WO2010008049A1 - 量子状態転送方法及び量子状態転送システム装置、並びに、量子演算方法及び量子演算装置 - Google Patents
量子状態転送方法及び量子状態転送システム装置、並びに、量子演算方法及び量子演算装置 Download PDFInfo
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- the present invention is based on the priority claim of Japanese patent application: Japanese Patent Application No. 2008-186256 (filed on July 17, 2008), the entire contents of which are incorporated herein by reference. Shall.
- the present invention relates to a quantum state transfer method and quantum state transfer system apparatus that transfer quantum states, and a quantum operation method and quantum operation apparatus that perform operations on quantum states.
- Quantum teleportation is the transfer of the quantum state of an input qubit to an output qubit using a qubit pair in a quantum mechanical entangled state (also known as quantum entanglement or quantum entanglement).
- the quantum states of two qubits orthogonal to each other are defined as
- four bell states orthogonal to each other with respect to two qubits are represented by
- ⁇ ⁇ > (
- ⁇ ⁇ > (
- the bell state is a quantum mechanically entangled state.
- I is a unit matrix
- Quantum teleportation that is, quantum state transfer
- Non-Patent Document 1 Quantum teleportation
- a quantum mechanically entangled qubit pair is generated (procedure 1).
- the first qubit is represented by A and the second qubit is represented by B, and the quantum state of the qubit pair is
- ⁇ + > AB (
- bell state measurement is performed for the input qubit and qubit A (procedure 2).
- the Bell state measurement two qubits states, four Bell states ⁇
- the state of the qubit B becomes a state ⁇ i ⁇ i obtained by subjecting ⁇ to unitary transformation ⁇ i .
- the unitary transformation ⁇ i is applied to the qubit B (procedure 3).
- the state ⁇ i ⁇ i of the qubit B in the procedure 2 is transformed into ⁇ . Therefore, the state of the input qubit is transferred to the output qubit by using the unitary transformed qubit B as the output qubit.
- the sender has an input qubit and a qubit A
- the receiver has a qubit B
- the transmitter performs a bell state measurement
- the measurement result i In order to distinguish it from quantum communication, it is called classical communication.
- the quantum state can be transferred from the sender to the receiver even if the sender and the receiver are far away from each other.
- the quantum operation f can be executed independently of the measurement of the input state. Therefore, even if it takes a long time to execute the quantum operation f, it is possible to speed up the operation in the quantum operation unit by simultaneously performing the measurement of the input state and the quantum operation f.
- the state of the qubit B is f ( ⁇ i ⁇ i ) and does not match f ( ⁇ ). Since the quantum operation f and the unitary transformation ⁇ i are not generally exchanged, even if the unitary transformation ⁇ i is applied to f ( ⁇ i ⁇ i ), the desired output state f ( ⁇ ) cannot be obtained, and the quantum operation f will fail.
- Patent Document 1 a quantum teleportation device and a control NOT arithmetic device are described.
- Patent Document 2 describes a highly efficient quantum state transfer method using a squeezed state.
- Patent Document 3 describes a quantum communication method for realizing teleportation of qubits.
- the necessity of performing unitary transformation ⁇ i is a problem when quantum teleportation is used as a quantum computing unit.
- a desired output state f ( ⁇ ) cannot be obtained when the result of the bell state measurement is i ⁇ 0.
- the receiver can perform the next processing on the output qubit without waiting for classical communication from the transmitter, and a quantum state transfer method and quantum Providing a state transfer system device is an issue.
- the quantum state transfer method is: A transmitter device performing measurements on a first qubit sequence of three or more qubits and an input qubit; According to the result of the measurement, the receiving device has one qubit from a qubit comprised of three or more qubits and included in a second qubit string quantum entangled with the first qubit string. And selecting as an output qubit.
- the quantum state transfer method of the first development form includes a step in which the qubit generation device generates the first qubit string and the second qubit string.
- the quantum state transfer method of the second development form includes a step in which the qubit generation device entangles the first qubit string and the second qubit string in a quantum mechanical manner.
- the first qubit string, the second qubit string, and the input / output qubits each have a complex of a plurality of qubits or three or more quantum levels.
- a system is preferred.
- the measurement may be POVM (Positive Operator Valued Measure) measurement.
- the quantum computation method is: A step in which a quantum arithmetic unit performs measurement on a first qubit string composed of three or more qubits and an input qubit; Performing quantum operations on qubits comprised of two or more qubits comprising three or more qubits and quantangically entangled with the first qubit string; Selecting one qubit from the qubits subjected to the quantum operation in accordance with the result of the measurement to obtain an output qubit.
- the quantum operation method of the fifth development form preferably includes a step in which the quantum operation device generates the first qubit string and the second qubit string.
- the quantum operation method of the sixth development form preferably includes a step in which the quantum operation device entangles the first qubit string and the second qubit string in a quantum mechanical manner.
- the first qubit string, the second qubit string, and the input / output qubit each have a composite of a plurality of qubits or a quantum system having three or more quantum levels. It is preferable that
- a quantum state transfer system device is: A transmitter for performing measurement on a first qubit sequence composed of three or more qubits and an input qubit; According to the result of the measurement, one qubit is selected from qubits that are composed of three or more qubits and included in the second qubit string quantum mechanically entangled with the first qubit string. And a receiving device for output qubits.
- the quantum state transfer system apparatus generates a first qubit string and a second qubit string and entangles the generated first qubit string and the second qubit string quantum-mechanically. It is preferable that a qubit generation device is provided.
- each of the first qubit string, the second qubit string, and the input / output qubits has a composite of a plurality of qubits or three or more quantum levels.
- a quantum system is preferred.
- the measurement may be a POVM (Positive Operator Valued Measure) measurement.
- a transmitting apparatus is: A quantum measurement unit that performs measurement on a first qubit string composed of three or more qubits and an input qubit; A communication unit that transmits the result of the measurement to the receiving device.
- the receiving apparatus is: A communication unit that receives a result of a measurement performed on a first qubit string composed of three or more qubits and an input qubit; According to the result of the measurement, one qubit is selected from qubits that are composed of three or more qubits and included in the second qubit string quantum mechanically entangled with the first qubit string.
- a qubit selection unit that outputs qubits.
- the quantum arithmetic device is: A quantum measurement unit that performs measurement on a first qubit string composed of three or more qubits and an input qubit; A quantum operation unit configured to perform a quantum operation on a qubit included in a second qubit sequence that is composed of three or more qubits and is quantum-mechanically entangled with the first qubit sequence; A qubit selection unit that selects one qubit from the qubits subjected to the quantum operation according to a result of the measurement and sets it as an output qubit.
- a quantum operation device generates a first qubit string and a second qubit string, and quantum entangles the generated first qubit string and second qubit string in a quantum mechanical manner. It is preferable to include a bit generation unit.
- the first qubit string, the second qubit string, and the input / output qubit each have a complex of a plurality of qubits or a quantum system having three or more quantum levels. It is preferable that
- a quantum state transfer method and a quantum state transfer system device that do not require unitary transformation.
- step S11 measurement is performed on a qubit string A composed of three or more qubits and an input qubit C (step S11).
- one qubit is selected from the qubits included in the qubit string B, which is composed of three or more qubits and quantum-entangled with the qubit string A according to the measurement result, and is output.
- the quantum bit D is set (step S12).
- the quantum state transfer method may include a step (step S21 in FIG. 2) of generating both the qubit strings A and B.
- the quantum state transfer method includes a step (step S22 in FIG. 2) of entangled both the qubit strings A and B quantum-mechanically.
- Both the qubit strings A and B and the input / output qubits C and D may each be a complex of a plurality of qubits or a quantum system having three or more quantum levels.
- step S31 measurement is performed on a qubit string A and an input qubit C composed of three or more qubits (step S31).
- the quantum operation f is performed on the qubits that are composed of three or more qubits and are included in the qubit string B that is quantum-mechanically entangled with the qubit string A (step S32). Further, one qubit is selected from the qubits subjected to the quantum operation f according to the result of the measurement, and set as an output qubit D (step S33).
- the quantum operation method preferably includes a step of generating both the qubit strings A and B (step S ⁇ b> 41 in FIG. 4).
- the quantum operation method includes a step (step S42 in FIG. 4) in which both the qubit strings A and B are quantum-mechanically entangled.
- Both the qubit strings A and B and the input / output qubits C and D may each be a complex of a plurality of qubits or a quantum system having three or more quantum levels.
- the quantum state transfer system device 10 includes a transmission device 11 and a reception device 12.
- the transmission device 11 performs measurement on the first qubit string A and the input qubit C including three or more qubits.
- the receiving device 12 selects one qubit from the qubits that are composed of three or more qubits and included in the qubit string B that is quantum-mechanically entangled with the qubit string A according to the measurement result.
- Output qubit D is a transmission device 11 and a reception device 12.
- the quantum state transfer system device 20 includes a transmission device 21, a reception device 22, and a qubit generation device 23.
- the qubit generation device 23 generates both the qubit strings A and B and entangles the generated qubit strings A and B quantum-mechanically.
- Both the qubit strings A and B and the input / output qubits C and D may each be a complex of a plurality of qubits or a quantum system having three or more quantum levels.
- FIG. 7 is a block diagram showing a configuration of a transmission apparatus according to the fourth embodiment of the present invention.
- the transmission device 30 includes a quantum measurement unit 31 and a communication unit 32.
- the quantum measurement unit 31 performs measurement on a qubit string A and an input qubit C composed of three or more qubits.
- the communication unit 32 transmits the measurement result to the receiving device.
- FIG. 8 is a block diagram showing a configuration of a receiving apparatus according to the fifth embodiment of the present invention.
- the reception device 40 includes a qubit selection unit 41 and a communication unit 42.
- the communication unit 42 receives the results of measurements performed on the qubit string A and the input qubit C composed of three or more qubits.
- the qubit selection unit 41 includes three or more qubits and one qubit from the qubits included in the qubit string B quantum-mechanically entangled with the qubit string A according to the measurement result. Is selected as the output qubit D.
- FIG. 9 is a block diagram showing a configuration of a quantum operation device according to the sixth embodiment of the present invention.
- the quantum computation device 50 includes a quantum measurement unit 51, a qubit selection unit 52, and a quantum computation unit 54.
- the quantum measurement unit 51 measures a qubit string A and an input qubit C composed of three or more qubits.
- the quantum operation unit 54 performs the quantum operation f on the qubits that are composed of three or more qubits and are included in the qubit sequence B that is quantum-mechanically entangled with the qubit sequence A.
- the qubit selection unit 52 selects one qubit as an output qubit D from the qubits subjected to the quantum operation f according to the measurement result.
- the quantum arithmetic device 50 may further include a qubit generation unit 53.
- the qubit generation unit 53 generates both the qubit strings A and B and entangles the generated qubit strings in a quantum mechanical manner.
- Both the qubit strings A and B and the input / output qubits C and D may each be a complex of a plurality of qubits or a quantum system having three or more quantum levels.
- first and second qubit strings each including three or more qubits are generated.
- the states of the first and second qubit strings are entangled quantum mechanically.
- the input qubit and the first qubit string are measured.
- one qubit is selected from the second qubit string and used as an output qubit. As described above, the quantum state of the input qubit can be transferred to the output qubit.
- quantum state transfer method first, two quantum bit sequences that are entangled quantum mechanically are generated, and quantum states are transferred using the entangled state.
- Each of the two qubit strings consists of three or more qubits, and this point is clearly different from conventional quantum teleportation using entangled qubit pairs.
- the unitary transformation of ⁇ i in the conventional quantum teleportation is closely related to the impossibility of super light speed communication. Assuming that quantum teleportation that does not require the unitary transformation of ⁇ i is possible using entangled qubit pairs, the quantum state of the input qubit is instantaneously transferred to the output qubit. This is contrary to the impossibility of superspeed communication. Therefore, it is impossible to realize quantum teleportation that does not require the unitary transformation ⁇ i using the entangled qubit pair.
- the entangled two qubit strings are used so that the quantum state of the input qubit is transferred to one of the second qubit strings.
- the state of the transferred qubit is close to the state of the input qubit as it is (that is, without performing unitary transformation such as ⁇ i ).
- Which qubit of the plurality of qubits in the second qubit string is actually transferred is determined by the measurement performed on the input qubit and the first qubit string. Therefore, according to the result of this measurement, one qubit is selected from the second qubit string and used as an output qubit. Until this measurement result is transmitted, it is not known which qubit of the second qubit string is the output qubit, so that it does not violate the request for the impossibility of superspeed communication.
- the second qubit string is preferably composed of at least three qubits. Since the first qubit string must be entangled with the second qubit string mechanically, it is preferable that the first qubit string is also composed of three or more qubits.
- the sender has an input qubit and a first qubit string
- the receiver has a second qubit string
- the sender performs measurements on the input qubit and the first qubit string, What is necessary is just to send the measurement result to a receiver by classical communication.
- the quantum state transfer method according to the seventh embodiment as a quantum operation method for performing the quantum operation f, after the states of the first and second quantum bit strings are quantum-mechanically entangled, The same quantum operation f may be applied to each qubit of the second qubit string.
- the quantum state of the input qubit without performing the unitary transformation required in the conventional quantum teleportation procedure Can be transferred to the output qubit.
- any one qubit in the second qubit string held by the receiver is input. Since the quantum state of the qubit is transferred as it is, the receiver can perform the same processing in parallel on all the qubits of the second qubit string without waiting for classical communication from the sender. The next process can proceed.
- FIG. 10 is a block diagram showing the configuration of the quantum state transfer system apparatus according to the first embodiment of the present invention.
- the quantum state transfer system device 60 according to this embodiment includes a transmission device 61, a reception device 62, and a qubit generation device 63.
- the transmission device 61 transmits the quantum state of the input qubit C.
- the reception device 62 receives the quantum state transferred from the transmission device 61 as the quantum state of the output qubit D.
- the transmission device 61 and the reception device 62 are connected by a classical communication path 64.
- the qubit generation device 63 generates a first qubit string A and a second qubit string B.
- the qubits constituting the first qubit string A are A1 to AN, and the qubits constituting the second qubit string B are B1 to BN.
- N is an integer of 3 or more.
- the qubit generation device 63 entangles the first qubit string A and the second qubit string B quantum-mechanically. The first qubit string A and the second qubit string B entangled in this way are distributed to the transmission device 61 and the reception device 62, respectively.
- the transmission device 61 includes a quantum measurement unit 71 and a communication unit 72.
- the quantum measurement unit 71 measures the input qubit C and the first qubit string A.
- the communication unit 72 transmits the result of the measurement performed by the quantum measurement unit 71 to the receiving device 62 via the classical communication path 64.
- the receiving device 62 includes a communication unit 73 and a qubit selection unit 74.
- the communication unit 73 receives the measurement result transmitted from the transmission device 61 via the classical communication path 64.
- the qubit selection unit 74 selects one of the N qubits B1 to BN in the second qubit string B as the output qubit D according to the measurement result received by the communication unit 73. .
- the transmission device 61, the reception device 62, and the qubit generation device 63 transfer the quantum state of the input qubit C to the output qubit D according to the following procedure.
- the qubit generation device 63 generates 2N qubits A1 to AN, B1 to BN, and a state in which the quantum states of these qubits are quantum-mechanically entangled
- ⁇ >
- the qubit generation device 63 distributes the qubits A1 to AN to the transmission device 61 as the first qubit sequence A, and distributes the qubits B1 to BN to the reception device 62 as the second qubit sequence B.
- POVM Physical Operator Valued Measure
- I Am represents a unit matrix in the state space of N ⁇ 1 qubits excluding the qubit Am among the N qubits A1 to AN. Furthermore, * represents a direct product symbol.
- the communication unit 72 of the transmission device 61 transmits the measurement result j based on the above generalized measurement to the reception device 62.
- the communication unit 73 of the receiving device 62 receives the measurement result j.
- the qubit selection unit 74 selects the qubit Bj from the N qubits B1 to BN in the second qubit string B and sets it as the output qubit D.
- FIG. 11 shows the average transfer fidelity when the quantum state is transferred by the above-described procedure by numerical calculation, and shows the result as a function of the number N of qubits included in the qubit string B.
- the average fidelity when the number of qubits N is smaller than 3 does not exceed the classical limit.
- the average fidelity when the number of qubits N is 3 or more exceeds the classical limit, and the average transfer fidelity approaches 1 as N increases.
- FIG. 12 is a block diagram illustrating the configuration of the quantum arithmetic device according to the present embodiment.
- the quantum arithmetic device 80 receives an input qubit C and outputs an output qubit D.
- the quantum operation device 80 includes a quantum measurement unit 81, a qubit selection unit 82, a qubit generation unit 83, and a quantum operation unit 84.
- the qubit generation unit 83 generates a first qubit string A and a second qubit string B.
- the qubits constituting the first qubit string A are A1 to AN
- the qubits constituting the second qubit string B are B1 to BN.
- N is an integer of 3 or more.
- the qubit generation unit 83 entangles the generated first qubit string A and second qubit string B quantum-mechanically.
- the quantum measurement unit 81 measures the input qubit C and the first qubit string A.
- the quantum operation unit 84 performs the same quantum operation f on N qubits B1 to BN constituting the second qubit string B.
- the qubit selection unit 82 selects one of the N qubits B1 to BN in the second qubit string B according to the measurement result by the quantum measurement unit 81, and outputs the selected qubit Output as qubit D.
- the quantum operation device 80 outputs the output qubit D obtained by performing the quantum operation f on the quantum state of the input qubit C input in the following procedure.
- the qubit generation unit 83 generates 2N qubits A1 to AN and B1 to BN, and sets the state
- the quantum operation unit 84 performs the same operation f on each of the N quantum bits B1 to BN included in the second quantum bit string B.
- the qubit selection unit 82 selects the qubit Bj from the N qubits B1 to BN of the second qubit string B and sets it as the output qubit D.
- the entangled state of the first qubit string A and the second qubit string B in the present invention is not limited to the above state
- the generalized measurement in the present invention is not limited to the above-described POVM element j j .
- the above description was performed based on the Example, this invention is not limited to the said Example.
- the examples and the examples can be changed and adjusted based on the basic technical concept.
- Various combinations and selections of various disclosed elements are possible within the scope of the claims of the present invention. That is, the present invention of course includes various variations and modifications that could be made by those skilled in the art according to the entire disclosure including the claims and the technical idea.
- Quantum operation unit 64 Classical communication path
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Abstract
Description
本発明は、日本国特許出願:特願2008-186256号(2008年7月17日出願)の優先権主張に基づくものであり、同出願の全記載内容は引用をもって本書に組み込み記載されているものとする。
本発明は、量子状態の転送を行う量子状態転送方法及び量子状態転送システム装置、並びに、量子状態に対する演算を行う量子演算方法及び量子演算装置に関する。
送信装置が、3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対する測定を行う工程と、
受信装置が、3つ以上の量子ビットから成るとともに第1の量子ビット列と量子力学的にエンタングルされた第2の量子ビット列に含まれる量子ビットから、前記測定の結果に応じて、1つの量子ビットを選択して出力量子ビットとする工程と、を含む。
第4の展開形態の量子状態転送方法は、上記測定がPOVM(Positive Operator Valued Measure)測定であってもよい。
量子演算装置が、3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対する測定を行う工程と、
3つ以上の量子ビットから成るとともに第1の量子ビット列と量子力学的にエンタングルされた第2の量子ビット列に含まれる量子ビットに対して量子演算を施す工程と、
量子演算が施された量子ビットから、前記測定の結果に応じて、1つの量子ビットを選択して出力量子ビットとする工程と、を含む。
3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対する測定を行う送信装置と、
3つ以上の量子ビットから成るとともに第1の量子ビット列と量子力学的にエンタングルされた第2の量子ビット列に含まれる量子ビットから、前記測定の結果に応じて、1つの量子ビットを選択して出力量子ビットとする受信装置と、を備えている。
第10の展開形態の量子状態転送システム装置は、上記測定がPOVM(Positive Operator Valued Measure)測定であってもよい。
3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対する測定を行う量子測定部と、
前記測定の結果を受信装置に送信する通信部と、を備えている。
3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対して行われた測定の結果を受信する通信部と、
3つ以上の量子ビットから成るとともに第1の量子ビット列と量子力学的にエンタングルされた第2の量子ビット列に含まれる量子ビットから、前記測定の結果に応じて、1つの量子ビットを選択して出力量子ビットとする量子ビット選択部と、を備えている。
3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対する測定を行う量子測定部と、
3つ以上の量子ビットから成るとともに第1の量子ビット列と量子力学的にエンタングルされた第2の量子ビット列に含まれる量子ビットに対して量子演算を施す量子演算部と、
前記量子演算が施された量子ビットから、前記測定の結果に応じて、1つの量子ビットを選択して出力量子ビットとする量子ビット選択部と、を備えている。
本発明の第1の実施形態に係る量子状態転送方法について図面を参照して説明する。図1及び図2は本実施形態に係る量子状態転送方法のフローチャートである。
本発明の第2の実施形態に係る量子演算方法について図面を参照して説明する。図3及び図4は本実施形態に係る量子演算方法のフローチャートである。
本発明の第3の実施形態に係る量子状態転送システム装置について図面を参照して説明する。図5及び図6は、本発明の第3の実施形態に係る量子状態転送システム装置の構成を示すブロック図である。
本発明の第4の実施形態に係る送信装置について図面を参照して説明する。図7は、本発明の第4の実施形態に係る送信装置の構成を示すブロック図である。
本発明の第5の実施形態に係る受信装置について図面を参照して説明する。図8は、本発明の第5の実施形態に係る受信装置の構成を示すブロック図である。
本発明の第6の実施形態に係る量子演算装置について図面を参照して説明する。図9は、本発明の第6の実施形態に係る量子演算装置の構成を示すブロック図である。
本発明の第7の実施形態に係る量子状態転送方法について説明する。
本発明の第8の実施形態に係る量子演算方法について説明する。
本発明の全開示(請求の範囲を含む)の枠内において、さらにその基本的技術思想に基づいて、実施例ないし実施例の変更・調整が可能である。また、本発明の請求の範囲の枠内において種々の開示要素の多様な組み合わせないし選択が可能である。すなわち、本発明は、請求の範囲を含む全開示、技術的思想にしたがって当業者であればなし得るであろう各種変形、修正を含むことは勿論である。
11、21、30、61 送信装置
12、22、40、62 受信装置
23、63 量子ビット生成装置
31、51、71、81 量子測定部
32、42、72、73 通信部
41、52、74、82 量子ビット選択部
50、80 量子演算装置
53、83 量子ビット生成部
54、84 量子演算部
64 古典通信路
Claims (18)
- 送信装置が、3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対する測定を行う工程と、
受信装置が、3つ以上の量子ビットから成るとともに前記第1の量子ビット列と量子力学的にエンタングルされた第2の量子ビット列に含まれる量子ビットから、前記測定の結果に応じて、1つの量子ビットを選択して出力量子ビットとする工程と、を含む量子状態転送方法。 - 量子ビット生成装置が、前記第1の量子ビット列及び前記第2の量子ビット列を生成する工程を含む、請求項1に記載の量子状態転送方法。
- 前記量子ビット生成装置が、前記第1の量子ビット列と前記第2の量子ビット列とを量子力学的にエンタングルさせる工程を含む、請求項1又は2に記載の量子状態転送方法。
- 前記第1の量子ビット列及び前記第2の量子ビット列並びに前記入出力量子ビットは、それぞれ、複数の量子ビットの複合体又は3つ以上の量子準位を有する量子系である、請求項1乃至3のいずれか1項に記載の量子状態転送方法。
- 前記測定は、POVM(Positive Operator Valued Measure)測定である、請求項1乃至4のいずれか1項に記載の量子状態転送方法。
- 量子演算装置が、3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対する測定を行う工程と、
3つ以上の量子ビットから成るとともに前記第1の量子ビット列と量子力学的にエンタングルされた第2の量子ビット列に含まれる量子ビットに対して量子演算を施す工程と、
前記量子演算が施された量子ビットから、前記測定の結果に応じて、1つの量子ビットを選択して出力量子ビットとする工程と、を含む量子演算方法。 - 前記量子演算装置が、前記第1の量子ビット列及び前記第2の量子ビット列を生成する工程を含む、請求項6に記載の量子演算方法。
- 前記量子演算装置が、前記第1の量子ビット列と前記第2の量子ビット列とを量子力学的にエンタングルさせる工程を含む、請求項6又は7に記載の量子演算方法。
- 前記第1の量子ビット列及び前記第2の量子ビット列並びに前記入出力量子ビットは、それぞれ、複数の量子ビットの複合体又は3つ以上の量子準位を有する量子系である、請求項6乃至8のいずれか1項に記載の量子演算方法。
- 3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対する測定を行う送信装置と、
3つ以上の量子ビットから成るとともに前記第1の量子ビット列と量子力学的にエンタングルされた第2の量子ビット列に含まれる量子ビットから、前記測定の結果に応じて、1つの量子ビットを選択して出力量子ビットとする受信装置と、を備えている量子状態転送システム装置。 - 前記第1の量子ビット列及び前記第2の量子ビット列を生成するとともに、生成された前記第1の量子ビット列と前記第2の量子ビット列とを量子力学的にエンタングルさせる量子ビット生成装置を備えている、請求項10に記載の量子状態転送システム装置。
- 前記第1の量子ビット列及び前記第2の量子ビット列並びに前記入出力量子ビットは、それぞれ、複数の量子ビットの複合体又は3つ以上の量子準位を有する量子系である、請求項10又は11に記載の量子状態転送システム装置。
- 前記測定は、POVM(Positive Operator Valued Measure)測定である、請求項10乃至12のいずれか1項に記載の量子状態転送システム装置。
- 3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対する測定を行う量子測定部と、
前記測定の結果を受信装置に送信する通信部と、を備えている送信装置。 - 3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対して行われた測定の結果を受信する通信部と、
3つ以上の量子ビットから成るとともに前記第1の量子ビット列と量子力学的にエンタングルされた第2の量子ビット列に含まれる量子ビットから、前記測定の結果に応じて、1つの量子ビットを選択して出力量子ビットとする量子ビット選択部と、を備えている受信装置。 - 3つ以上の量子ビットから成る第1の量子ビット列及び入力量子ビットに対する測定を行う量子測定部と、
3つ以上の量子ビットから成るとともに前記第1の量子ビット列と量子力学的にエンタングルされた第2の量子ビット列に含まれる量子ビットに対して量子演算を施す量子演算部と、
前記量子演算が施された量子ビットから、前記測定の結果に応じて、1つの量子ビットを選択して出力量子ビットとする量子ビット選択部と、を備えている量子演算装置。 - 前記第1の量子ビット列及び前記第2の量子ビット列を生成するとともに、生成された前記第1の量子ビット列と前記第2の量子ビット列とを量子力学的にエンタングルさせる量子ビット生成部を備えている、請求項16に記載の量子演算装置。
- 前記第1の量子ビット列及び前記第2の量子ビット列並びに前記入出力量子ビットは、それぞれ、複数の量子ビットの複合体又は3つ以上の量子準位を有する量子系である、請求項16又は17に記載の量子演算装置。
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JP2012105139A (ja) * | 2010-11-11 | 2012-05-31 | Shigemi Okawa | エンタングル状態を用いた通信方法 |
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