Nondestructive readout for a superconducting flux qubit

被引：89

作者：

Lupascu, A ^{[1
]}

Verwijs, CJM ^{[1
]}

Schouten, RN ^{[1
]}

Harmans, CJPM ^{[1
]}

Mooij, JE ^{[1
]}

机构：

[1] Delft Univ Technol, Kavli Inst Nanosci, NL-2600 GA Delft, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.93.177006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a new readout method for a superconducting flux qubit, based on the measurement of the Josephson inductance of a superconducting quantum interference device that is inductively coupled to the qubit. The intrinsic flux detection efficiency and backaction are suitable for a fast and nondestructive determination of the quantum state of the qubit, as needed for readout of multiple qubits in a quantum computer. We performed spectroscopy of a flux qubit and we measured relaxation times of the order of 80 mus.

引用

页码：177006 / 1

页数：4

共 16 条

[1] Cryogenic, low-noise, balanced amplifiers for the 300-1200 MHz band using heterostructure field-effect transistors [J].

Bradley, RF .

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 1999, 72 :137-144

[2] Coherent quantum dynamics of a superconducting flux qubit [J].

Chiorescu, I ;

Nakamura, Y ;

Harmans, CJPM ;

Mooij, JE .

SCIENCE, 2003, 299 (5614) :1869-1871

[3] Coherent dynamics of a Josephson charge qubit [J].

Duty, T ;

Gunnarsson, D ;

Bladh, K ;

Delsing, P .

PHYSICAL REVIEW B, 2004, 69 (14) :140503-1

[4] Low-frequency measurement of the tunneling amplitude in a flux qubit -: art. no. 060501 [J].

Grajcar, M ;

Izmalkov, A ;

Il'ichev, E ;

Wagner, T ;

Oukhanski, N ;

Hübner, U ;

May, T ;

Zhilyaev, I ;

Hoenig, HE ;

Greenberg, YS ;

Shnyrkov, VI ;

Born, D ;

Krech, W ;

Meyer, HG ;

van den Brink, AM ;

Amin, MHS .

PHYSICAL REVIEW B, 2004, 69 (06)

[5] Rabi oscillations in a large Josephson-junction qubit [J].

Martinis, JM ;

Nam, S ;

Aumentado, J ;

Urbina, C .

PHYSICAL REVIEW LETTERS, 2002, 89 (11) :1-117901

[6] Josephson persistent-current qubit [J].

Mooij, JE ;

Orlando, TP ;

Levitov, L ;

Tian, L ;

van der Wal, CH ;

Lloyd, S .

SCIENCE, 1999, 285 (5430) :1036-1039

[7]

Mück M, 2001, APPL PHYS LETT, V78, P967, DOI 10.1063/1.1347384

[8] Coherent control of macroscopic quantum states in a single-Cooper-pair box [J].

Nakamura, Y ;

Pashkin, YA ;

Tsai, JS .

NATURE, 1999, 398 (6730) :786-788

[9]

Nielsen Michael A, 2002, Quantum computation and quantum information, DOI DOI 10.1119/1.1463744

[10]

SIDDIQI I, IN PRESS PHYS REV LE

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