can oscillate with the number of photons which makes this system very similar to the single-atom injection maser. However, the advantage of a design based on superconducting circuits is the strong coupling and existence of standard methods to measure the radiation field in the oscillator.

Rabi spectroscopy of a driven qubit-fluctuator system

Date: 
2010-03-25
Author(s): 

J. Lisenfeld, C. Müller, J. H. Cole, P. Bushev, A. Lukashenko, A. Shnirman, A. V. Ustinov

Reference: 

Phys. Rev. B (Rapid Comm.) 81, 100511(R) (2010)

Electric Field Induced Removal of the Biexciton Binding Energy in a Single Quantum Dot

Date: 
2011-01-12
Author(s): 

Michael E. Reimer, Maarten P. van Kouwen, Anne W. Hidma, Maarten H. M. van Weert, Erik P. A. M. Bakkers, Leo P. Kouwenhoven, and Val Zwiller

Reference: 

Nano Lett., 2011, 11 (2), pp 645–650

We control the electrostatic environment of a single InAsP quantum dot in an InP nanowire with two contacts and two lateral gates positioned to an individual nanowire. We empty the quantum dot of excess charges and apply an electric field across its radial dimension. A large tuning range for the biexciton binding energy of 3 meV is obtained in a lateral electric field.

Unitary expansion of the time evolution operator

Date: 
2010-10-21
Author(s): 

N. Zagury, A. Aragão, J. Casanova, and E. Solano

Reference: 

Phys. Rev. A 82, 042110 (2010)

We propose an expansion of the unitary evolution operator, associated with a given Schrödinger equation, in terms of a finite product of explicit unitary operators. In this manner, this unitary expansion can be truncated at the desired level of approximation, as shown in the given examples.

Circuit quantum electrodynamics in the ultrastrong-coupling regime

Date: 
2010-07-25
Author(s): 

T. Niemczyk, F. Deppe, H. Huebl, E. P. Menzel, F. Hocke, M. J. Schwarz, J. J. García-Ripoll, D.
Zueco, T. Hümmer, E. Solano, A. Marx, and R. Gross

Reference: 

Nature Physics 6, 772–776 (2010)

Klein tunneling and Dirac potentials in trapped ions

Date: 
2010-08-27
Author(s): 

J. Casanova, J. J. García-Ripoll, R. Gerritsma, C. F. Roos, and E. Solano

Reference: 

Phys. Rev. A 82, 020101(R) (2010)

Planck Spectroscopy and Quantum Noise of Microwave Beam Splitters

Date: 
2010-09-20
Author(s): 

M. Mariantoni, E. P. Menzel, F. Deppe, M. A. Araque-Caballero, A. Baust, T. Niemczyk, E.
Hoffmann, E. Solano, A. Marx, and R. Gross

Reference: 

Phys. Rev. Lett. 105, 133601 (2010)

Dual-Path State Reconstruction Scheme for Propagating Quantum Microwaves and Detector Noise Tomography

Date: 
2010-08-31
Author(s): 

E. P. Menzel, M. Mariantoni, F. Deppe, M. A. Araque-Caballero, A. Baust, T. Niemzcyk, E. Hoffmann, A. Marx, E. Solano, and R. Gross

Reference: 

Phys. Rev. Lett. 105, 100401 (2010)

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